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參數資料
型號: 74FCT245
廠商: Integrated Device Technology, Inc.
英文描述: FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
中文描述: 快速CMOS八路雙向收發器
文件頁數: 1/7頁
文件大小: 91K
代理商: 74FCT245
8-Bit Transceiver
CY54/74FCT245T
SCCS018 - May 1994 - Revised February 2000
Data sheet acquired from Cypress Semiconductor Corporation.
Data sheet modified to remove devices not offered.
Copyright
2000, Texas Instruments Incorporated
Features
Function, pinout, and drive compatible with FCT, and
F logic
FCT-D speed at 3.8 ns max. (Com’l),
FCT-C speed at 4.1 ns max. (Com’l),
FCT-A speed at 4.6 ns max. (Com’l)
Reduced V
(typically = 3.3V) versions of equivalent
FCT functions
Edge-rate control circuitry for significantly improved
noise characteristics
Power-off disable feature
ESD > 2000V
Matched rise and fall times
Fully compatible with TTL input and output logic levels
Extended commercial range of
40C to +85C
Sink current
64 mA (Com’l), 48 mA (Mil)
Source current
32 mA (Com’l), 12 mA (Mil)
Functional Description
The FCT245T contains eight non-inverting bidirectional buff-
ers with three-state outputs and is intended for bus oriented
applications. For the FCT245T, current sinking capability is 64
mA at the A and B ports.
The Transmit/Receiver (T/R) input determines the direction of
data flow through bidirectional transceiver. Transmit (Active
HIGH) enables data from A ports to B ports. The output enable
(OE), when HIGH, disables both the A and B ports by putting
them in a High Z condition.
The outputs are designed with a power-off disable feature to
allow for live insertion of boards.
Function Table
[1]
OE
L
L
H
T/R
L
H
X
Operation
B Data to Bus A
A Data to Bus B
High Z State
Note:
1.
H = HIGH Voltage Level. L = LOW Voltage Level. X = Don’t Care.
LogicBlockDiagram
Pin Configurations
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
OE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
T/R
4
8
9
10
11
12
13
7
6 5
1516 17 18
3
2
1
20
19
14
A
A
A
B1
B4
B0
B
7
B
6
V
CC
OE
GND
B3
Top View
A
LCC
T/R
A
0
A
1
A
7
B
5
1
2
3
4
5
6
7
8
9
10
11
12
16
17
18
19
20
13
14
V
CC
OE
15
Top View
B2
A
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
T/R
GND
DIP/SOIC/QSOP
相關PDF資料
PDF描述
74FR245 Octal Bidirectional Transceiver with TRI-STATE Outputs
74FR245P Octal Bidirectional Transceiver with TRI-STATE Outputs
74FR245S Octal Bidirectional Transceiver with TRI-STATE Outputs
74FR245 Octal Bidirectional Transceiver with 3-STATE Outputs
74FR245PC Octal Bidirectional Transceiver with 3-STATE Outputs
相關代理商/技術參數
參數描述
74FCT245 WAF 制造商:Texas Instruments 功能描述:
74FCT245A WAF 制造商:Texas Instruments 功能描述:
74FCT245ADCQR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single 8-bit Bus Transceiver
74FCT245ADCX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single 8-bit Bus Transceiver
74FCT245AFC 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Single 8-bit Bus Transceiver
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