PT8A995/9961/9962/9963/9964
Digital Proportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
Features
• PT8A995 works as encoder and PT8A9961/9962/
9963/9964 work as decoders
• Supply voltage: 3.3V to 6.0V
• Internal auto-shutdown function
• Internal over-load protection to meet HD271 safety
specification (996x)
• 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 (996x)
• Built-in voltage regulator (996x)
• Package: 16-pin DIP (995P), 20-pin DIP (996xP),
20-pin SOIC (996xS), see Ordering Information.
Description
The PT8A995 and PT8A996x provide a simple and eco-
nomic 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. To obtain accurate tim-
ing easily, Manchester encoding is employed. Some digi-
tal modulation scheme can be used, e.g., general ASK,
OOK, FSK and QPSK. OOK is easy to implement and
low cost.
The PT8A996x provides a simple and cost effective so-
lution for basic Digital Proportional R/C car toys with
PT8A995 together. RF circuit in receiver side can de-
modulate RF signal. The demodulated signal will be am-
plified and filtered. After that, the base-band signal is
formed. DPLL is adopted to generate sampling clock.
An internal A/D converter is required to make servo mo-
tor work well. The inputs are SRV and OFFSET. Over-
load protection mechanism is built-in to meet Toy Safety
Requirement.
Applications
• Remote Controller
• Toys
• Remote Measurement
Ordering Information
The PT8A996x provide four solutions for toy car by dif-
Part Number
PT8A995PE
PT8A996xPE
PT8A996xSE
Package
Lead free 16-pin DIP
Lead free 20-pin DIP
Lead free and Green
20-pin SOIC
Note:
x means 1-4 to show different part no.
Adding E=Pb-free or Pb-free and Green
Adding X suffix=Tape/Reel
ferent capability Servo.
PT8A9961
mini car
PT8A9962
small car
PT8A9963
middle car
PT8A9964
large car
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PT0093-4
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PT8A995/9961/9962/9963/9964
Digital Proportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
Block Diagram
Figure 1. Block Diagram of PT8A995
OSCI
OSCO
Oscillator
Timing
Generator
F1
F/B
L/R
Offset1
Offset2
Encoder
&
Logic
Control
PC
IRout/SC
AD
F2
SC
CA1
CA2
RF
Osc
RFout
Figure 2. Block Diagram of PT8A9961/9962/9963/9964
SI
SI_ANA
Filter
DPLL
OSCI
OSCO
OSC
Timing
Generator
Header
Serial
To
Parallel
Power
On
VT1
VT2
V
CC
REF
Vref
Current
Limiter
SRV
AD
PID
CRC
check
PWM
&
Logic
Right
Left
Forward
Backward
F1
F2
FC
S1
V
CC
Pull down
GND
Parameter S2
Pull up
VI1
VO1
VI2
VO2
S1
1
1
0
0
S2
0
1
1
0
Part No.
PT8A9961
PT8A9962
PT8A9963
PT8A9964
Application
Mini car
Small car
Middle car
Large car
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PT0093-4
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PT8A995/9961/9962/9963/9964
Digital Proportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
Pin Configuration
PT8A995
16-Pin DIP
F2
F1
IRout
GND
RFout
CA1
CA2
SC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
PC
L/R
F/B
OSCI
OSCO
V
CC
Offset2
Offset1
Forward
Backward
Right
Left
GND
VT2
VT1
VO2
VI2
VO1
PT8A996x
20-Pin DIP
20-Pin SOIC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
F2
F1
PC
SRV
OSCI
OSCO
V
CC
SI
FC
VI1
Top View
Pin Description
Table 1. Pin Description of PT8A995
P in No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
P in n a me
F2
F1
IRout
GND
RFout
CA1
CA2
SC
Offset1
Offset2
V
CC
OSCO
OSCI
F/B
L/R
PC
F2 function control pin
F1 function control pin
Output code with 38KHz carries
Ground
Descr ip t ion
Output code with 27M or 49MHz carries
27M or 49MHz crystal oscillator input
27M or 49MHz crystal oscillator output
Output code
Used for offset adjustment of speed input
Used for offset adjustment of steering input
power
Crystal oscillator output
Crystal oscillator input
Input for forward & backward speed
Input for steering angle left & right
Power control output
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PT8A995/9961/9962/9963/9964
Digital Proportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
Table 2. Pin Description of PT8A9961/9962/9963/9964
P in No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
P in Na me
Forward
Backward
Right
Left
GND
VT2
VT1
VO2
VI2
VO1
VI1
FC
SI
V
CC
OSCO
OSCI
SRV
PC
F1
F2
Forward output
Backward output
Right output
Left output
GND
F/B motor current limit protection input
L/R motor current limit protection input
The second stage amplify output
The second stage amplify input
The first stage amplify output
The first stage amplify input
Futaba connection output
Encode signal input
Power
Crystal oscillator output
Crystal oscillator input
Servo motor feedback input
Auto power off control
Function1 control
Function2 control
Descr ip t ion
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
Note:
Storage Temperature .......................................................... -25
o
C to +85
o
C Stresses greater than those listed under MAXI-
Ambient Temperature with Power Applied ............................ 0
o
C to +70
o
C MUM RATINGS may cause permanent damage to
Supply Voltage to Ground Potential (Inputs & V
cc
Only) ....... -0.5 to +7.0V the device. This is a stress rating only and func-
Supply Voltage to Ground Potential (Outputs & D/O Only) ... -0.5 to +7.0V tional operation of the device at these or any other
DC Input Voltage .................................................................. -0.5 to +7.0V conditions above those indicated in the operational
DC Output Current .......................................................................... 20mA sections of this specification is not implied. Expo-
Power Dissipation ........................................................................ 500mW sure to absolute maximum rating conditions for ex-
tended periods may affect reliability.
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PT8A995/9961/9962/9963/9964
Digital Proportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
Recommended Operation Conditions
Sym
V
CC
V
IH
V
IL
F
OSC
T
A
Descr ip t ion
Supply Voltage
Input HIGH Voltage
Input LOW Voltage
Oscillator Frequency
Operation Temperature
Test C on d it ion s
-
-
-
-
-
Min
4.0
0.7V
CC
0
400
0
Typ
-
-
-
455
-
Ma x
5.5
V
CC
0.3V
CC
500
70
Un it s
V
V
V
kHz
O
C
DC Electrical Characteristics
Sym
I
CC
I
STB
I
OH
Descr ip t ion
Supply Current
Standby Current
Output HIGH Current
Output HIGH Current
Output LOW Current
I
OL
Output LOW Current
Input HIGH Current
I
IH
Input HIGH Current
Input HIGH Current
Input LOW Current
I
IL
Input LOW Current
Function pins
PC
Function pins
PC
VT1, VT2
SI, OSCI
Other input pins
SI, OSCI
Other input pins
V
IN
= 0V
V
IN
= V
CC
V
OUT
= 0.5V
V
IN
= V
CC
-0.5V
P in
Test C on d it ion s
Clock = 455kHz, outputs
unloaded
-
Min
-
-
-8
-15
8
-
-
-
-
-
-
Typ
-
-
-
-
-
-
-
-
-
-
-
Ma x
3
500
-
-
-
60
60
10
1
-10
-1
Un it s
mA
uA
mA
mA
mA
uA
uA
uA
uA
uA
uA
Note:
These specifications apply for V
CC
= 5.0V and 0
O
C
≤
T
A
≤
70
O
C, unless otherwise specified.
AC Electrical Characteristics
Sym
f
OSC
f
t
t
R
R
I
R
O
V
T
Descr ip t ion
Oscillator Frequency
Frequency Tolerance
Response Time*
Inverter Input Resistance
Inverter Output Resistance
Overload Protection
Test C on d it ion s
R
f
= 200k
Ω
-
f
OSC
= 455kHz
Apply for VI1 & VI2,
R
f
= 2.2M
Ω
Apply for VO1 & VO2
-
Min
400
-
-
50
-
0.3
Typ
455
-
-
-
-
0.4
Ma x
500
1.5
90
-
10
0.5
Un it s
kHz
%
ms
kΩ
kΩ
V
Note:
These specifications apply for V
CC
= 5.0V and 0
O
C
≤
T
A
≤
70
O
C, unless otherwise specified.
* The time from the transmitter’s control to the receiver
σ
response.
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