IDT IDT74FCT257DTQB Fast cmos quad 2-input multiplexer Datasheet

IDT54/74FCT157T/AT/CT/DT
IDT54/74FCT257T/AT/CT/DT
IDT54/74FCT2257T/AT/CT
FAST CMOS
QUAD 2-INPUT
MULTIPLEXER
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 FCT157T/257T:
– Std., A, C and D speed grades
– High drive outputs (-15mA IOH, 48mA IOL)
• Features for FCT2257T:
– Std., A, and C speed grades
– Resistor outputs (-15mA IOH, 12mA IOL Com.)
(-12mA IOH, 12mA IOL Mil.)
– Reduced system switching noise
The FCT157T, FCT257T/FCT2257T are high-speed quad
2-input multiplexers built using an advanced dual metal CMOS
technology. Four bits of data from two sources can be
selected using the common select input. The four buffered
outputs present the selected data in the true (non-inverting)
form.
The FCT157T has a common, active-LOW, enable input.
When the enable input is not active, all four outputs are held
LOW. A common application of ‘FCT157T is to move data
from two different groups of registers to a common bus.
Another application is as a function generator. The ‘FCT157T
can generate any four of the 16 different functions of two
variables with one variable common.
The FCT257T/FCT2257T have a common Output Enable
(OE) input. When OE is HIGH, all outputs are switched to a
high-impedance state allowing the outputs to interface directly
with bus-oriented systems.
The FCT2257T has balanced output drive with current
limiting resistors. This offers low ground bounce, minimal
undershoot and controlled output fall times-reducing the need
for external series terminating resistors. FCT2xxxT parts are
plug-in replacements for FCTxxxT parts.
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
S
I 0A
I 1A
ZA
I 0B
I 1B
ZB
GND
S
E
3 other multiplexers
I1B –I1D
Z B–Z D
16
2
15
P16-1,
D16-1,
SO16-1,
SO16-7
&
E16-1
3
4
5
6
7
13
12
11
10
9
8
DIP/SOIC/QSOP/CERPACK
TOP VIEW
I0B –I0D
I 1A
ZA
INDEX
I 0A
3
257 Only
14
Vcc
E or OE*
I 0C
I 1C
ZC
I 0D
I 1D
ZD
I 1A
ZA
NC
I 0B
I 1B
OE
4
5
6
2
1
20 19
18
L20-2
17
16
7
15
8
14
9 10 11 12 13
I 0C
I 1C
NC
ZC
I 0D
ZB
GND
NC
ZD
I1D
2537 drw 01
2537 drw 02
I0A
S
NC
Vcc
E or OE*
157 Only
1
LCC
TOP VIEW
*
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1996 Integrated Device Technology, Inc.
6.6
E
2537 drw 03
for FCT157, OE for FCT257/FCT2257.
JUNE 1996
2537/6
1
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
FUNCTION TABLE(1)
PIN DESCRIPTION
Pin Names
MILITARY AND COMMERCIAL TEMPERATURE RANGES
Description
Inputs
Output ZN
I0A–I0D
Source 0 Data Inputs
E OE
/
S
I0
I1
157
257
I1A–I1D
Source 1 Data Inputs
H
X
X
X
L
Z
E
Enable Input (Active LOW)–FCT157T
L
H
X
L
L
L
OE
Output Enable (Active LOW)–FCT257T/2257T
L
H
X
H
H
H
S
Select Input
L
L
L
X
L
L
ZA–ZD
Outputs
L
L
H
X
H
H
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
2537 tbl 01
ABSOLUTE MAXIMUM RATINGS(1)
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
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
DC Output
Current
–60 to +120
2537 tbl 02
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
2537 lnk 04
2537 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.
6.6
2
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
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
VIL
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Input LOW Level
Input HIGH
Current (4)
II L
Input LOW
Current (4)
I OZH
High Impedance Output Current
II H
I OZL
(3-State Output
Min.
2.0
Typ.(2)
—
Max.
—
Unit
V
Guaranteed Logic LOW Level
—
—
0.8
V
VCC = Max.
—
—
±1
µA
VI = 2.7V
VCC = Max.
pins) (4)
Current (4)
II
Input HIGH
VIK
Clamp Diode Voltage
VH
Input Hysteresis
I CC
Quiescent Power Supply Current
VI = 0.5V
—
—
±1
VO = 2.7V
—
—
±1
VO = 0.5V
—
—
±1
µA
VCC = Max., VI = VCC (Max.)
—
—
±1
µA
VCC = Min., IIN = –18mA
—
–0.7
–1.2
V
—
—
200
—
mV
—
0.01
1
VCC = Max., VIN = GND or VCC
mA
2537 lnk 05
OUTPUT DRIVE CHARACTERISITICS FOR FCT157/257T
VOL
Output LOW Voltage
IOS
Short Circuit Current
Test Conditions(1)
VCC = Min.
IOH = –6mA MIL.
VIN = VIH or VIL
IOH = –8mA COM'L.
IOH = –12mA MIL.
IOH = –15mA COM'L.
VCC = Min.
IOL = 32mA MIL.
VIN = VIH or VIL
IOL = 48mA COM'L.
VCC = Max., VO = GND (3)
IOFF
Input/Output Power Off Leakage(5)
VCC = 0V, VIN or VO ≤ 4.5V
Symbol
VOH
Parameter
Output HIGH Voltage
Min.
2.4
Typ.(2)
3.3
Max.
—
Unit
V
2.0
3.0
—
V
—
0.3
0.50
V
–60
–120
–225
mA
—
—
±1
µA
2537 tbl 06
OUTPUT DRIVE CHARACTERISTICS FOR FCT2257T
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.
5. This parameter is guaranteed but not tested.
6.6
2537 lnk 07
3
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
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)
Min.
—
Typ.(2)
0.5
Max.
2.0
Unit
mA
FCTxxxT
—
0.15
0.25
mA/
MHz
FCT2xxxT
—
0.06
0.12
VIN = VCC
FCTxxxT
—
1.5
3.5
VIN = GND
FCT2xxxT
—
0.6
2.2
VIN = 3.4
FCTxxxT
—
1.8
4.5
One Bit Toggling
VIN = GND
FCT2xxxT
VCC = Max.
VIN = VCC
FCTxxxT
Outputs Open
VIN = GND
VCC = Max.
VIN = 3.4(3)
VCC = Max.
Outputs Open
E or OE = GND
One Bit Toggling
50% Duty Cycle
VCC = Max.
Outputs Open
VIN = VCC
VIN = GND
mA
fO = 10MHz
50% Duty Cycle
E
or OE = GND
0.9
3.2
1.5
3.5 (5)
FCT2xxxT
0.6
2.2 (5)
VIN = 3.4
FCTxxxT
2.5
7.5 (5)
VIN = GND
FCT2xxxT
1.6
6.2 (5)
—
fO = 2.5MHz
50% Duty Cycle
E
or OE = GND
Four Bits Toggling
2537 tbl 06
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 (foNo)
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)
fo = Output Frequency
No = Number of Outputs at fo
All currents are in milliamps and all frequencies are in megahertz.
6.6
4
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE - FCT157T
FCT157T
Com'l.
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Condition(1)
Min.(2)
CL = 50pF
RL = 500Ω
1.5
Propagation Delay E to ZN
Propagation Delay S to ZN
Parameter
Propagation Delay IN to ZN
FCT157AT
Mil.
Max.
Min.(2)
6.0
1.5
1.5
10.5
1.5
10.5
Com'l.
Max.
Min.(2)
7.0
1.5
1.5
12.0
1.5
12.0
Mil.
Max.
Min.(2)
Max.
Unit
5.0
1.5
5.8
ns
1.5
6.0
1.5
7.4
ns
1.5
7.0
1.5
8.1
ns
2537 tbl 07
FCT157CT
Com'l.
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Condition(1)
Min.(2)
CL = 50pF
RL = 500Ω
1.5
Propagation Delay E to ZN
Propagation Delay S to ZN
Parameter
Propagation Delay IN to ZN
FCT157DT
Mil.
Max.
Min.(2)
4.3
1.5
1.5
4.8
1.5
5.2
Com'l.
Max.
Min.(2)
5.0
1.5
1.5
5.9
1.5
6.0
Mil.
Max.
Min.(2)
Max.
Unit
3.9
—
—
ns
1.5
4.4
—
—
ns
1.5
4.6
—
—
ns
2537 tbl 08
SWITCHING CHARACTERISTICS OVER OPERATING RANGE – FCT257/2257T
FCT257/2257T
Com'l.
Symbol
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
FCT257/2257AT
Mil.
Com'l.
Mil.
Condition(1)
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Min.(2)
Max.
Unit
CL = 50pF
RL = 500Ω
1.5
6.0
1.5
7.0
1.5
5.0
1.5
5.8
ns
Propagation Delay S to ZN
1.5
10.5
1.5
12.0
1.5
7.0
1.5
8.1
ns
Output Enable Time
1.5
8.5
1.5
10.0
1.5
7.0
1.5
8.0
ns
Output Disable Time
1.5
6.0
1.5
8.0
1.5
5.5
1.5
5.8
ns
Parameter
Propagation Delay IN to ZN
2537 tbl 09
FCT257/2257CT
Com'l.
Symbol
tPLH
tPHL
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Condition(1)
Min.(2)
CL = 50pF
RL = 500Ω
1.5
Propagation Delay S to ZN
Mil.
Max.
Min.(2)
4.3
1.5
1.5
5.2
Output Enable Time
1.5
Output Disable Time
1.5
Parameter
Propagation Delay IN to ZN
NOTES:
1. See test circuits and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delay.
FCT257DT
Com'l.
Max.
Min.(2)
5.0
1.5
1.5
6.0
6.0
1.5
5.0
1.5
Mil.
Max.
Min.(2)
Max.
Unit
3.9
—
—
ns
1.5
4.4
—
—
ns
6.8
1.5
4.4
—
—
ns
5.3
1.5
4.4
—
—
ns
2537 tbl 10
6.6
5
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT- 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
V CC
500Ω
Switch
Open Drain
Disable Low
Closed
Enable Low
V OUT
VIN
Pulse
Generator
Test
7.0V
Open
All Other Tests
D.U.T.
50pF
RT
2537 lnk 11
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
500Ω
CL
2537 drw 04
SET-UP, HOLD AND RELEASE TIMES
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tREM
tSU
PULSE WIDTH
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
1.5V
tW
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
3V
1.5V
0V
tH
2537 drw 06
2537 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
3.5V
1.5V
tPZH
OUTPUT
NORMALLY
HIGH
2537 drw 07
SWITCH
OPEN
3.5V
0.3V
VOL
tPHZ
0.3V
1.5V
0V
VOH
0V
2537 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
6.6
6
IDT54/74FCT157T/AT/CT/DT, IDT54/74FCT257T/AT/CT/DT - 2257T/AT/CT
FAST CMOS QUAD 2-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT
XX
FCT
Temperature
Range
X
XXXX
X
X
Family
Device
Type
Package
Process
Blank
B
Commercial
MIL-STD-883, Class B
P
D
SO
L
E
Q
Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
Quarter-size Small Outline Package
Quad 2-Input Multiplexer
157T
Quad 2-Input Multiplexer (3-state)
257T
157AT
257AT
157CT
257CT
157DT
257DT
Blank
2
High Drive
Balanced Drive
54
74
–55°C to +125°C
0°C to +70°C
2537 drw 09
6.6
7
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