SN74LVCZ244A
OCTAL BUFFER/DRIVER
WITH 3-STATE OUTPUTS
SCES274B – JUNE 1999 – REVISED JANUARY 2000
DB, DGV, DW, OR PW PACKAGE
(TOP VIEW)
EPIC (Enhanced-Performance Implanted
CMOS) Submicron Process
Typical V
<0.8 V at V
(Output Ground Bounce)
OLP
CC
1OE
1A1
2Y4
1A2
2Y3
1A3
2Y2
1A4
2Y1
GND
V
CC
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
= 3.3 V, T = 25°C
A
2OE
1Y1
2A4
1Y2
2A3
1Y3
Typical V
(Output V
Undershoot) >2 V
OHV
OH
at V
= 3.3 V, T = 25°C
CC
A
I
and Power-Up 3-State Support Hot
off
Insertion
Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
13 2A2
12 1Y4
3.3-V V
)
CC
11
2A1
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
Package Options Include Shrink
Small-Outline (DB), Plastic Thin Very
Small-Outline (DGV), Small-Outline (DW),
and Thin Shrink Small-Outline (PW)
Packages
description
This octal buffer/line driver is designed for 2.7-V to 3.6-V V
operation.
CC
The SN74LVCZ244A is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE
is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the
high-impedance state.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of these devices as translators
in a mixed 3.3-V/5-V system environment.
When V
is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down.
CC
However, to ensure the high-impedance state above 1.5 V, OE should be tied to V
the minimum value of the resistor is determined by the current-sinking capability of the driver.
through a pullup resistor;
CC
This device is fully specified for hot-insertion applications using I and power-up 3-state. The I circuitry
off
off
disables the outputs, preventing damaging current backflow through the device when it is powered down. The
power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
The SN74LVCZ244A is characterized for operation from –40°C to 85°C.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
EPIC is a trademark of Texas Instruments Incorporated.
Copyright 2000, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
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