IDT IDT54FCT645CTL Fast cmos octal bidirectional transceiver Datasheet

FAST CMOS OCTAL
BIDIRECTIONAL
TRANSCEIVERS
IDT54/74FCT245T/AT/CT/DT - 2245T/AT/CT
IDT54/74FCT640T/AT/CT
IDT54/74FCT645T/AT/CT/DT
Integrated Device Technology, Inc.
FEATURES:
DESCRIPTION:
• 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
The IDT octal bidirectional transceivers are built using an
advanced dual metal CMOS technology. The FCT245T/
FCT2245T, FCT640T and FCT645T 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 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
A0
A1
A2
A3
A4
A5
A6
A7
GND
T/R
OE
A0
B0
A1
B1
A2
B2
1
20
2
19
3
P20-1
D20-1
SO20-2
SO20-7*
SO20-8**
&
E20-1
4
5
6
7
8
18
17
16
15
14
13
9
12
10
11
Vcc
OE
B0
B1
B2
B3
B4
B5
B6
B7
B3
A4
2539 drw 02
A1
A0
T/R
Vcc
OE
DIP/SOIC/SSOP/QSOP/CERPACK
TOP VIEW
*FCT245T/2245T, FCT645T only.
**FCT245T/2245T, FCT640T
A3
INDEX
B4
3
A5
A2
A3
A4
A5
A6
B5
A6
B6
A7
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.
2
1
20 19
18
5
6
17
L20-2
16
7
15
8
14
9 10 11 12 13
A7
GND
B7
B6
B5
B7
4
6.9
B0
B1
B2
B3
B4
2539 drw 03
LCC
TOP VIEW
AUGUST 1995
DSC-4611/4
1
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
FUNCTION TABLE(2)
PIN DESCRIPTION
Pin Names
OE
T/R
Description
Output Enable Input (Active LOW)
Inputs
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 B Data to Bus B(1)
B0-B7
Side B Inputs or 3-State Outputs
H
X
High Z State
2539 tbl 01
ABSOLUTE MAXIMUM RATINGS(1)
Military
–0.5 to +7.0
Unit
V
–0.5 to
VCC +0.5
V
–55 to +125
°C
–65 to +135
°C
–65 to +150
°C
0.5
W
I OUT
–60 to +120
mA
–60 to +120
2539 tbl 02
NOTES:
1. 640 is inverting from input to output.
2. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don't Care
CAPACITANCE (TA = +25°C, F = 1.0MHZ)
Symbol
Rating
Commercial
VTERM(2) Terminal Voltage
–0.5 to +7.0
with Respect to
GND
VTERM(3) Terminal Voltage
–0.5 to
with Respect to
VCC +0.5
GND
TA
Operating
0 to +70
Temperature
TBIAS
Temperature
–55 to +125
Under Bias
TSTG
Storage
–55 to +125
Temperature
PT
Power Dissipation
0.5
DC Output
Current
Outputs
Symbol
Parameter(1)
CIN
Input
Capacitance
COUT
Output
Capacitance
Conditions
VIN = 0V
Typ.
6
VOUT = 0V
8
Max. Unit
10
pF
12
NOTE:
1. This parameter is measured at characterization but not tested.
pF
2539 lnk 04
2539 lnk 03
NOTES:
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. Input and VCC terminals only.
3. Outputs and I/O terminals only.
6.9
2
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
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
VIH
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Min.
2.0
Typ.(2)
—
Max.
—
Unit
V
VIL
Input LOW Level
Guaranteed Logic LOW Level
—
—
0.8
V
II H
Input HIGH Current(4)
VCC = Max.
VI = 2.7V
—
—
±1
µA
II L
Input LOW Current (4)
VI = 0.5V
—
—
±1
I OZH
High Impedance Output Current
I OZL
(3-State Output pins) (4)
II
Input HIGH Current(4)
VCC = Max., VI = VCC (Max.)
VIK
Clamp Diode Voltage
VH
Input Hysteresis
I CC
Quiescent Power Supply Current
VO = 2.7V
—
—
±1
VO = 0.5V
—
—
±1
—
—
±1
VCC = Min., IIN = –18mA
—
–0.7
–1.2
V
—
—
200
—
mV
—
0.01
1
VCC = Max.
VCC = Max., VIN = GND or VCC
µA
µA
mA
2539 lnk 05
OUTPUT DRIVE CHARACTERISTICS FOR FCT245T/640T/645T
Symbol
VOH
Parameter
Output HIGH Voltage
VOL
Output LOW Voltage
I OS
Short Circuit Current
Test Conditions(1)
VCC = Min.
I OH = –6mA MIL.
VIN = VIH or V IL
I OH = –8mA COM'L.
I OH = –12mA MIL.
I OH = –15mA COM'L.
VCC = Min.
I OL = 48mA MIL.
VIN = VIH or V IL
I OL = 64mA COM'L.
VCC = Max., VO = GND (3)
Min.
2.4
Typ.(2)
3.3
Max.
—
Unit
V
2.0
3.0
—
V
—
0.3
0.55
V
–60
–120
–225
mA
2539 lnk 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT2245T
Symbol
I ODL
Parameter
Output LOW Current
Test Conditions(1)
VCC = 5V, VIN = VIH or VIL, VOUT = 1.5V (3)
Min.
16
Typ.(2)
48
Max.
—
Unit
mA
I ODH
Output HIGH Current
VCC = 5V, VIN = VIH or V IL, VOUT = 1.5V (3)
–16
–48
—
mA
VOH
Output HIGH Voltage
2.4
3.3
—
V
VOL
Output LOW Voltage
VCC = Min.
VIN = VIH or VIL
VCC = Min.
VIN = VIH or V IL
—
0.3
0.50
V
I OH = –12mA MIL.
I OH = –15mA COM'L.
I OL = 12mA
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. Not more than one output should be shorted at one time. Duration of the short circuit test should not exceed one second.
4. The test limit for this parameter is ±5µA at TA = –55°C.
6.9
2539 lnk 07
3
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
POWER SUPPLY CHARACTERISTICS
Symbol
∆ICC
ICCD
IC
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply
Current(4)
Total Power Supply Current (6)
Test Conditions(1)
VCC = Max.
VIN = 3.4V(3)
VCC = Max.
Outputs Open
OE = T/R = GND
One Input Toggling
50% Duty Cycle
VCC = Max.
Min.
—
Typ.(2)
0.5
Max.
2.0
Unit
mA
mA/
MHz
VIN = VCC FCTxxxT
VIN = GND
FCT2xxxT
—
0.15
0.25
—
0.06
0.12
VIN = VCC
—
1.5
3.5
FCTxxxT
Outputs Open
fi = 10MHz
50% Duty Cycle
VIN = GND FCT2xxxT
—
0.6
2.2
VIN = 3.4
—
1.8
4.5
OE = T/R = GND
VIN = GND FCT2xxxT
0.9
3.2
One Bit Toggling
VCC = Max.
VIN = VCC
—
3.0
6.0 (5)
FCTxxxT
FCTxxxT
Outputs Open
fi = 2.5MHz
50% Duty Cycle
VIN = GND FCT2xxxT
—
1.2
3.4 (5)
VIN = 3.4
—
5.0
14.0 (5)
OE = T/R = GND
VIN = GND FCT2xxxT
—
3.2
11.4 (5)
FCTxxxT
mA
Eight Bits Toggling
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 Input 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.
6.9
2539 tbl 08
4
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
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT245T
FCT2245T
FCT245AT
FCT2245AT
Com'l.
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B (3)
Output Disable Time
T/R to A or B (3)
Conditions(1)
CL = 50 pF
RL = 500Ω
Mil.
Com'l.
Mil.
Min.(2)
1.5
Max.
7.0
Min.(2)
1.5
Max.
7.5
Min.(2)
1.5
Max.
4.6
Min.(2)
1.5
Max.
4.9
Unit
ns
1.5
9.5
1.5
10.0
1.5
6.2
1.5
6.5
ns
1.5
7.5
1.5
10.0
1.5
5.0
1.5
6.0
ns
1.5
9.5
1.5
10.0
1.5
6.2
1.5
6.5
ns
1.5
7.5
1.5
10.0
1.5
5.0
1.5
6.0
ns
2534 tbl 09
FCT245CT
FCT2245CT
Com'l.
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B (3)
Output Disable Time
T/R to A or B (3)
Conditions(1)
CL = 50 pF
RL = 500Ω
FCT245DT
Mil.
Com'l.
Mil.
Min.(2)
1.5
Max.
4.1
Min.(2)
1.5
Max.
4.5
Min.(2)
1.5
Max.
3.8
Min.(2)
—
Max.
—
Unit
ns
1.5
5.8
1.5
6.2
1.5
5.0
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.3
—
—
ns
1.5
5.8
1.5
6.2
1.5
5.0
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.3
—
—
ns
2534 tbl 10
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT640T
Com'l.
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B (3)
Output Disable Time
T/R to A or B (3)
FCT640AT
Mil.
Com'l.
FCT640CT
Mil.
Com'l.
Mil.
Conditions(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) 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
CL = 50 pF
RL = 500Ω
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
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
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
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
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 11
6.9
5
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
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT645T
Com'l.
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B (3)
Output Disable Time
T/R to A or B (3)
FCT645AT
Mil.
Com'l.
Mil.
Conditions(1)
Min.(2)
1.5
1.5
Max.
4.6
Min.(2)
1.5
Max.
11.0
Min.(2)
CL = 50 pF
RL = 500Ω
Max.
9.5
Min.(2)
1.5
Max.
4.9
Unit
ns
1.5
11.0
1.5
12.0
1.5
6.2
1.5
6.5
ns
1.5
12.0
1.5
13.0
1.5
5.0
1.5
6.0
ns
1.5
11.0
1.5
12.0
1.5
6.2
1.5
6.5
ns
1.5
12.0
1.5
13.0
1.5
5.0
1.5
6.0
ns
2534 tbl 12
FCT645CT
Com'l.
Symbol
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
tPZH
tPZL
tPHZ
tPLZ
Parameter
Propagation Delay
A to B, B to A
Output Enable Time
OE to A or B
Output Disable Time
OE to A or B
Output Enable Time
T/R to A or B (3)
Output Disable Time
T/R to A or B (3)
FCT645DT
Mil.
Com'l.
Mil.
Conditions(1)
Min.(2)
1.5
1.5
Max.
3.8
Min.(2)
1.5
Max.
4.5
Min.(2)
CL = 50 pF
RL = 500Ω
Max.
4.1
Min.(2)
—
Max.
—
Unit
ns
1.5
5.8
1.5
6.2
1.5
5.0
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.3
—
—
ns
1.5
5.8
1.5
6.2
1.5
5.0
—
—
ns
1.5
4.8
1.5
5.2
1.5
4.3
—
—
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 13
6.9
6
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
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
V CC
7.0V
500Ω
Pulse
Generator
Switch
Open Drain
Disable Low
Closed
Enable Low
V OUT
VIN
Test
Open
All Other Tests
D.U.T.
50pF
RT
DEFINITIONS:
2534 lnk 14
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
500Ω
CL
2534 drw 04
SET-UP, HOLD AND RELEASE TIMES
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tH
tSU
tREM
tSU
PULSE WIDTH
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
1.5V
tW
HIGH-LOW-HIGH
PULSE
1.5V
3V
1.5V
0V
tH
2534 drw 06
2534 drw 05
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
VOH
1.5V
VOL
DISABLE
3V
1.5V
0V
CONTROL
INPUT
tPZL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
SWITCH
CLOSED
tPLZ
tPZH
OUTPUT
NORMALLY
HIGH
2534 drw 07
SWITCH
OPEN
3.5V
3.5V
1.5V
0.3V
VOL
tPHZ
0.3V
1.5V
0V
VOH
0V
2534 drw 08
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns
6.9
7
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
ORDERING INFORMATION
IDT
XX
Temperature
Range
FCT
X
X
X
X
Family
Device
Type
Package
Process
Blank
B
Commercial
MIL-STD-883, Class B
P
D
SO
L
E
PY
Q
Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
Shrink Small Outline Package
Quarter-size Small Outline Package
245T Non-Inverting Octal Bidirectional Transceiver
640T Inverting Octal Bidirectional Transceiver
645T Non-Inverting Octal Bidirectional Transceiver
245AT
640AT
645AT
245CT
640CT
645CT
245DT
645DT
Blank
2
High Drive
Balanced Drive
54
74
–55°C to +125°C
0°C to +70°C
2539 drw 09
6.9
8
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