SN74LVC4245A_08 Datasheet, PDF (1/15 Pages) Texas Instruments – OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER WITH 3-STATE OUTPUTS

www.ti.com
SN74LVC4245A
OCTAL BUS TRANSCEIVER AND 3.3-V TO 5-V SHIFTER
WITH 3-STATE OUTPUTS
SCAS375H – MARCH 1994 – REVISED MARCH 2005
FEATURES
• Bidirectional Voltage Translator
• 5.5 V on A Port and 2.7 V to 3.6 V on B Port
• Control Inputs V_IH/V_IL Levels Are Referenced
to V_CCA Voltage
• Latch-Up Performance Exceeds 250 mA Per
JESD 17
• ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
– 1000-V Charged-Device Model (C101)
DESCRIPTION/ORDERING INFORMATION
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.
DB, DW, OR PW PACKAGE
(TOP VIEW)
(5 V) V_CCA 1
DIR 2
A1 ³
A2 4
A3 5
A4 6
A5 7
A6 ⁸
A7 ⁹
A8 ¹⁰
GND 11
GND 12
24 V_CCB (3.3 V)
23 V_CCB (3.3 V)
22 _OE
21 B1
20 B2
19 B3
18 B4
17 _B5
16 _B6
15 _B7
14 B8
13 GND
<br/>
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 control circuitry (DIR, OE) is powered by V_CCA.
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.
T_A
–40°C to 85°C
ORDERING INFORMATION
PACKAGE ⁽¹⁾
ORDERABLE PART NUMBER
SOIC – DW
Tube of 25
Reel of 2000
SN74LVC4245ADW
SN74LVC4245ADWR
SSOP – DB
Reel of 2000
SN74LVC4245ADBR
Tube of 60
SN74LVC4245APW
TSSOP – PW
Reel of 2000
SN74LVC4245APWR
Reel of 250
SN74LVC4245APWT
TOP-SIDE MARKING
LVC4245A
LJ245A
LJ245A
(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 © 1994–2005, Texas Instruments Incorporated