PT8A977P Pericom Semiconductor, PT8A977P Datasheet

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PT8A977P

Manufacturer Part Number
PT8A977P
Description
Manufacturer
Pericom Semiconductor
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
Part Number:
PT8A977P
Manufacturer:
PT
Quantity:
20 000
Features
• PT8A977P/977W works as encoder and
• Five pins for five control functions
• Operating power-supply voltage: 2.5V to 5.0V
• Auto-power-off if no press on any button in 8s or
• Press on any button as wake up (977P, 977W)
• Manual-power-off with OFF button
• One output pin used for external power control (977P,
• On-chip oscillator with an external resistor
• On-chip reversing amplifiers (978P, 978LW)
• Low operating current
• Few external components needed
• Package: 14-pin DIP, 14-pin SOIC, 16-pin DIP
Ordering Information
PT0074(10/01)
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PT8A978P/978LW works as decoder
(977P, 977W, 978P), 2.0V to 5.0V (978LW)
continuously press on any button over 4 minues
977W)
and 16-pin SOIC
P
P
P
P
T
T
P
P
P
P
P
T
T
8
a
a
a
8
a
a
8
8
A
t r
t r
t r
t r
t r
A
A
A
9
9
9
9
7
N
N
N
N
N
7
7
7
8
7
. o
. o
. o
. o
. o
7
8
L
W
P
P
W
1
1
1
1
4
6
P
P
P
P
P
4
6
p -
p -
a
a
a
p -
p -
a
a
k c
k c
k c
k c
k c
n i
n i
n i
n i
a
a
a
a
a
S
S
D
D
e g
e g
e g
e g
e g
O
O
P I
P I
I
I
C
C
1
General Description
The PTA977P (or 977W) and PT8A978P (or 978LW)
provide a complete control functions to the remote-
controlled toy. The PT8A977P/977W has five input
pins corresponding with the five function buttons i.e,
forward, backward, rightward, leftward and turbo. The
encoding circuit in the PT8A977P/977W sends digital
codes to the two output pins SO and SC. The digital
codes correspond to the definite function buttons or
their combinations. The SO and SC outputs are used
in wireless and infra-red applications respectively.
The PT8A978P (or 978LW) has five output pins
corresponding with the five actions. The received
signals are amplified by the three-stage amplifier, and
then the appropriate amplified signals are sampled,
fault-tolerantly checked and decoded to control the
actions of the remote-controlled toy.
There is an internal oscillator in the PT8A977P/977W
and 978P/978LW respectively. By adding an external
resistor conveniently, the oscillator will be
constructed. The oscillator frequency can be adjusted
by the external resistor. The relative error between
the frequencies of the two on-chip oscillators in the
PT8A977P/977W and PT8A978P/978LW must be
less than ±25%.
The auto-power-off function is achieved by an internal
counter. The PC output is used to control on/off state
of the external power supply. Pressing OFF button
can also shut down the power supply. Press on any
function button will wake up the chip promptly.
PT8A977P/977W/978P/978LW
5-Function Remote Controller
Data Sheet
Ver:1

Related parts for PT8A977P

PT8A977P Summary of contents

Page 1

... There is an internal oscillator in the PT8A977P/977W and 978P/978LW respectively. By adding an external resistor conveniently, the oscillator will ...

Page 2

... VI2 Pin Configuration PT8A977P/977W 14-Pin DIP/14-Pin SOIC 1 Right Test 2 GND 3 4 Backward Forward 5 6 Turbo 7 SC PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller Timing Oscillator Generator Output Encoding Input Circuit Circuit Circuit Timing Latch Generator Signal Sample & Decoding Fault-Tolerant Circuit Check ...

Page 3

... VI1 VO1 15 16 VI2 PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller Description With Pull-up resistor, rightward function selected if this pin connected to GND. With Pull-up resistor, this pin is used for testing mode. Negative power supply With Pull-up resistor, backward function selected if this pin connected to GND. ...

Page 4

... W2 for start codes) Word Format Start Code: 4W2 Encoding and Decoding Timing W2, W2, W2, W2, (n)xW1, W2, W2, W2, W2, (n)xW1, W2, W2, W2, W2, (n)xW1, W2, W2, W2, W2, (n)xW1, Press Any Button on PT8A977P/977W Encoding Output from PT8A977P/977W Decoding Output from PT8A978P (or 978LW) ...

Page 5

... CC OFF PC 8s Note: Pins and 14 are High Press Function buttons PC PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller Decoding Results End Code Forward (Pulse) Forward (High level) Turbo Forward (High level) & Left Forward (High level) & Right Backward Backward & Right Backward & ...

Page 6

... Pin Output Low Current OL Pin 6, 7, 10, 11, 12 Pin Output High Current OH Pin 6, 7, 10, 11, 12 Note: Over the Operating Rating, 0°C £ T PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller Note + Stresses greater than those listed under MAXIMUM +40 C RATINGS may cause permanent damage to the Only) ...

Page 7

... OFF Note: Over the Operating Rating, 0°C £ The relative error between the frequencies of the two on-chip oscillators in the PT8A977P (or 977W) and PT8A978P (or 978LW) must be less than ±25%. ** When adjust the external oscillator resistor, the auto-power-off time will vary relevantly. AC Electrical Characteristics of 978P/978LW ...

Page 8

... Application Circuits Typical Application of PT8A977P/977W For Transmit Circuit With 9V Battery PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller Turbo CC PC Forward OSCO Backward OSCI GND OFF Test Left Right 8 Data Sheet Ver:1 ...

Page 9

... Typical Application of PT8A978P/978LW For Receive Circuit With Five Functions PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller Backward Left Forward Right Turbo OSCO OSCI VI1 VO1 GND VI2 ...

Page 10

... Mechanical Diagram of 14-pin SOIC PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller 10 Data Sheet Ver:1 ...

Page 11

... Mechanical Diagram of 16-pin SOIC PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller 11 Data Sheet Ver:1 ...

Page 12

... Pericom Technology does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom Technology product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom Technology Incorporation. PT0074(10/01) PT8A977P/977W/978P/978LW 5-Function Remote Controller Notes Pericom Technology Inc. ...

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