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74LCX245 Datasheet

  • 74LCX245

  • LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER (3-STATE) WITH 5V TOL...

  • 13頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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74LCX245
LOW VOLTAGE CMOS OCTAL BUS TRANSCEIVER
(3-STATE) WITH 5V TOLERANT INPUTS AND OUTPUTS
s
s
s
s
s
s
s
s
s
s
5V TOLERANT INPUTS AND OUTPUTS
HIGH SPEED:
t
PD
= 7.0 ns (MAX.) at V
CC
= 3V
POWER DOWN PROTECTION ON INPUTS
AND OUTPUTS
SYMMETRICAL OUTPUT IMPEDANCE:
|I
OH
| = I
OL
= 24mA (MIN) at V
CC
= 3V
PCI BUS LEVELS GUARANTEED AT 24 mA
BALANCED PROPAGATION DELAYS:
t
PLH
鈮?/div>
t
PHL
OPERATING VOLTAGE RANGE:
V
CC
(OPR) = 2.0V to 3.6V (1.5V Data
Retention)
PIN AND FUNCTION COMPATIBLE WITH
74 SERIES 245
LATCH-UP PERFORMANCE EXCEEDS
500mA (JESD 17)
ESD PERFORMANCE:
HBM > 2000V (MIL STD 883 method 3015);
MM > 200V
SOP
TSSOP
Table 1: Order Codes
PACKAGE
SOP
TSSOP
T&R
74LCX245MTR
74LCX245TTR
DESCRIPTION
The 74LCX245 is a low voltage CMOS OCTAL
BUS TRANSCEIVER (3-STATE) fabricated with
sub-micron silicon gate and double-layer metal
wiring C
2
MOS technology. It is ideal for low power
and high speed 3.3V applications; it can be
interfaced to 5V signal environment for both inputs
and outputs.
Figure 1: Pin Connection And IEC Logic Symbols
It has same speed performance at 3.3V than 5V
AC/ACT family, combined with a lower power
consumption.
This IC is intended for two way asynchronous
communication between data buses; the direction
of data transmission is determined by DIR input.
The enable input G can be used to disable the
device so that the buses are effectively isolated.
All inputs and outputs are equipped with
protection circuits against static discharge, giving
them 2KV ESD immunity and transient excess
voltage.
All floating bus terminals during High Z state must
be held HIGH or LOW.
September 2004
Rev. 4
1/13

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