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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)
DB, DW, OR PW PACKAGE
(TOP VIEW)
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.
<br/>
(5 V) V
CCA
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
V
CCB
(3.3 V)
V
CCB
(3.3 V)
OE
B1
B2
B3
B4
B5
B6
B7
B8
GND
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.
ORDERING INFORMATION
T
A
SOIC – DW
–40°C to 85°C
SSOP – DB
TSSOP – PW
PACKAGE
(1)
Tube of 25
Reel of 2000
Reel of 2000
Tube of 60
Reel of 2000
Reel of 250
(1)
ORDERABLE PART NUMBER
SN74LVC4245ADW
SN74LVC4245ADWR
SN74LVC4245ADBR
SN74LVC4245APW
SN74LVC4245APWR
SN74LVC4245APWT
LJ245A
TOP-SIDE MARKING
LVC4245A
LJ245A
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at
www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OE
L
L
H
DIR
L
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
TI [ TEXAS INSTRUMENTS ]
