SN74LVCZ245A_08 Datasheet, PDF (1/15 Pages) Texas Instruments – OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

D Operates From 2.7 V to 3.6 V
D Inputs Accept Voltages to 5.5 V
D Max t_pd of 6.3 ns at 3.3 V
D Typical V_OLP (Output Ground Bounce)
<0.8 V at V_CC = 3.3 V, T_A = 25°C
D Typical V_OHV (Output V_OH Undershoot)
>2 V at V_CC = 3.3 V, T_A = 25°C
D I_off and Power-Up 3-State Support Hot
Insertion
D Supports Mixed-Mode Signal Operation on
All Ports (5-V Input/Output Voltage With
3.3-V V_CC)
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
SN74LVCZ245A
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES275G – JUNE 1999 – REVISED AUGUST 2003
DB, DW, N, NS, OR PW PACKAGE
(TOP VIEW)
DIR 1
A1 2
A2 3
A3 4
A4 5
A5 6
A6 7
A7 8
A8 9
GND ¹⁰
20 V_CC
19 OE
18 B1
17 B2
16 B3
15 B4
14 B5
13 B6
12 B7
11 _B8
description/ordering information
This octal bus transceiver is designed for 2.7-V to 3.6-V V_CC operation.
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_CC is between 0 and 1.5 V, the device is in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, OE should be tied to V_CC through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the driver.
This device is fully specified for hot-insertion applications using I_off and power-up 3-state. The I_off circuitry
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
TA
PACKAGE†
ORDERABLE
PART NUMBER
TOP-SIDE
MARKING
PDIP – N
Tube of 20
SN74LVCZ245AN
SN74LVCZ245AN
SOIC – DW
Tube of 25
Reel of 2000
SN74LVCZ245ADW
SN74LVCZ245ADWR
LVCZ245A
SOP – NS
–40°C to 85°C
SSOP – DB
Reel of 2000
Reel of 2000
SN74LVCZ245ANSR
SN74LVCZ245ADBR
LVCZ245A
CV245A
Tube of 70
SN74LVCZ245APW
CV245A
TSSOP – PW Reel of 2000 SN74LVCZ245APWR
CV245A
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.
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.
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Copyright  2003, Texas Instruments Incorporated
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