- 您现在的位置：买卖IC网 > PDF目录97049 > SN54HC646JT (TEXAS INSTRUMENTS INC) HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CDIP24 PDF资料下载
参数资料
| 型号： | SN54HC646JT |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 总线收发器 |
| 英文描述： | HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CDIP24 |
| 封装： | 0.300 INCH, CERAMIC, DIP-24 |
| 文件页数： | 1/10页 |
| 文件大小： | 175K |
| 代理商： | SN54HC646JT |
SN54HC646, SN74HC646
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCLS150B – DECEMBER 1982 – REVISED MAY 1997
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
D Independent Registers for A and B Buses
D Multiplexed Real-Time and Stored Data
D True Data Paths
D High-Current 3-State Outputs Can Drive up
to 15 LSTTL Loads
D 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 ’HC646 consist of bus-transceiver circuits
with 3-state outputs, D-type flip-flops, and control
circuitry arranged for multiplexed transmission of
data directly from the input bus or from the internal
registers. Data on the A or B bus is clocked into the
registers on the low-to-high transition of the
appropriate clock (CLKAB or CLKBA) input.
Figure 1 illustrates the four fundamental bus-
management functions that can be performed
with the ’HC646.
Output-enable (OE) and direction-control (DIR)
inputs control the transceiver functions. In the
transceiver
mode,
data
present
at
the
high-impedance port may be stored in either or
both registers.
The select-control (SAB and SBA) inputs can
multiplex stored and real-time (transparent mode)
data. DIR determines which bus receives data
when OE is active (low). In the isolation mode (OE
high), A data may be stored in one register and /or
B data may be stored in the other register.
When an output function is disabled, the input function is still enabled and can be used to store and transmit
data. Only one of the two buses, A or B, may be driven at a time.
The SN54HC646 is characterized for operation over the full military temperature range of – 55
°C to 125°C. The
SN74HC646 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.
Production processing does not necessarily include testing of all
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.
14 15 16 17
SN54HC646 . . . JT OR W PACKAGE
SN74HC646 . . . DW OR NT PACKAGE
(TOP VIEW)
SN54HC646 . . . FK PACKAGE
(TOP VIEW)
CLKAB
SAB
DIR
A1
A2
A3
A4
A5
A6
A7
A8
GND
VCC
CLKBA
SBA
OE
B1
B2
B3
B4
B5
B6
B7
B8
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
5
6
7
8
9
10
11
25
24
23
22
21
20
19
43
2 1 28
12 13
OE
B1
B2
NC
B3
B4
B5
A1
A2
A3
NC
A4
A5
A6
DIR
SAB
CLKAB
B8
B7
A8
GND
NC
CLKBA
SBA
V
A7
B6
18
27 26
CC
NC – No internal connection
相关PDF资料 |
PDF描述 |
|---|---|
| SN54HC646FK | HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CQCC28 |
| SN54HC652FK | HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CQCC28 |
| SN54HC652WR | HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CDFP24 |
| SN54HC652FKR | HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CQCC28 |
| SN54HC652W | HC/UH SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, CDFP24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SN54HC688J | 制造商:Texas Instruments 功能描述:Identity Comparator 8-Bit 20-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:IDENTITY COMPARATOR 8BIT 20CDIP - Rail/Tube |
| SN54HC74J | 制造商:Texas Instruments 功能描述:Flip Flop D-Type Pos-Edge 2-Element 14-Pin CDIP Tube 制造商:Texas Instruments 功能描述:FLIP FLOP D-TYPE POS-EDGE 2-ELEM 14CDIP - Rail/Tube 制造商:Texas Instruments 功能描述:DUAL D-TYPE FLIP-FLOP*NIC* |
| SN54HC85AJ | 制造商:Texas Instruments 功能描述: |
| SN54HC86J | 制造商:Texas Instruments 功能描述: 制造商:Texas Instruments 功能描述:QUAD 2-INPUT EXCLUSIVE-OR GATE - Rail/Tube 制造商:Texas Instruments 功能描述:XOR Gate 4-Element 2-IN CMOS 14-Pin CDIP Tube |
| SN54HCT04J | 制造商:Texas Instruments 功能描述:Inverter 6-Element CMOS 14-Pin CDIP Tube 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述:INVERTER 6-ELEM CMOS 14CDIP - Rail/Tube 制造商:Texas Instruments 功能描述:HEX INVERTERS |
发布紧急采购，3分钟左右您将得到回复。