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參數(shù)資料
| 型號： | IDT54FCT645SOB |
| 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(fā)器 |
| 文件頁數(shù)： | 1/7頁 |
| 文件大?。?/td> | 84K |
| 代理商： | IDT54FCT645SOB |
Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
MAY 1992
1992 Integrated Device Technology, Inc.
7.9
DSC-4201/3
1
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a registered trademark of National Semiconductor Co.
DIP/SOIC/CERPACK
TOP VIEW
FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVERS
IDT54/74FCT245/A/C
IDT54/74FCT640/A/C
IDT54/74FCT645/A/C
FEATURES:
IDT54/74FCT245/640/645 equivalent to FAST
speed
and drive
IDT54/74FCT245A/640A/645A 25% faster than FAST
IDT54/74FCT245C/640C/645C 40% faster than FAST
TTL input and output level compatible
CMOS output level compatible
I
OL
= 64mA (commercial) and 48mA (military)
Input current levels only 5
μ
A max.
CMOS power levels (2.5mW typical static)
Direction control and over-riding 3-state control
Product available in Radiation Tolerant and Radiation
Enhanced versions
Military product compliant to MIL-STD-883, Class B and
DESC listed
Meets or exceeds JEDEC Standard 18 specifications
DESCRIPTION:
The IDT octal bidirectional transceivers are built using an
advanced dual metal CMOS technology. The IDT54/
74FCT245/A/C, IDT54/74FCT640/A/C and IDT54/74FCT645/
A/C are designed for asynchronous two-way communication
between data buses. The transmit/receive (T/
R
) input deter-
mines the direction of data flow through the bidirectional
transceiver. Transmit (active HIGH) enables data from A
ports to B ports, and receive (active LOW) from B ports to A
ports. The output enable (
OE
) input, when HIGH, disables
both A and B ports by placing them in High-Z condition.
The IDT54/74FCT245/A/C and IDT54/74FCT645/A/C
transceivers have non-inverting outputs. The IDT54/
74FCT640/A/C has inverting outputs.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
2534 drw 02
A
B
0
0
T/R
OE
A
B
1
1
A
B
2
2
A
B
3
3
A
B
4
4
A
B
5
5
A
B
6
6
A
B
7
7
5
6
7
8
9
10
A
1
A
2
A
3
A
4
A
5
A
6
A
7
1
2
3
4
20
19
18
17
16
15
14
13
12
11
Vcc
OE
B
0
T/R
A
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
GND
P20-1
D20-1
SO20-2
&
E20-1
2534 drw 01
INDEX
B
0
B
1
B
2
B
3
B
4
A
2
A
3
A
4
A
5
A
6
B
7
B
6
B
5
G
A
7
A
0
A
1
V
T
O
15
14
18
17
16
5
6
7
8
9
10 11 12
1
4
3
2
20
13
19
L20-2
LCC
TOP VIEW
NOTES:
1. FCT245, 645 are noninverting options.
2. FCT640 is the inverting option.
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