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7/31/2019 Servo Datasheet
1/14
Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:11
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Features
PT8A995 works as encoder and PT8A996 work
as decoders
Supply voltage: 3.0V to 6.4V
Internal auto-shutdown function
Internal over-load protection to meet HD271 safety
specification (996)
Integrated RF circuit (995)
Two analog channels, one for tachospeed and the
other for steering
32 steps for each of two analog channels
Fine tuning selection for two analog channels
Few external components needed
Closed loop adjustment for servo motor (996)
Built-in voltage regulator (996)
Package: 16-pin DIP (995P), 20-pin DIP (996P)
and 20-pin SOIC (996S)
Applications
Remote Controller
Toys
Remote Measurement
General Description:
The PT8A995 and PT8A996 provide a simple and
economic solution for basic Digital Proportional R/C
car toys. The chipset uses CMOS LSI Analog and
Mixed Signal technology. They provide high quality
encoder/decoder circuit.
PT8A995 severs as an encoder. When it is applied in
R/C car, the built-in AD converter samples the external
tachospeed and steering inputs and converts them into
5-bit digital signals. The internal coder assembles these
signals into a multi-frame. It contains header, data and
CRC value. To obtain accurate timing easily, Manches-
ter encoding is employed. Some digital modulation
scheme can be used, e.g., general ASK, OOK, FSK and
QPSK. OOK is easy to implement and low cost.
PT8A996 works as a decoder. Demodulated RF sig-
nal will be amplified and filtered in 996 to get
baseband signal. DPLL is adopted to generate sam-
pling clock. The decoder logic can extract F/B, L/R
and functional bits from received signal. The outputs
are pulse-width-modulated. When motors are blocked,
the built-in over-load protection mechanism will work
to meet Toy Safety Requirement.
PT8A995 RF Transmitter PT8A996RF Receiver
Transmitter Receiver
Figure 1: Application Diagram
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:12
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Block Diagram
Figure 2. Block Diagram of PT8A995
Oscillator TimingGenerator
AD
Encoder
&
Logic
Control
RF
Osc
OSCIOSCO
SC
CA1
CA2
F/B
L/R
Offset1
Offset2
RFout
PC
IRout/SC
F1
F2
Figure 3. Block Diagram of PT8A996
OSCI
OSCO
OSC
VT1
AD
SRV
SI
Current
Limiter
SerialTo
Parallel
Timing
GeneratorFilter
PWM&
Logic
DPLL
Left
Forward
F2
Right
Backward
F1
VI1 VI2VO1 VO2
VCC VrefREF
VT2
CRC
Check
FC
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:13
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Pin Configuration
Top View
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
F2
F1
IRout
GND
RFout
CA1
CA2
SC
PC
L/R
F/B
OSCI
OSCO
VCC
Offset2
Offset1
PT8A995P
16-Pin DIP
Pin DescriptionTable 1. Pin Description of PT8A995
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Forward
Backward
Right
Left
GND
VT2
VT1
VO2
VI2
VO1
F2
F1
PC
SRV
OSCI
OSCO
VCC
SI
FC
VI1
PT8A996P
20-Pin DIP
20-Pin SOIC
.oNniP .oNniP .oNniP .oNniP .oNniP emanniP emanniP emanniP emanniP emanniP noitpircseD noitpircseD noitpircseD noitpircseD noitpircseD
1 2F niplortnocnoitcnuf2F
2 1F niplortnocnoitcnuf1F
3 tuoRI seirraczHK83htiwedoctuptuO
4 DNG dnuorG
5 tuoFR seirraczHM94roM72htiwedoctuptuO
6 1AC tupnirotallicsolatsyrczHM94roM72
7 2AC tuptuorotallicsolatsyrczHM94roM72
8 CS edoctuptuO
9 1tesffO tupnideepsfotnemtsujdatesfforofdesU
01 2tesffO tupnignireetsfotnemtsujdatesfforofdesU
11 VCC
rewop
21 O OCS tuptuorotallicsolatsyrC
31 O ICS tupnirotallicsolatsyrC
41 B/F deepsdrawkcab&drawrofroftupnI
51 R/L thgir&tfelelgnagnireetsroftupnI
61 CP tuptuolortnocrewoP
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:14
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
.oNniP .oNniP .oNniP .oNniP .oNniP emaNniP emaNniP emaNniP emaNniP emaNniP noitpircseD noitpircseD noitpircseD noitpircseD noitpircseD
1 drawroF tuptuodrawroF
2 drawkcaB tuptuodrawkcaB
3 thgiR tuptuothgiR
4 tfeL tuptuotfeL
5 DNG DNG
6 2TV tupninoitcetorptimiltnerrucrotomB/F
7 1TV tupninoitcetorptimiltnerrucrotomR/L
8 2OV tuptuoyfilpmaegatsdnocesehT
9 2IV tupniyfilpmaegatsdnocesehT
01 1OV tuptuoyfilpmaegatstsrifehT
11 1IV tupniyfilpmaegatstsrifehT
21 CF tuptuonoitcennocabatuF
31 IS tupnilangisedocnE
41 VCC
rewoP
51 OCSO tuptuorotallicsolatsyrC
61 ICSO tupnirotallicsolatsyrC
71 VRS tupnikcabdeefrotomovreS
81 CP lortnocfforewopotuA
91 1F lortnoc1noitcnuF
02 2F lortnoc2noitcnuF
Table 2. Pin Description of PT8A996
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:15
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Functional Description
Functional Description of PT8A995
Oscillator Circuit
A fundamental crystal or ceramic resonator can be used as os-
cillator resonator. The central frequency is 455kHz. The fre-
quency tolerance can be up to 1.5%.
Internal A/D Converter
5-bit A/D converter is built-in. It has four input channels. To
get stable analog input, the level should be within 3/8 VCC
to
5/8 VCC
. The four channels are switched in turn. Refer to Fig.
3. When a 455kHz quartz is used, CLK is 1.18kHz. F/B and L/
R are converted into 5-bit. OffsetX is converted into 3-bit. No
external load capacitor is needed.
The analog input voltage and the corresponding digitalized
values are shown in Figure 5.
When the chipset is applied in R/C car, there are gross tuning
joysticks and fine tuning joysticks for SPEED and STEER-
ING respectively. We denote them SPEEDO, speedo,
STEERINGO, steeringo, corresponding to F/B, Offset1, L/R,
Offset2 respectively. Offset1 and offset2 complement F/B and
L/R offset respectively.
If current conversion values are Vsp, Vspo, Vst, Vsto, corre-
sponding to SPEEDO, speedo, STEERINGO, steeringo re-spectively, we can describe the SPEED value to be transmitted
as
Vspeed = Vsp + Vspo.
The STEERING value is
Vsteering = Vst + Vsto.
Encoder
Each time the transmitter is active, the chip will assemble
SPEED value and STEERING value into a multi-frame as
shown in Figure 6. The multi-frame has two sub-frames, de-
noted as odd frame and even frame.
After data are assembled, the bit stream is Manchester encoded.
It is illustrated in Figure 7. A rising edge denotes 1, and a
falling edge denotes 0.
The maximum encoding delay can be calculated by using fol-
lowing formula
Tmax = (48+5) * Tclock
= 53/1.18kHz = 45 (ms)
RF Circuit
RF circuit is integrated for easy application. A fundamental
crystal or third-tune crystal is required. The RF frequency canbe 27MHz or 49MHz. On-Off-Keying (OOK) scheme is
adopted for low cost and easy implementation.
Auto-Shutdown Function
Auto-shutdown function is adopted to lower power consump-
tion. Once input signal (joysticks, or F1 and F2) are silent for
at least 5 minutes, the chip will enter Shutdown Operation mode,
during which most circuits, including RF, are powered down.
The chip will exit Shutdown Operation mode and enter Nor-
mal Operation mode when F1 and F2 are active again. For
power dissipation, refer to Table 3.
When the chip enters Shutdown Operation mode, PC will out-
put LOW level, which will switch off external circuit. If it op-
erates normally, PC maintains HIGH level. If PC is forced to
HIGH level, the chip will not be auto-shut down forever.
MUX A/D
F/B
L/R
Offset1
Offset2
SA
CLK
Figure 4. Internal A/D Converter of PT8A995
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:16
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Figure 5. Analog Voltage and Digitalized Values
Figure 6. Multi-Frame Structure
01111110 111 3BF4BF 0 0BF-2BF 1F 3F 0 CRC
01111110 000 3LR4LR 0 0LR-2LR 1F 3F 0 CRC
Odd Frame
Even Frame
4
4
FB4-FB0: F/B values
RL4-RL0: R/L values
F4-F1: function value
F4/F3 are reserved
Figure 7. Manchester Modulation scheme
0
1
0
1
0
1 1
0 0
Manchester
edoM edoM edoM edoM edoM I(tnerruCniarDylppuSmumixaM I(tnerruCniarDylppuSmumixaM I(tnerruCniarDylppuSmumixaM I(tnerruCniarDylppuSmumixaM I(tnerruCniarDylppuSmumixaMCCCCCCCCCC))))) P(noitapissiDrewoP P(noitapissiDrewoP P(noitapissiDrewoP P(noitapissiDrewoP P(noitapissiDrewoP
ddddd)))))
noitarepOlamroN Am02 Wm001
noitarepOnwodtuhS Au02 Wu001
Table 3
1/47/128VDD
00000
10000
01111
11111
QAZ
VCC
SA81/128VDDDD VCC
1/2VCC
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:17
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Functional Description of PT8A996
When a baseband signal is applied to VI1 pin, it will be ampli-
fied and then filtered by the FILTER and sent to digital phase-
lock-loop (DPLL).
Once the loop is locked into input signal, HEADER in multi-
frame structure is detected. Data in bit stream are converted
into parallel output by Serial-to-Parallel module. If no CRC
error is found, the data are valid. At final step, FB and RL will
be pulse-width-modulated.
An internal A/D converter is required to make servo motor work
well. The inputs are SRV and Offset.
When an R/C car is out of control, over-load protection is pro-
vided by Current Limiter. If the R/C car is blocked by some
barriers, Forward and Backward are disabled. If servo motor
encounters troublesome, Left and Right are disabled.
Timing Generator
Timing Generator produces frequency signals of 151kHz and
37.8kHzfrom a 455kHz master clock.
Internal Amplifier
The baseband signal is amplified in two stages. An active band-
pass filter is applied externally. It can be achieved by RC filter.
DPLL
A digital PLL is built in PT8A996 to ensures 1.5 percent car-
rier frequency tolerance. 151kHz is used as local high fre-
quency.
PWM Modulation Scheme
The outputs of PT8A996 are pulse-width modulated for pro-
portional output. The duty-ratio of output is variable and ad-
justed by input on transmitter side. The average level is pro-
portional to analog input.
The pulse frequency is 37.8KHz. Duty ratio ranges from 1/64
to 1. The F/B controller works as a proportional adjuster with
32 steps. The L/R controller is made up of position control
loop and speed control loop to ensure high accuracy and speed.
Internal A/D Converter
5-bit A/D converter is built-in. It has two input channels. To
get stable analog input, the level should be within 3/8 VCC
to
5/8 VCC
. The scale is linear. A time-division multiplexing
method is used as a simple way to switch between two chan-
nels in PT8A996. When a 455kHz quartz is used, CLK is
1.18KHz. SRV is converted into 5-bit. Offset is converted into
3-bit to complement L/R offset (Offset2 on transmitter).
If current conversion values are Vsv and Vfd with regarding toSRV and Offset respectively, we can describe the servo FEED-
BACK value to be transmitted as
Vsrv = Vsv + Vfd.
Servo Feedback System
For more accurate motor position, servo feedback is necessary.
Overload Protection Function
Over-load protection function is shown in Figure 9. Once VT
keeps effective more than Te and ineffective less than Tm, the
chip enters over-load protection mode. It will disable all out-put. The device will exit over-load protection mode when VT
is not effective more than 200ms.
Futaba compatible connection
The PT8A996 has a FC pin, whose output signal can directly
control Futabas servo-motor or other compatible servo-motor.
The signal is illustrated in Figure 10.
VT1 or VT2
VT
VT is effective Te >= 3s
Tm < 200ms
Enters over-load
protection state
VT is not effective
and exists over-load
protection
200ms
0.4V
Figure 9. Over-Load Protection Function
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:18
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Figure 10. Output from FC Pin
t1
t2
t1
=0.85ms~1.66ms (Pulsewidth Adjustment Step = 27us)
t2
=13.5ms
X 12 7 M
X2
4 5 5 K
F21
F12
I R o u t3
G N D4
R F o u t5
C A16
C A27
S C8
Offset19
Offset210
Vc c11
O S C O 12
O S C I13
F/ B14
L/ R15
P C16
P T 8 A 9 9 5
C 9
2 0p
C 102 0p
S W
R 9
1 K
L E D B A T
4- 6v
C 11
0 . 1 u
R V2
5. 1k
R V 1
5 . 1 k
C 14
C S
0. 1u
CI
33 pR O
20 k C O
33 p
F2
F1
C0 1
24 0C0 2
1 5 0 p
C 03
15 p
C0 6
47 pC 051 2 0 p
C0 4
39 p
L 01
0 . 2 7
L0 2
0 . 2 2 u L0 3
0 . 3 6 u
L0 4
2. 4u
C 07
2 7p
A N T
D 1
I N 4 1 4 8
Vc c
Vc c
Vc c
L O S C
3u
Figure 11. Application of PT8A995 with Internal Modulation
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:19
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Figure12.ApplicationofP
T8A995withExternalModulation
X1
27M
X2
455K
F2
1
F1
2
IRout
3
GND
4
RFout
5
CA1
6
CA2
7
SC
8
Offset1
9
Offset2
10
Vcc
11
OSCO
12
OSCI
13
F/B
14
L/R
15
PC
16
PT8A995
C9
20p
C10
20p
SW
R9
3k
LED
BAT
7.2-
12V
C11
0.1u
RV2
5k
RV1
5k
ANT
Q1
L2
1.5mH
C1
68p
C2
150p
C4
15n
C3
1n
R2
10
C6
68p
C14
CS
0.1u
CI
33p
Vin
1
GND
2
Vout
3V1
78L05
RO
20k
CO
33p
F2
F1
Vcc
VRF
RE1
51
CE 430
p
Q2
9018
RB2
1K
CF
0.1
5u
RF
330
RB1
1K
Vcc
Vcc
Vc
c
VRF
LOS
C
3uH
RE2
51
CP
4.7u
L1B
LA
3.3u
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:110
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Figure13.Supper-Regenera
tionApplicationCircuitofPT8A996
A1
C1
10p
VT1
C945
C2
27p
L18.2u
C3
3300p
C44.7u
C50.0
1u
C627p
L2
R1
560p
R2
22k
R4
3.3
k
R322k
VT2
C38
0R5430
R6470
C7100p
R710k
R8
10k
C80.1u
L3
4.7u
R10
200
C14
0.0
1u
C15
0.0
1u
G1
455k
R11
*
Left
Right
Backward
Forward
VT1
VCC
2
SI
C16
470p
C90.1u
C17
330p
C18
4700p
R12
2.2M
R14
2.2
k
R13
2.2M
R15
2.2
k
C19
0.1u
R16
2.2
k
VCC
2
Forward
1
Backward
2
Right
3
Left
4
GND
5
VT2
6
VT1
7
VO2
8
VI2
9
VO1
10
VI1
11
FC
12
SI
13
Vcc
14
OSCO
15
OSCI
16
SRV
17
PC
18
F1
19
F2
20
PT8A996
R17
5k
C20
25p
R18
5k
FeedBack
SI
R19
2k
R23
300
R24
300
R290.2
VT3
IRFZ48N
VT4
IRFZ48N
VT5
IRF4905
VT6
IRF4905
C10
0.1u
VT7
8050
VT8
8050
VT9
8050
VT10
8050
R25
300
R20
2k
R26
300
Backward
Forward
R30
3k
R31
3k
VT1
M1
R32
1
10
C21
100u
C11
0.1u
C12
0.1u
C22
470u
VCC2
L422u
D2
NJM43
1
R910k
R33
16k
B1
3.6v
SW
1
B2
3.6v
VCC1
VCC1
VCC
2
F1Function
Loading
F2Function
Loading
VT11
8050
VT12
8050
VT13
BD237
VT14
BD237
R21
2k
R27
300
R28
300
R22
2k
VT15
B
D238
VT16
BD238
C13
0.1u
Left
Right
M2
VCC1
R34
1.3
k
4.7u
C23
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Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:111
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Figure14.Supper-HeterodyneApplicationCircuitofPT8A996
G1
455k
R1
0~5k
Left
Right
Backward
Forward
VT1
Vcc2S
I
C1
0.1u
C4330p
C5
4700p
R2
2.2M R
32.2
k
Vcc2
Forward
1
Backward
2
Right
3
Left
4
GND
5
VT2
6
VT1
7
VO2
8
VI2
9
VO1
10
VI1
11
FC
12
SI
13
Vcc
14
OSCO
15
OSCI
16
SRV
17
PC
18
F1
19
F2
20
PT8A996
R45k
C6
150p
R5
5k
FeedBack
SI
VT1
8050
VT2
8050
VT7
BD237
VT8
BD237
R6 2k
R10
300
R11
300
R7
2k
VT9
BD238
VT10
BD238
C20.1u
Left
Right
M1
Motor
1
R8
2k
R12
300
R13
300
R16
0.2
VT11
IRFZ48N
VT12
IRFZ48N
VT13
IRF4905
V
T14
IR
F4905
C30.1u
VT3
8050
VT4
8050
VT58050
VT68050
R14
300
R92k
R15
300
Backwar
Forward
R173k
R183k
M2
Motor2
R19
110
C
7
100u
C8
0.1u
C90.1u
C10
470u
Vcc2
L122u
D1
NJM431
R20
10k
R21
16k
B1
3.6v
SW1
Switch
B2
3.6v
Vcc1
Vcc1
Vcc1
Vcc2
F1Function
Loading
F2Function
Loading
R22
6.8
kR23
2.7
k
R25
120
R26
220
C11
27p
C12
0.0
1u
C15
0.0
1u
C17
20p
C14
680p
C16
0.0
1u
C18
3-10p
C19
0.0
47
u
C20
3.3u
C21
180p
L2
5.1u
T1
1.2u
T32u
L32.2u
A 1
G2
27M
T2
FL1
455k
1
35
6
7
8
10
11
13
PT8A201
VT1
59018
Vcc2
Vcc2
70
82
7
D41N60
D3
1N60
R27
510
VT1
R28
1.3
k
C22
47u
D61N4148
C23
150p
D
2
1
N60
D5
1N60
R24
2.2
k
C130.1u
T1
T2
6:10
-
7/31/2019 Servo Datasheet
12/14
Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:112
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Figure15.
Futaba-S3003Se
rvoApplicationCircuitofPT8A996
A1
C1
10p
VT1
C945
C2
27p
L 18.2u
C3
3300p
C44.7u
C5
0.0
1u
C627p
L2
R1
560p
R2
22k
R4
3.3
k
R322k
VT2
C380
R5430
R6470
C7100p R
710k
R810k
C80.1u
L3
4.7u
R10
200
C13
0.0
1u
C14
0.0
1u
G1
455k
R11*
Left
Right
Backward
Forward
VT1
VCC2
S I
C15
470p
C90.1u
C16
330p
C17
4700p
R12
2.2M
R14
2.2
k
R
13
2.2M
R15
2.2k C
180.1
u
R16
2.2
k
VCC2
Forward
1
Backward
2
Right
3
Left
4
GND
5
VT2
6
VT1
7
VO2
8
VI2
9
VO1
10
VI1
11
FC
12
SI
13
VCC
14
OSCO
15
OSCI
16
SRV
17
PC
18
F1
19
F2
20
PT8A996
R17
5k
C19
25p
R18
5k
FeedBack
SI
R19
2k
R21
300
R22
300
VT3
IRFZ48N
VT4
IRFZ48N
VT5
IRF4905
VT6
IRF4905
C100.1u
VT7
8050
VT8
8050
VT9
8050
VT10
8050
R2
3
300
R20
2k
R24
300
Backward
Forward
R26
3k
R27
3k
M1
R28
110
C20
100u
C11
0.1u
C12
0.1u
C21
470u
VCC2
L422u
D1
NJM431
R910k
R29
16k
B1
3.6v
SW1
B2
3.6v
VCC1
VCC1
VCC2
F1Function
Loading
F2Function
Loading
SI
1
VCC
2
GND
3
Servo1
Futaba_
S3003
F C
FC
VCC1
R25
0.2
VT1
R30
1.3
k
4.7u
C22
-
7/31/2019 Servo Datasheet
13/14
Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:113
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Figure 16. Mechanical Diagram of 20-pin SOIC
-
7/31/2019 Servo Datasheet
14/14
Data Sheet
PT8A995/996 DigitalProportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
PT0072(05/02) Ver:114
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Notes
Pericom Technology Inc.
Email: [email protected] Web Site: www.pti.com.cn, www.pti-ic.com
China: No. 20 Building, 3/F, 481 Guiping Road, Shanghai, 200233, ChinaTel: (86)-21-6485 0576 Fax: (86)-21-6485 2181
Asia Pacific: Unit 1517, 15/F, Chevalier Commercial Centre, 8 Wang Hoi Rd, Kowloon Bay, HongkongTel: (852)-2243 3660 Fax: (852)- 2243 3667
U.S.A.: 2380 Bering Drive, San Jose, California 95131, USATel: (1)-408-435 0800 Fax: (1)-408-435 1100
Pericom Technology Incorporation reserves the right to make changes to its products or specifications at any time, without notice, in order to improvedesign or performance and to supply the best possible product. Pericom Technology does not assume any responsibility for use of any circuitry describedother than the circuitry embodied in Pericom Technology product. The company makes no representations that circuitry described herein is free frompatent infringement or other rights, of Pericom Technology Incorporation.