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參數(shù)資料
| 型號： | SNJ54ALVTHR16245W |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 通用總線功能 |
| 英文描述： | 2.5-V/3.3-V 16-BIT BUS TRANSCEIVERS WITH 3-STATE OUTPUTS |
| 中文描述： | 2.5-V/3.3-V 16位總線收發(fā)器與三態(tài)輸出 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 397K |
| 代理商： | SNJ54ALVTHR16245W |
SN54ALVTHR16245, SN74ALVTHR16245
2.5-V/3.3-V 16-BIT BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCES075D
–
JUNE 1996
–
REVISED DECEMBER 2002
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
These devices can be used as two 8-bit transceivers or one 16-bit transceiver. They allow 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.
All outputs are designed to sink up to 12 mA, and include equivalent 30-
resistors to reduce overshoot and
undershoot.
These devices are fully specified for hot-insertion applications using I
off
and power-up 3-state. The I
off
circuitry
disables the outputs, preventing damaging current backflow through the device when it is powered down. The
power-up 3-state circuitry places the outputs in the high-impedance state during power up and power down,
which prevents driver conflict.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level. Use of pullup
or pulldown resistors with the bus-hold circuitry is not recommended.
When V
CC
is between 0 and 1.2 V, the device is in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.2 V, 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.
terminal assignments
1
2
3
4
5
6
A
1DIR
NC
NC
NC
NC
1OE
B
1B2
1B1
GND
GND
1A1
1A2
C
1B4
1B3
VCC
GND
VCC
GND
1A3
1A4
D
E
F
1B6
1B5
1A5
1A6
1B8
1B7
1A7
1A8
2B1
2B2
2A2
2A1
G
2B3
2B4
GND
GND
2A4
2A3
H
2B5
2B6
VCC
GND
VCC
GND
2A6
2A5
J
2B7
2B8
2A8
2A7
K
2DIR
NC
NC
NC
NC
2OE
NC
–
No internal connection
FUNCTION TABLE
(each 8-bit section)
INPUTS
OE
OPERATION
DIR
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
SN74ALVTHR16245 . . . GQL PACKAGE
(TOP VIEW)
J
H
G
F
E
D
C
B
A
2
1
3
4
6
5
K
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