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Integrated Device Technology Electronic Components Datasheet

IDT74FCT245T Datasheet

FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

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IDT74FCT245T pdf
Integrated Device Technology, Inc.
FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVERS
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT
IDT54/74FCT640T/AT/CT
IDT54/74FCT645T/AT/CT/DT
FEATURES:
• Common features:
– Low input and output leakage 1µA (max.)
– CMOS power levels
– True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
– 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, SSOP, QSOP, CERPACK
and LCC packages
• Features for FCT245T/FCT640T/FCT645T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 64mA IOL)
• Features for FCT2245T:
– Std., A and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– Reduced system switching noise
DESCRIPTION:
The IDT octal bidirectional transceivers are built using an
advanced dual metal CMOS technology. The FCT245T/
FCT2245T, FCT640T and FCT645T are designed for asyn-
chronous two-way communication between data buses. The
transmit/receive (T/R) input determines 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 FCT245T/FCT2245T and FCT645T transceivers have
non-inverting outputs. The FCT640T has inverting outputs.
The FCT2245T has balanced drive outputs with current
limiting resistors. This offers low ground bounce, minimal
undershoot and controlled output fall times- reducing the need
for external series terminating resistors. The FCT2xxxT parts
are plug-in replacements for FCTxxxT parts.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
T/R
OE
A0
B0
A1
B1
A2
B2
A3
B3
A4
B4
A5
B5
A6
B6
A7
B7
FCT245T/2245T, FCT645T are non-inverting options.
FCT640T is the inverting options.
2539 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1995 Integrated Device Technology, Inc.
6.9
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
1 20
2 19
3 P20-1 18
4 D20-1 17
5 SO20-2 16
SO20-7*
6 SO20-8** 15
7 & 14
8 E20-1 13
9 12
10 11
Vcc
OE
B0
B1
B2
B3
B4
B5
B6
B7
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
*FCT245T/2245T, FCT645T only.
**FCT245T/2245T, FCT640T
INDEX
3 2 20 19
A2 4
1 18 B0
A3 5
17 B1
A4 6 L20-2 16 B2
A5 7
15 B3
A6 8
14 B4
9 10 11 12 13
2539 drw 02
LCC
TOP VIEW
2539 drw 03
AUGUST 1995
DSC-4611/4
1


Integrated Device Technology Electronic Components Datasheet

IDT74FCT245T Datasheet

FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS

No Preview Available !

IDT74FCT245T pdf
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT, IDT54/74FCT640T/AT/CT, IDT54/74FCT645T/AT/CT/DT
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
FUNCTION TABLE(2)
Pin Names
OE
T/R
A0-A7
B0-B7
Description
Output Enable Input (Active LOW)
Transmit/Receive Input
Side A Inputs or 3-State Outputs
Side B Inputs or 3-State Outputs
2539 tbl 01
Inputs
OE T/R
Outputs
L L Bus B Data to Bus A(1)
L H Bus B Data to Bus B(1)
H X High Z State
NOTES:
1. 640 is inverting from input to output.
2. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
2539 tbl 02
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
VTERM(2) Terminal Voltage
with Respect to
GND
VTERM(3) Terminal Voltage
with Respect to
GND
TA Operating
Temperature
TBIAS Temperature
Under Bias
TSTG Storage
Temperature
PT Power Dissipation
Commercial
–0.5 to +7.0
–0.5 to
VCC +0.5
0 to +70
–55 to +125
–55 to +125
0.5
Military
–0.5 to +7.0
–0.5 to
VCC +0.5
–55 to +125
–65 to +135
–65 to +150
0.5
Unit
V
V
°C
°C
°C
W
IOUT
DC Output
–60 to +120 –60 to +120 mA
Current
NOTES:
2539 lnk 03
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
only and functional operation of the device at these or any other conditions
above those indicated in the operational sections of this specification is
not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability. No terminal voltage may exceed
VCC by +0.5V unless otherwise noted.
2. Input and VCC terminals only.
3. Outputs and I/O terminals only.
CAPACITANCE (TA = +25°C, F = 1.0MHZ)
Symbol Parameter(1) Conditions Typ. Max. Unit
CIN Input
VIN = 0V 6 10 pF
Capacitance
COUT Output
VOUT = 0V 8
12 pF
Capacitance
NOTE:
2539 lnk 04
1. This parameter is measured at characterization but not tested.
6.9 2


Part Number IDT74FCT245T
Description FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
Maker Integrated Device Tech
Total Page 8 Pages
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