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Número de pieza | IDT54FCT245EB | |
Descripción | FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS | |
Fabricantes | Integrated Device Technology | |
Logotipo | ||
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Integrated Device Technology, Inc.
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
• IOL = 64mA (commercial) and 48mA (military)
• Input current levels only 5µA 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
T/R
A0
A1
A2
A3
A4
A5
A6
A7
NOTES:
1. FCT245, 645 are noninverting options.
2. FCT640 is the inverting option.
OE
B0
B1
B2
B3
B4
B5
B6
B7
2534 drw 02
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a registered trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1992 Integrated Device Technology, Inc.
7.9
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
1 20
2 19
3 18
4 P20-1 17
5
D20-1
SO20-2 16
6 & 15
7 E20-1 14
8 13
9 12
10 11
Vcc
OE
B0
B1
B2
B3
B4
B5
B6
B7
DIP/SOIC/CERPACK
TOP VIEW
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
LCC
TOP VIEW
2534 drw 01
MAY 1992
DSC-4201/3
1
1 page IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT245/A/C
54/74FCT245
54/74FCT245A
54/74FCT245C
Symbol
tPLH
tPHL
Parameter
Propagation Delay
A to B, B to A
Com’l.
Mil.
Com’l. Mil. Com’l. Mil.
Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
CL = 50 pF 1.5 7.0 1.5 7.5 1.5 4.6 1.5 4.9 1.5 4.1 1.5 4.5 ns
RL = 500Ω
tPZH Output Enable Time
tPZL OE to A or B
1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns
tPHZ Output Disable Time
tPLZ OE to A or B
1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns
tPZH Output EnableTime
tPZL T/R to A or B(3)
1.5 9.5 1.5 10.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns
tPHZ Output Disable Time
tPLZ T/R to A or B(3)
1.5 7.5 1.5 10.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns
2534 tbl 07
SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT640/A/C
54/74FCT640
54/74FCT640A
54/74FCT640C
Symbol
Parameter
Com’l.
Mil.
Com’l. Mil. Com’l. Mil.
Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
tPLH Propagation Delay CL = 50 pF 2.0 7.0 2.0 8.0 1.5 5.0 1.5 5.3 1.5 4.4 1.5 4.7 ns
tPHL A to B, B to A
RL = 500Ω
tPZH Output Enable Time
tPZL OE to A or B
2.0 13.0 2.0 16.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns
tPHZ Output Disable Time
tPLZ OE to A or B
2.0 10.0 2.0 12.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns
tPZH Output Enable Time
tPZL T/R to A or B(3)
2.0 13.0 2.0 16.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns
tPHZ Output Disable Time
tPLZ T/R to A or B(3)
2.0 10.0 2.0 12.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns
2534 tbl 08
SWITCHING CHARACTERISTICS OVER OPERATING RANGE FOR FCT645/A/C
54/74FCT645
54/74FCT645A
54/74FCT645C
Symbol
Parameter
Com’l.
Mil.
Com’l. Mil. Com’l. Mil.
Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
tPLH Propagation Delay CL = 50 pF 1.5 9.5 1.5 11.0 1.5 4.6 1.5 4.9 1.5 4.1 1.5 4.5 ns
tPHL A to B, B to A
RL = 500Ω
tPZH Output Enable Time
tPZL OE to A or B
1.5 11.0 1.5 12.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns
tPHZ Output Disable Time
tPLZ OE to A or B
1.5 12.0 1.5 13.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns
tPZH Output Enable Time
tPZL T/R to A or B(3)
1.5 11.0 1.5 12.0 1.5 6.2 1.5 6.5 1.5 5.8 1.5 6.2 ns
tPHZ Output Disable Time
tPLZ T/R to A or B(3)
1.5 12.0 1.5 13.0 1.5 5.0 1.5 6.0 1.5 4.8 1.5 5.2 ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
3. This parameter is guaranteed but not tested.
2534 tbl 09
7.9 5
5 Page |
Páginas | Total 7 Páginas | |
PDF Descargar | [ Datasheet IDT54FCT245EB.PDF ] |
Número de pieza | Descripción | Fabricantes |
IDT54FCT245E | FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS | Integrated Device Technology |
IDT54FCT245EB | FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS | Integrated Device Technology |
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