參數(shù)資料
型號: SNJ54LVTH125FK
廠商: TEXAS INSTRUMENTS INC
元件分類: 總線收發(fā)器
英文描述: LVT SERIES, QUAD 1-BIT DRIVER, TRUE OUTPUT, CQCC20
封裝: CERAMIC, LCC-20
文件頁數(shù): 12/21頁
文件大小: 770K
代理商: SNJ54LVTH125FK
SN54LVTH125, SN74LVTH125
3.3V ABT QUADRUPLE BUS BUFFERS
WITH 3STATE OUTPUTS
SCBS703I AUGUST 1997 REVISED OCTOBER 2003
2
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
description/ordering information (continued)
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.
When VCC is between 0 and 1.5 V, the devices are in the high-impedance state during power up or power down.
However, to ensure the high-impedance state above 1.5 V, OE should be tied to VCC through a pullup resistor;
the minimum value of the resistor is determined by the current-sinking capability of the driver.
These devices are fully specified for hot-insertion applications using Ioff and power-up 3-state. The Ioff circuitry
disables the outputs, preventing damaging current backflow through the devices when they are 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.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE
A
OUTPUT
Y
L
H
L
LL
H
X
Z
logic diagram (positive logic)
1
1OE
2
1A
1Y
3
4
2OE
5
2A
2Y
6
10
3OE
9
3A
3Y
8
13
4OE
12
4A
4Y
11
Pin numbers shown are for the D, DB, DGV, J, NS, PW, RGY, and W packages.
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