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Part: IDT54FCT245TSOB
Category:
Interface and Interconnect
-> Transceivers
Description: Fast CMOS Octal Bidirectional Transceivers
Company: Integrated Device Technology, Inc.
Datasheet: Download IDT54FCT245TSOB datasheet File size : 239 kB
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Datasheet text preview:
®
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
DESCRIPTION:
IDT54/74FCT245/A/C IDT54/74FCT640/A/C IDT54/74FCT645/A/C
Integrated Device Technology, Inc.
FEATURES:
· IDT54/74FCT245/640/645 equivalent to FASTTM 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
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 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 IDT54/74FCT245/A/C and IDT54/74FCT645/A/C t r a n s c e i v e r s have non-inverting outputs. The IDT54/ 74FCT640/A/C has inverting outputs.
FUNCTIONAL BLOCK DIAGRAM
T/R OE A0 B0 A1 B1 A2 B2 A3 B3
PIN CONFIGURATIONS
T/R A0 A1 A2 A3 A4 A5 A6 A7 GND
1 2 3 4 5 6 7 8 9 10 20 19 18
P20-1 D20-1 SO20-2 & E20-1
17 16 15 14 13 12 11
Vcc OE B0 B1 B2 B3 B4 B5 B6 B7
DIP/SOIC/CERPACK TOP VIEW
INDEX
B4 A5 B5 A6 B6 A7 B7
NOTES: 1. FCT245, 645 are noninverting options. 2. FCT640 is the inverting option.
2534 drw 02
A2 A3 A4 A5 A6
A1 A0 T/R Vcc OE
32 4 5 6 7 8 1 20 19 18 17 16 15 14 9 10 11 12 13
A4
L20-2
B0 B1 B2 B3 B4
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.
A7 GND B7 B6 B5
LCC TOP VIEW
2534 drw 01
MAY 1992
DSC-4201/3
7.9
1
IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names Description Output Enable Input (Active LOW) Transmit/Receive Input Side A Inputs or 3-State Outputs Side B Inputs or 3-State Outputs
2534 tbl 05
FUNCTION TABLE(2)
Inputs
OE T/ R
A0A7 B0B7
OE
L L H
T/ R L H X
Outputs Bus B Data to Bus A(1) Bus A Data to Bus B(1) High Z State
2534 tbl 06
NOTES: 1. 640 is inverting from input to output. 2. H = HIGH Voltage Level L = LOW Voltage Level X = Don't Care
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 DC Output Current IOUT Commercial 0.5 to +7.0 Military Unit 0.5 to +7.0 V
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol C IN C I/O Parameter(1) Input Capacitance I/O Capacitance Conditions VIN = 0V VOUT = 0V Typ. Max. Unit 6 8 10 12 pF pF
tbl 02
0.5 to VCC
0.5 to VCC
V
NOTE: 2534 1. This parameter is measured at characterization but not tested.
0 to +70 55 to +125 55 to +125 0.5 120
55 to +125 65 to +135 65 to +150 0.5 120
°C °C °C W mA
NOTES: 2534 tbl 01 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS 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. Inputs and VCC terminals. 3. Outputs and I/O terminals.
7.9
2
IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified: VLC = 0.2V; VHC = VCC 0.2V Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = 55°C to +125°C, VCC = 5.0V ± 10%
Symbol V IH V IL IIH IIL IIH IIL VIK IOS V OH Parameter Input HIGH Level Input LOW Level Input HIGH Current (Except I/O pins) Input LOW Current (Except I/O pins) Input HIGH Current (I/O pins only) Input LOW Current (I/O pins only) Clamp Diode Voltage Short Circuit Current Output HIGH Voltage VCC = Min., IN = 18mA VCC = Max. , VO = GND VCC = 3V, VIN = VLC or VHC, IOH = 32µA VCC = Min. VIN = VIH or VIL V OL Output LOW Voltage (Port A and Port B) IOH = 300µA IOH = 12mA MIL. IOH = 15mA COM'L. VCC = 3V, VIN = VLC or VHC, IOL = 300µA VCC = Min. VIN = VIH or VIL IOL = 300µA IOL = 48mA MIL. IOL = 64mA COM'L.
(3)
Test Conditions(1) Guaranteed Logic HIGH Level Guaranteed Logic LOW Level VCC = Max VI = VCC VI = 2.7V VI = 0.5V VI = GND VI = VCC VI = 2.7V VI = 0.5V VI = GND
Min. 2.0 -- -- -- -- -- -- -- -- -- -- 60 VHC VHC 2.4 2.4 -- -- -- --
Typ. (2) -- -- -- -- -- -- -- -- -- -- 0.7 120 VCC VCC 4.3 4.3 GND GND 0.3 0.3
Max. -- 0.8 5 5(4) 5(4) 5 15 15(4) 15(4) 15 1.2 -- -- -- -- -- V LC VLC(4) 0.55 0.55
Unit V V µA
VCC = Max
µA
V mA V
V
NOTES: 1. For conditions shown as Max. or Min., use appropriate value specified under Electrical Characteristics for the applicable device type. 2. Typical values are at VCC = 5.0V, +25°C ambient and maximum loading. 3. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second. 4. This parameter is guaranteed but not tested.
2534 tbl 03
7.9
3
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