Ic Block Digrams; Main; 74Cx244; Pin Connection And Iec Logic Symbols - Samsung HT-DL200 Service Manual

8. IC Block Digrams

8-1 Main

1. 74CX244

LOW VOLTAGE CMOS OCTAL BUS BUFFER (3-STATE)
5V TOLERANT INPUTS AND OUTPUTS
HIGH SPEED:
t = 6.5 ns (MAX.) at V
PD
POWER-DOWN PROTECTION ON INPUTS
AND OUTPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|I | = I = 24 mA (MIN)
OH OL
PCI BUS LEVELS GUARANTEED AT 24mA
BALANCED PROPAGATION DELAYS:
≅ t
t
PLH PHL
OPERATING VOLTAGE RANGE:
V (OPR) = 2.0V to 3.6V (1.5V Data Retention)
CC
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 244
LATCH-UP PERFORMANCE EXCEEDS 500mA
ESD PERFORMANCE:
HBM >2000V; MM > 200V
DESCRIPTION
The LCX244 is a low voltage CMOS OCTAL BUS
BUFFER (NON-INVERTED)
sub-micron silicon gate and double-layer metal
2
wiring C MOS technology. It is ideal for low
power and high speed 3.3V applications; it can
be interfaced to 5V signal environment for both

PIN CONNECTION AND IEC LOGIC SYMBOLS

Samsung Electronics
WITH 5V TOLERANT INPUTS AND OUTPUTS
= 3V
CC
fabricated
M
(Micro Package)
74LCX244M
inputs and outputs.
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
This device is designed to be used with 3 state
memory address drivers, etc.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
with
them 2KV ESD immunity and transient excess
voltage.
T
(TSSOP Package)
ORDER CODES :
74LCX244T
8-1