SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS

SCAS375D – MARCH 1994 – REVISED JUNE 1998
1POST OFFICE BOX 655303 ? DALLAS, TEXAS 75265
C0068 EPIC? (Enhanced-Performance Implanted
CMOS) Submicron Process
C0068 3.3-V to 5-V Bidirectional Level Shifter
C0068 Latch-Up Performance Exceeds 250 mA Per
JESD 17
C0068 Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
This 8-bit (octal) noninverting bus transceiver
contains two separate supply rails; B port has
V
CCB
, which is set at 3.3 V, and A port has V
CCA
,
which is set at 5 V. This allows for translation from
a 3.3-V to a 5-V environment, and vice versa.
The SN74LVC4245A 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.
The SN74LVC4245A pinout allows the designer to switch to a normal all-3.3-V or all-5-V 20-pin ’245 device
without board re-layout. The designer uses the data paths for pins 2–11 and 14–23 of the SN74LVC4245A to
align with the conventional ’245 pinout.
The SN74LVC4245A is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
INPUTS
OPERATION
OE DIR
L L B data to A bus
L H A data to B bus
H X Isolation
Copyright ? 1998, Texas Instruments Incorporated
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.
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.
DB, DW, OR PW PACKAGE