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16-BIT BUS TRANSCEIVER
WITH 3-STATE OUTPUTS
SCES062O – DECEMBER 1995 – REVISED JANUARY 2008
1
FEATURES
•
Member of the Texas Instruments Widebus™
Family
•
Operates From 1.65 V to 3.6 V
•
Inputs Accept Voltages to 5.5 V
•
Max t
pd
of 4 ns at 3.3 V
•
Typical V
OLP
(Output Ground Bounce)
<0.8 V at V
CC
= 3.3 V, T
A
= 25°C
•
Typical V
OHV
(Output V
OH
Undershoot)
>2 V at V
CC
= 3.3 V, T
A
= 25°C
•
Supports Mixed-Mode Signal Operation on All
Ports (5-V Input/Output Voltage With
3.3-V V
CC
)
•
I
off
Supports Partial-Power-Down Mode
Operation
•
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)
2
DGG, DGV, OR DL PACKAGE
(TOP VIEW)
1DIR
1B1
1B2
GND
1B3
1B4
V
CC
1B5
1B6
GND
1B7
1B8
2B1
2B2
GND
2B3
2B4
V
CC
2B5
2B6
GND
2B7
2B8
2DIR
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
1OE
1A1
1A2
GND
1A3
1A4
V
CC
1A5
1A6
GND
1A7
1A8
2A1
2A2
GND
2A3
2A4
V
CC
2A5
2A6
GND
2A7
2A8
2OE
DESCRIPTION/ORDERING INFORMATION
This 16-bit (dual-octal) noninverting bus transceiver is designed for 1.65-V to 3.6-V V
CC
operation.
The SN74LVC16245A is designed for asynchronous communication between data buses. The control-function
implementation minimizes external timing requirements.
This device can be used as two 8-bit transceivers or one 16-bit transceiver. It allows data transmission 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 that the buses are effectively isolated.
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.
Inputs can be driven from either 3.3-V or 5-V devices. This feature allows the use of this device as a translator in
a mixed 3.3-V/5-V system environment.
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.
1
2
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.
Widebus is a trademark of Texas Instruments.
Copyright © 1995–2008, Texas Instruments Incorporated
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.
TI [ TEXAS INSTRUMENTS ]
