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Data Sheet
PT8A995/9961/9962/9963/9964
Digital Proportional Remote Controller
with 2 Analog CHs & 2 Digital CHs
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Features
Description
• 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.
Applications
• Remote Controller
• Toys
• Remote Measurement
Ordering Information
Part Number
PT8A995PE
PT8A996xPE
PT8A996xSE
Package
Lead free 16-pin DIP
Lead free 20-pin DIP
Lead free 20-pin SOIC
Note: x means 1-4 to show different part no.
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.
The PT8A996x provide four solutions for toy car by dif-
ferent capability Servo.
PT8A9961 PT8A9962 PT8A9963 PT8A9964
mini car small car middle car large car
PT0093(08/07)
1
Ver:3

No Preview Available !

Data Sheet
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
F/B
L/R
Offset1
Offset2
Oscillator
AD
Timing
Generator
F1
F2
Encoder
&
Logic
Control
SC
CA1
CA2
RF
Osc
RFout
PC
IRout/SC
Figure 2. Block Diagram of PT8A9961/9962/9963/9964
SI
OSCI
OSCO
SI_ANA
OSC
Timing
Generator
Filter
Header
Power
On
CRC
check
VT1
VT2 Current
VCC
REF Vref
Limiter
Serial
To
Parallel
SRV
AD
VI1
S1
1
1
0
0
VO1 VI2
S2 Part No.
0 PT8A9961
1 PT8A9962
1 PT8A9963
0 PT8A9964
DPLL
PWM
&
Logic
Right
Left
Forward
Backward
F1
F2
FC
S1 VCC
PID Pull down
Parameter S2 GND
Pull up
VO2
Application
Mini car
Small car
Middle car
Large car
PT0093(08/07)
2
Ver:3

No Preview Available !

Data Sheet
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 PC
15 L/R
14 F/B
13 OSCI
12 OSCO
11 VCC
10 Offset2
9 Offset1
Forward
Backward
Right
Left
GND
VT2
VT1
VO2
VI2
VO1
PT8A996x
20-Pin DIP
20-Pin SOIC
1 20
2 19
3 18
4 17
5 16
6 15
7 14
8 13
9 12
10 11
F2
F1
PC
SRV
OSCI
OSCO
VCC
SI
FC
VI1
Top View
Pin Description
Table 1. Pin Description of PT8A995
Pin No.
Pin name
Descr iption
1 F2 F2 function control pin
2 F1 F1 function control pin
3
IRout
Output code with 38KHz carries
4
GND
Ground
5
RFout
Output code with 27M or 49MHz carries
6 CA1 27M or 49MHz crystal oscillator input
7 CA2 27M or 49MHz crystal oscillator output
8 SC Output code
9
Offset1
Used for offset adjustment of speed input
10
Offset2
Used for offset adjustment of steering input
11 VCC power
12
OSCO
Crystal oscillator output
13
OSCI
Crystal oscillator input
14 F/B Input for forward & backward speed
15 L/R Input for steering angle left & right
16 PC Power control output
PT0093(08/07)
3
Ver:3