74Lvc541; Saa3010T - Hitachi 15LD2200 Service Manual

3.14. 74LVC541

The 74LVC541A is an octal non-inverting buffer/line driver with 5V tolerant inputs/outputs. The 3-state outputs are controlled
by the output enable inputs OE1and OE2.
•
5 V tolerant inputs/outputs; for interfacing with 5V logic
•
Wide supply voltage range from 2.7 to 3.6V
•
CMOS low-power consumption
•
Direct interface with TTL levels

3.15. SAA3010T

The SAA3010 is intended as a general purpose (RC-5) infrared remote control system for use where a low voltage supply and a
large debounce time are expected. The device can generate 2048 different commands and utilizes a keyboard with a single pole
switch for each key. The commands are arranged so that 32 systems can be addressed, each system containing 64 different
commands. The circuit response to legal (one key pressed at a time) and illegal (more than one key pressed at a time) keyboard
operation is specified in the section "Keyboard operation".
•
Low voltage requirement
•
Biphase transmission technique
•
Single pin oscillator
•
Test mode facility
Pin Mnemonic
1 X7 (IPU)
2 SSM (I)
3 Z0-Z3 (IPU)
7 MDATA (OP3)
8 DATA (OP3)
9-13 DR7-DR3
(ODN)
14 VSS
15-17 DR-2-DR0
(ODN)
18 OSC (I)
19 TP2 (I)
20 TP1 (I)
21-27 X0-X6 (IPU)
28 VDD(I)
15" TFT TV Service Manual
INPUT
OE1 OE2
L L
L L
X H
H X
Pin no Symbol
1
OE1
2, 3, 4, 5, 6, 7, A0 to A7
8, 9
11, 12, 13, 14, Y0 to Y7
15, 16, 17, 18
2A1 to 2A4
1Y1 to 1Y4
19
OE2
10 GND
20 VCC
Function
sense input from key matrix
sense mode selection input
sense inputs from key matrix
generated output data modulated with 1/12 the oscillator frequency at a 25%
duty factor
generated output information
Scan drivers
Ground (0V)
Scan drivers
Oscillator input
test point 2
Test point 1
Sense inputs from key matrix
Voltage supply
OUTPUT
An Yn
L L
H H
X Z
X Z
Name and function
Output Enable Input
Data Inputs
Data Outputs
Data Inputs
Data Outputs
Output Enable Input
Ground (0V)
Positive Supply Voltage
27