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參數(shù)資料
| 型號： | SN74CBTH3383 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | 10-Bit Bus-Exchange Swiches(10位總線交換開關(guān)(總線保持)) |
| 中文描述： | 10位總線交換Swiches（10位總線交換開關(guān)（總線保持）） |
| 文件頁數(shù)： | 1/5頁 |
| 文件大小： | 97K |
| 代理商： | SN74CBTH3383 |
SN74CBTH3383
10-BIT BUS-EXCHANGE SWITCH
WITH BUS HOLD
SCDS023E – MAY 1995 – REVISED AUGUST 1996
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Functionally Equivalent to QS3388
5-
Switch Connection Between Two Ports
TTL-Compatible Input and Output Levels
Bus Hold on Data Inputs Eliminates the
Need for External Pullup/Pulldown
Resistors
Package Options Include Plastic
Small-Outline (DW), Shrink Small-Outline
(DB), and Thin Shrink Small-Outline (PW)
Packages
description
The SN74CBTH3383 provides ten bits of
high-speed TTL-compatible bus switching or
exchanging with bus hold on all I/Os. The low
on-state resistance of the switch allows connection to be made with minimal propagation delay. When the switch
is turned off, the bus-hold circuit pulls all I/Os to V
CC
or to GND, depending on the last-known state of the pin.
The bus-hold feature holds unused buses in a known TTL state, away from threshold. The bus-hold circuit can
hold the bus in the last-known state as long as its leakage does not exceed 100
μ
A. If the leakage on the bus
exceeds this value, the bus hold switches states. The bus-hold feature is active only when the SN74CBTH3383
I/Os are in the high-impedance state.
The device operates as a 10-bit bus switch or a 5-bit bus exchanger, which provides swapping of the A and B
pairs of signals. The bus-exchange function is selected when BE is low. The switches are open when BE is high.
Active bus-hold circuitry is provided to hold unused or floating data inputs at a valid logic level.
The SN74CBTH3383 is available in TI’s shrink small-outline (DB) and thin shrink small-outline (PW) package,
which provide the same I/O pin count and functionality of standard small-outline packages in less than half the
printed-circuit-board area.
The SN74CBTH3383 is characterized for operation from –40
°
C to 85
°
C.
FUNCTION TABLE
BE
BX
1A1–5A1
1A2–5A2
L
L
1B1–5B1
1B2–5B2
L
H
1B2–5B2
1B1–5B1
H
X
Z
Z
BE
1B1
1A1
1A2
1B2
2B1
2A1
2A2
2B2
3B1
3A1
GND
DB, DW, OR PW PACKAGE
(TOP VIEW)
V
CC
5B2
5A2
5A1
5B1
4B2
4A2
4A1
4B1
3B2
3A2
BX
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
PRODUCT PREVIEW information concerns products in the formative or
design phase of development. Characteristic data and other
specifications are design goals. Texas Instruments reserves the right to
change or discontinue these products without notice.
Copyright
1996, Texas Instruments Incorporated
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.
P
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