IDT IDT74FCT645SO Fast cmos octal bidirectional transceiver Datasheet


IDT54/74FCT245/A/C
IDT54/74FCT640/A/C
IDT54/74FCT645/A/C
FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVERS
Integrated Device Technology, Inc.
FEATURES:
DESCRIPTION:
• 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
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
transceivers have non-inverting outputs. The IDT54/
74FCT640/A/C has inverting outputs.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
T/R
T/R
A0
A1
A2
A3
A4
A5
A6
A7
GND
OE
A0
B0
A1
B1
A2
B2
1
20
2
19
3
18
P20-1
D20-1
SO20-2
&
E20-1
4
5
6
7
17
16
15
14
8
13
9
12
10
11
Vcc
OE
B0
B1
B2
B3
B4
B5
B6
B7
DIP/SOIC/CERPACK
TOP VIEW
A3
A1
A0
T/R
Vcc
OE
B3
A4
INDEX
B4
3 2
A5
A2
A3
A4
A5
A6
B5
A6
B6
4
5
6
1
20 19
18
L20-2
17
16
7
15
8
14
9 10 11 12 13
B0
B1
B2
B3
B4
A7
GND
B7
B6
B5
A7
B7
2534 drw 01
NOTES:
1. FCT245, 645 are noninverting options.
2. FCT640 is the inverting option.
LCC
TOP VIEW
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
MAY 1992
DSC-4201/3
1
IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
FUNCTION TABLE(2)
PIN DESCRIPTION
Pin Names
Description
Inputs
OE
T/R
Output Enable Input (Active LOW)
OE
T/R
Transmit/Receive Input
L
L
Bus B Data to Bus A(1)
A0–A7
Side A Inputs or 3-State Outputs
L
H
Bus A Data to Bus B(1)
B0–B7
Side B Inputs or 3-State Outputs
H
X
High Z State
2534 tbl 05
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
Outputs
2534 tbl 06
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Military
Unit
–0.5 to +7.0 V
–0.5 to VCC
–0.5 to VCC
V
0 to +70
–55 to +125
°C
–55 to +125
–65 to +135
°C
–55 to +125
–65 to +150
°C
0.5
120
0.5
120
W
mA
Symbol
Parameter(1)
Conditions
Typ. Max. Unit
CIN
Input Capacitance
VIN = 0V
6
10
pF
CI/O
I/O Capacitance
VOUT = 0V
8
12
pF
NOTE:
2534
1. This parameter is measured at characterization but not tested.
tbl 02
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
Test Conditions(1)
Parameter
VIH
Input HIGH Level
VIL
Input LOW Level
Guaranteed Logic LOW Level
IIH
Input HIGH Current
(Except I/O pins)
Input LOW Current
(Except I/O pins)
VCC = Max
Input HIGH Current
VCC = Max
IIL
IIH
IIL
Guaranteed Logic HIGH Level
VI = VCC
VI = 2.7V
VI = 0.5V
VI = GND
Typ.(2)
Max.
Unit
2.0
—
—
V
—
—
0.8
V
—
—
—
—
—
—
—
—
5
5(4)
–5(4)
–5
µA
µA
VI = VCC
—
—
15
(I/O pins only)
VI = 2.7V
—
—
15(4)
Input LOW Current
VI = 0.5V
—
—
–15(4)
(I/O pins only)
VIK
Min.
Clamp Diode Voltage
VI = GND
VCC = Min., IN = –18mA
(3)
—
—
–15
—
–0.7
–1.2
V
IOS
Short Circuit Current
VCC = Max. , VO = GND
–60
–120
—
mA
VOH
Output HIGH Voltage
VCC = 3V, VIN = VLC or VHC, IOH = –32µA
VHC
VCC
—
V
VCC = Min.
IOH = –300µA
VHC
VCC
—
VIN = VIH or VIL
IOH = –12mA MIL.
2.4
4.3
—
IOH = –15mA COM’L.
2.4
4.3
—
—
GND
VLC
GND
VLC(4)
VOL
Output LOW Voltage
(Port A and Port B)
VCC = 3V, VIN = VLC or VHC, IOL = 300µA
VCC = Min.
IOL = 300µA
—
VIN = VIH or VIL
IOL = 48mA MIL.
—
0.3
0.55
IOL = 64mA COM’L.
—
0.3
0.55
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.
7.9
V
2534 tbl 03
3
IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
VLC = 0.2V; VHC = VCC – 0.2V
Symbol
Parameter
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
—
0.5
1.5
mA
—
0.5
2.0
mA
ICC
Quiescent Power Supply Current
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
ICCD
Dynamic Power Supply Current(4)
Vcc = Max.
Outputs Open
OE = GND
T/R = GND or VCC
One Input Toggling
50% Duty Cycle
VIN ≥ VHC
VIN ≤ VLC
—
0.15
0.25
mA/MHz
IC
Total Power Supply Current(6)
Vcc = Max.
Outputs Open
fi = 10MHz
VIN ≥ VHC
VIN ≤ VLC
(FCT)
—
2.0
4.0
mA
50% Duty Cycle
T/R = OE = GND
One Bit Toggling
VIN = 3.4V
VIN = GND
—
2.3
5.0
Vcc = Max.
Outputs Open
fi = 2.5MHz
VIN ≥ VHC
VIN ≤ VLC
(FCT)
—
3.5
6.5(5)
50% Duty Cycle
T/R = OE = GND
Eight Bits Toggling
VIN = 3.4V
VIN = GND
—
5.5
14.5(5)
Vcc = Max.
VIN ≥ VHC; VIN ≤ VLC
Vcc = Max.
VIN = 3.4V(3)
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.
3. Per TTL driven input (VIN = 3.4V); all other inputs at VCC or GND.
4. This parameter is not directly testable, but is derived for use in Total Power Supply calculations.
5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
6. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + fiNi)
ICC = Quiescent Current
∆ICC = Power Supply Current for a TTL High Input (VIN = 3.4V)
DH = Duty Cycle for TTL Inputs High
NT = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Output Transition Pair (HLH or LHL)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fi = Input Frequency
Ni = Number of Inputs at fi
All currents are in milliamps and all frequencies are in megahertz.
7.9
2534 tbl 04
4
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
Com’l.
Symbol
Parameter
tPLH
tPHL
Propagation Delay
A to B, B to A
tPZH
tPZL
54/74FCT245A
Mil.
Com’l.
54/74FCT245C
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
RL = 500Ω
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
Output Enable Time
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
tPLZ
Output Disable Time
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
tPZL
Output EnableTime
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
tPLZ
Output Disable Time
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
Com’l.
Symbol
Parameter
tPLH
tPHL
Propagation Delay
A to B, B to A
tPZH
tPZL
(1)
Condition
CL = 50 pF
RL = 500Ω
(2)
Min.
54/74FCT640A
Mil.
(2)
Max. Min.
Com’l.
(2)
Max. Min.
54/74FCT640C
Mil.
(2)
Max. Min.
Max.
Com’l.
(2)
Min.
Mil.
Max. Min.
(2)
Max. Unit
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
Output Enable Time
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
tPLZ
Output Disable Time
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
tPZL
Output Enable Time
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
tPLZ
Output Disable Time
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
Com’l.
Symbol
Parameter
tPLH
tPHL
Propagation Delay
A to B, B to A
tPZH
tPZL
54/74FCT645A
Mil.
Com’l.
54/74FCT645C
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
RL = 500Ω
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
Output Enable Time
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
tPLZ
Output Disable Time
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
tPZL
Output Enable Time
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
tPLZ
Output Disable Time
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
IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
VCC
7.0V
500Ω
V OUT
VIN
Pulse
Generator
D.U.T.
50pF
RT
500Ω
SET-UP, HOLD AND RELEASE TIMES
Closed
All Other Tests
Open
3V
1.5V
0V
tH
TIMING
INPUT
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
tW
t REM
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
Open Drain
Disable Low
Enable Low
PULSE WIDTH
DATA
INPUT
ASYNCHRONOUS CONTROL
Switch
DEFINITIONS:
2534 tbl 08
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
CL
t SU
Test
t SU
1.5V
3V
1.5V
0V
tH
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
3V
1.5V
SAME PHASE
INPUT TRANSITION
t PLH
t PHL
CONTROL
INPUT
t PZL
0V
OUTPUT
NORMALLY SWITCH
LOW CLOSED
t PZH
VOH
1.5V
OUTPUT
VOL
t PLH
t PHL
OUTPUT SWITCH
NORMALLY OPEN
HIGH
3V
OPPOSITE PHASE
INPUT TRANSITION
1.5V
1.5V
0V
t PLZ
3.5V
3.5V
1.5V
0.3V
V OL
t PHZ
0.3V
1.5V
0V
V OH
0V
0V
NOTES
2534 drw 04
1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0 MHz; ZO ≤ 50Ω; tF ≤ 2.5ns;
tR ≤ 2.5ns.
7.9
6
IDT54/74FCT245/A/C, IDT54/74FCT640/A/C, IDT54/74FCT645/A/C
FAST CMOS OCTAL BIDIRECTIONAL TRANSCEIVERS
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT
XX
Temperature
Range
FCT
X
X
X
Device
Type
Package
Process
Blank
B
Commercial
MIL-STD-883, Class B
P
D
SO
L
E
Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
245
640
645
245A
640A
645A
245C
640C
645C
Non-Inverting Buffer Transceiver
Octal Inverting Buffer Transceiver
Non-Inverting Buffer Transceiver
Fast Non-Inverting Buffer Transceiver
Fast Octal Inverting Buffer Transceiver
Fast Non-Inverting Buffer Transceiver
Super Fast Non-Inverting Buffer Transceiver
Super Fast Octal Inverting Buffer Transceiver
Super Fast Non-Inverting Buffer Transceiver
54
74
–55°C to +125°C
0°C to +70°C
2534 drw 03
7.9
7
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