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參數(shù)資料
| 型號： | SN54HCT652W |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Dual EIA-423/EIA-232D Line Driver; Package: 8 LEAD PDIP; No of Pins: 8; Container: Rail; Qty per Container: 50 |
| 中文描述： | 八路總線收發(fā)器和寄存器具有三態(tài)輸出 |
| 文件頁數(shù)： | 1/8頁 |
| 文件大小： | 152K |
| 代理商： | SN54HCT652W |
SN54HCT652, SN74HCT652
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCLS179B – MARCH 1984 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Inputs Are TTL-Voltage Compatible
Independent Registers and Enables for A
and B Buses
Multiplexed Real-Time and Stored Data
True Data Paths
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 (NT) and Ceramic (JT)
300-mil DIPs
description
The ’HCT652 consist of bus-transceiver circuits,
D-type flip-flops, and control circuitry arranged for
multiplexed transmission of data directly from the
data bus or from the internal storage registers.
Output-enable (OEAB and OEBA) inputs are
provided to control the transceiver functions.
Select-control (SAB and SBA) inputs are provided
to select real-time or stored data transfer. A low
input level selects real-time data; a high input level
selects stored data. Figure 1 illustrates the four
fundamental bus-management functions that can
be performed with the ’HCT652.
Data on the A or B data bus, or both, can be stored
in the internal D-type flip-flops by low-to-high
transitions at the appropriate clock (CLKAB or
CLKBA) terminals regardless of the select- or
output-control terminals. When SAB and SBA are
in the real-time transfer mode, it is possible to
store data without using the internal D-type
flip-flops by simultaneously enabling OEAB and
OEBA. In this configuration, each output
reinforces its input. When all other data sources to
the two sets of bus lines are at high impedance,
each set of bus lines remains at its last state.
The SN54HCT652 is characterized for operation over the full military temperature range of –55
°
C to 125
°
C.
The SN74HCT652 is characterized for operation from –40
°
C to 85
°
C.
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.
SN54HCT652 . . . JT OR W PACKAGE
SN74HCT652 . . . DW OR NT PACKAGE
(TOP VIEW)
SN54HCT652 . . . FK PACKAGE
(TOP VIEW)
NC – No internal connection
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
CLKAB
SAB
OEAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
V
CC
CLKBA
SBA
OEBA
B1
B2
B3
B4
B5
B6
B7
B8
3 2 1
13 14
5
6
7
8
9
10
11
OEBA
B1
B2
NC
B3
B4
B5
A1
A2
A3
NC
A4
A5
A6
4
15 16 17 18
A
G
N
B
B
B
O
S
C
N
28 27 2625
24
23
22
21
20
19
12
A
C
S
V
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