pt8a990p Pericom Technology Inc, pt8a990p Datasheet - Page 5

• Manufacturer Part Number: pt8a990p
• Description: 9-function Remote Controller
• Manufacturer: Pericom Technology Inc

PT0053(15/03/01)
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Functional Description
In normal operation without ‘Turbo’, forward (backward) out-
put pin of the decoder PT8A991P sends out a 60Hz signal. In
operation with ‘Forward (Backward)’ and ‘Turbo’ combined,
the output signal will be completely high. This function is de-
picted as follows.
Once a key is pressed, the PT8A990P is powered on, and the
PC output pin keeps on a high level. If no key pressed, The
PT8A990P will shut off automatically in 2s and nothing is
output on the PC pin. It can save battery power by shutting
down the device after pressing on any key for 4 minutes. The
PC pin is used to control on/off of the external power supply.
The PT8A991P has Auto Power Down feature when no signal
received within 5 minutes. The VT pins are used for Current
Limit Protection to meet HD271 Toys safety standard. There
are two over- current-protection pins in PT8A991P. If the in-
put voltage is over 0.095V
will be off. The LRTD/VT2 is optional.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested)
Figure 4. Data Format
Storage Temperature ........................................................ -25
Ambient Temperature with Power Applied ......................... 0
Supply Voltage to Ground Potential (Inputs & V
Supply Voltage to Ground Potential (Outputs & D/O Only) -0.5 to +5.5V
DC Input Voltage ................................................................ -0.5 to +5.5V
DC Output Current ........................................................................ 20mA
Power Dissipation ....................................................................... 500mW
CC
"1"
"0"
for 3 seconds, the output level
CC
Only) .... -0.5 to +5.5V
o
o
Frequency: 500Hz, Duty Cycle: 3/4
Frequency: 500Hz, Duty Cycle: 1/4
C to +85
C to +70
5
Data Format
See Figure 4.
Coding Method
Each trigger pin is triggered by corresponding bit of data in
format of “1”. The data string is 18-bit and divided to four
segments, i.e., Start Code, Data Code, Parity Code and End
code, where
Data code can be any combination of F, B, T, R, L, F1, F2, F3
and F4 except F&B, R&L, N1 and N2.
Start Code = 11110.
Data Code = F3 F4 F B T R L F1 N1 N2 F2
Parity Code = Even parity check result
End Code is for data latch.
F = Forward
R = Right
F2 = Function 2
o
o
C
C
Note:
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the
device. This is a stress rating only and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure
to absolute maximum rating conditions for extended
periods may affect reliability.
9-Function Remote Controller
B = Backward
L = Left
F3 = Function 3
N1, N2 = Reserved
PT8A990P/991P
T = Turbo
F1= Function 1
F4 = Function 4
Data Sheet
Ver:2