SN74ALVCH245_07 Datasheet, PDF (1/14 Pages) Texas Instruments – OCTAL BUS TRANSCEIVER WITH 3-STATE OUTPUTS

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SN74ALVCH245
OCTAL BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES119G – JULY 1997 – REVISED SEPTEMBER 2004
FEATURES
• Operates From 1.65 V to 3.6 V
• Max t_pd of 3.4 ns at 3.3 V
• ±24-mA Output Drive at 3.3 V
• Bus Hold on Data Inputs Eliminates the Need
for External Pullup/Pulldown Resistors
• Latch-Up Performance Exceeds 100 mA Per
JESD 78, Class II
DESCRIPTION/ORDERING INFORMATION
This octal bus transceiver is designed for 1.65-V to
3.6-V V_CC operation.
DGV, DW, 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
The SN74ALVCH245 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.
<br/>
To ensure the high-impedance state during power up or power down, 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.
Active bus-hold circuitry holds unused or undriven inputs at a valid logic state. Use of pullup or pulldown resistors
with the bus-hold circuitry is not recommended.
T_A
-40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
SOIC - DW
Tube
Tape and reel
SN74ALVCH245DW
SN74ALVCH245DWR
SOP - NS
Tape and reel
SN74ALVCH245NSR
TSSOP - PW
Tube
Tape and reel
SN74ALVCH245PW
SN74ALVCH245PWR
TVSOP - DGV
Tape and reel
SN74ALVCH245DGVR
TOP-SIDE MARKING
ALVCH245
ALVCH245
VB245
VB245
(1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OE DIR
L
L
L
H
H
X
OPERATION
B data to A bus
A data to B bus
Isolation
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 the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1997–2004, Texas Instruments Incorporated