SN74LVCZ245A
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES275G – JUNE 1999 – REVISED AUGUST 2003
DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
Operates From 2.7 V to 3.6 V
Inputs Accept Voltages to 5.5 V
Max t of 6.3 ns at 3.3 V
pd
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
Typical V
<0.8 V at V
(Output Ground Bounce)
OLP
CC
A2
= 3.3 V, T = 25°C
A
A3
Typical V
(Output V
Undershoot)
OHV
OH
A4
>2 V at V
= 3.3 V, T = 25°C
CC
A
A5
I
and Power-Up 3-State Support Hot
off
A6
Insertion
A7
Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
A8
GND
3.3-V V
)
CC
Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
description/ordering information
This octal bus transceiver is designed for 2.7-V to 3.6-V V
operation.
CC
The SN74LVCZ245A is designed for asynchronous communication between data buses. The device transmits
data from the A bus to the B bus or from the B bus to the A bus, depending on the logic level at the
direction-control (DIR) input. The output-enable (OE) input can be used to disable the device so the buses are
effectively isolated.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator
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.
ORDERING INFORMATION
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
†
PACKAGE
T
A
PDIP – N
Tube of 20
SN74LVCZ245AN
SN74LVCZ245AN
Tube of 25
SN74LVCZ245ADW
SN74LVCZ245ADWR
SN74LVCZ245ANSR
SN74LVCZ245ADBR
SN74LVCZ245APW
SN74LVCZ245APWR
SOIC – DW
LVCZ245A
Reel of 2000
Reel of 2000
Reel of 2000
Tube of 70
SOP – NS
LVCZ245A
CV245A
CV245A
CV245A
–40°C to 85°C
SSOP – DB
TSSOP – PW
Reel of 2000
Reel of 250
SN74LVCZ245APWT
CV245A
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines
are available at www.ti.com/sc/package.
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.
Copyright 2003, 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
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265