SN74AVC4T245_07 Datasheet, PDF (1/24 Pages) Texas Instruments – 4-BIT DUAL-SUPPLY BUS TRANSCEIVER WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS

SN74AVC4T245
4ĆBIT DUALĆSUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3ĆSTATE OUTPUTS
SCES576A – JUNE 2004 – REVISED APRIL 2005
D Control Inputs V_IH/V_IL Levels are
Referenced to V_CCA Voltage
D Fully Configurable Dual-Rail Design Allows
Each Port to Operate Over the Full 1.2-V to
3.6-V Power-Supply Range
D, DGV, OR PW PACKAGE
(TOP VIEW)
D I/Os Are 4.6-V Tolerant
D I_off Supports Partial-Power-Down Mode
Operation
D Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
D ESD Protection Exceeds JESD 22
− 8000-V Human-Body Model (A114-A)
− 150-V Machine Model (A115-A)
− 1000-V Charged-Device Model (C101)
RGY PACKAGE
(TOP VIEW)
V_{CCA 1}
1DIR 2
2DIR 3
1A1 4
1A2 5
2A1 6
2A2 7
GND 8
16 ^V_CCB
15 1OE
14 2OE
13 1B1
12 1B2
11 2B1
10 2B2
9 GND
1
1DIR 2
2DIR 3
1A1 4
1A2 5
2A1 6
2A2 7
8
16
15 1OE
14 2OE
13 1B1
12 1B2
11 2B1
10 2B2
9
description/ordering information
This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is
designed to track V_CCA. V_CCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track
V_CCB. V_CCB accepts any supply voltage from 1.2 V to 3.6 V. The SN74AVC4T245 is optimized to operate with
V_CCA/V_CCB set at 1.4 V to 3.6 V. It is operational with V_CCA/V_CCB as low as 1.2 V. This allows for universal
low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, and 3.3-V voltage nodes.
The SN74AVC4T245 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 outputs so the buses are
effectively isolated.
The SN74AVC4T245 is designed so that the control pins (1DIR, 2DIR, 1OE, and 2OE) are supplied by V_CCA.
This device is fully specified for partial-power-down applications using I_off. The I_off circuitry disables the outputs,
preventing damaging current backflow through the device when it is powered down.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright  2005, Texas Instruments Incorporated
1