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參數資料
| 型號： | SN54HCT645W |
| 廠商： | Texas Instruments, Inc. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | 800mA, 2.85V Output, SCSI-2 Active Terminator, Low Dropout Voltage Regulator; Package: DPAK 4 LEAD Single Gauge Surface Mount; No of Pins: 4; Container: Tape and Reel; Qty per Container: 2500 |
| 中文描述： | 八路總線收發器與三態輸出 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 109K |
| 代理商： | SN54HCT645W |
SN54HCT645, SN74HCT645
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS019B – MARCH 1984 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Inputs Are TTL-Voltage Compatible
True Logic
High-Current 3-State Outputs Can Drive up
to 15 LSTTL Loads
Package Options Include Plastic
Small-Outline (DW) and Ceramic Flat (W)
Packages, Ceramic Chip Carriers (FK), and
Standard Plastic (N) and Ceramic (J)
300-mil DIPs
description
These octal bus transceivers are designed for
asynchronous two-way communication between
data buses. These devices transmit data from the
A bus to the B bus or from the B bus to the A bus,
depending upon the 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 SN54HCT645 is characterized for operation
over the full military temperature range of –55
°
C
to 125
°
C. The SN74HCT645 is characterized for
operation from –40
°
C to 85
°
C.
FUNCTION TABLE
INPUTS
OPERATION
OE
DIR
L
L
B data to A bus
L
H
A data to B bus
H
X
Isolation
Copyright
1997, Texas Instruments Incorporated
UNLESS OTHERWISE NOTED this document contains PRODUCTION
DATA information current as of publication date. Products conform to
specifications per the terms of Texas Instruments standard warranty.
parameters.
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.
SN54HCT645 . . . J OR W PACKAGE
SN74HCT645 . . . DW OR N PACKAGE
(TOP VIEW)
SN54HCT645 . . . FK PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
OE
B1
B2
B3
B4
B5
B6
B7
B8
3
2
1 20 19
9 10 11 12 13
4
5
6
7
8
18
17
16
15
14
B1
B2
B3
B4
B5
A3
A4
A5
A6
A7
A
A
D
B
B
O
A
G
B
V
C
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| SN54HCT74FK | Up-to-250kHz Flyback PWM Voltage-Mode Controller with Programmable Standby Mode; Package: PDIP-16; No of Pins: 16; Container: Rail; Qty per Container: 500 |
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