IDT74FCT621T Datasheet, PDF (1/6 Pages) Integrated Device Technology – FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)

IDT54/74FCT621T/AT
FAST CMOS OCTAL BUS TRANSCEIVER (OPEN DRAIN)
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FAST CMOS
IDT54/74FCT621T/AT
OCTAL BUS TRANSCEIVER
Integrated Device Technology, Inc.
(OPEN DRAIN)
FEATURES:
• Std. and A speed grades
• Low input and output leakage ≤1µA (max.)
• CMOS power levels
• True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
• Power off disable outputs permit “live insertion”
• Meets or exceeds JEDEC standard 18 specifications
• Product available in Radiation Tolerant and Radiation
Enhanced versions
• Military product compliant to MIL-STD-883, Class B
and DESC listed (dual marked)
• Available in DIP, SOIC, CERPACK and LCC packages
DESCRIPTION:
The IDT54/74FCT621T/AT is an octal transceiver with
non-inverting Open-Drain bus compatible outputs in both
send and receive directions. The B bus outputs are capable
of sinking 64mA providing very good capacitive drive
characteristics. These octal bus transceivers are designed for
asynchronous two-way communication between data buses.
The control function implementation allows for maximum
flexibility in timing.
FUNCTIONAL BLOCK DIAGRAM ⁽¹⁾
GBA
GAB
A1
B1
A2 –A8
B 2 –B 8
7 Other Transceivers
2538 drw 01
PIN CONFIGURATIONS
GAB
A1
A2
A3
A4
A5
A6
A7
A8
GND
1
20
2
19
3
18
4
P20-1,
D20-1,
17
5 _SO20-2 16
6
&
15
7 ^E20-1 14
8
13
9
12
10
11
Vcc
GBA
B1
B2
B3
B4
B5
B6
B7
B8
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DIP/SOIC/CERPACK
TOP VIEW
INDEX
32
20 19
A3 4
1
18 B1
A4 5
17 B2
A5 6 ^L20-2 16 B3
A6 7
15 B4
A7 8
14 B5
9 10 11 12 13
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The IDT logo is a registered trademark of Integreted Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1995 Integrated Device Technology, Inc.
66..1188
LCC
TOP VIEW
APRIL 1994
DSC-42₁22/4
1