FAST CMOS
8-INPUT MULTIPLEXER
Integrated Device Technology, Inc.
IDT54/74FCT151T/AT/CT
FEATURES:
•
•
•
•
•
Std., A, and C speed grades
Low input and output leakage
≤1µA
(max.)
Extended commercial range of –40°C to +85°C
CMOS power levels
True TTL input and output compatibility
– V
OH
= 3.3V (typ.)
– V
OL
= 0.3V (typ.)
High drive outputs (-15mA I
OH
, 48mA I
OL
)
Power off disable outputs permit “live insertion”
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, CERPACK and LCC packages
DESCRIPTION:
The IDT54/74FCT151T/AT/CT are high-speed 8-input mul-
tiplexers built using an advanced dual metal CMOS technol-
ogy. They select one bit of data from up to eight sources under
the control of three select inputs. Both assertion and negation
outputs are provided.
The IDT54/74FCT151T/AT/CT has a common Active-LOW
enable (
E
) input. When
E
is LOW, data from one of eight inputs
is routed to the complementary outputs according to the 3-bit
code applied to the Select (S
0
-S
2
) inputs. A common appli-
cation of the ‘FCT151 is data routing from one of eight
sources.
•
•
•
•
•
•
FUNCTIONAL BLOCK DIAGRAM
I
7
I
6
I
5
Z
I
4
Z
I
3
I
2
I
1
I
0
S
2
S
1
S
0
E
2635 drw 01
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
©1997
Integrated Device Technology, Inc.
SEPTEMBER 1996
DSC-2635/5
6.5
1
IDT54/74FCT151T/AT/CT
FAST CMOS 8-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN CONFIGURATIONS
NC
V
CC
INDEX
I
2
I
3
I
2
I
1
I
0
Z
Z
1
2
3
4
5
6
7
8
P16-1
D16-1
SO16-1
&
E16-1
16
15
14
13
12
11
10
9
V
CC
I
4
I
5
I
6
I
7
S
0
S
1
S
2
I
1
I
0
NC
Z
4
5
6
7
8
L20-2
3 2
1
20 19
18
17
16
15
14
9 10 11 12 13
NC
GND
S
2
S
1
E
I
3
I
4
I
5
I
6
NC
I
7
S
0
E
GND
z
DIP/SOIC/CERPACK
TOP VIEW
2635 drw 02
2635 drw 03
LCC
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
Description
V
TERM(2)
Terminal Voltage with Respect to
GND
V
TERM(3)
Terminal Voltage with Respect to
GND
T
STG
Storage Temperature
I
OUT
DC Output Current
Max.
–0.5 to +7.0
–0.5 to
V
CC
+0.5
–65 to +150
–60 to +120
Unit
V
V
°C
mA
PIN DESCRIPTION
Pin Names
I
0
- I
7
S
0
- S
2
E
Description
Data Inputs
Selects Inputs
Enable Input (Active LOW)
Data Output
Inverted Data Output
2635 tbl 03
Z
Z
2635 lnk 01
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS 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
V
CC
by +0.5V unless otherwise noted.
2. Input and V
CC
terminals only.
3. Outputs and I/O terminals only.
FUNCTION TABLE
(1)
Inputs
S
2
X
L
L
L
L
H
H
H
H
S
1
X
L
L
H
H
L
L
H
H
S
0
X
L
H
L
H
L
H
L
H
E
Outputs
Z
L
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
Z
CAPACITANCE
(T
A
= +25°C, f = 1.0MHz)
Symbol
Parameter
(1)
C
IN
Input
Capacitance
C
OUT
Output
Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
6
8
Max. Unit
10
pF
12
pF
2635 lnk 02
H
L
L
L
L
L
L
L
L
H
I
0
I
1
I
2
I
3
I
4
I
5
I
6
I
7
NOTE:
1. This parameter is measured at characterization but not tested.
NOTE:
2635 tbl 04
1. H = HIGH Voltage Level, L = LOW Voltage Level, X = Don’t care, Z =
High Impedance.
6.5
2
IDT54/74FCT151T/AT/CT
FAST CMOS 8-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: T
A
= –40°C to +85°C, V
CC
= 5.0V
±
5%; Military: T
A
= –55°C to +125°C, V
CC
= 5.0V
±
10%
Symbol
V
IH
V
IL
I
I H
I
I L
I
OZH
I
OZL
I
I
V
IK
I
OS
V
OH
Input HIGH Current
(4)
Clamp Diode Voltage
Short Circuit Current
Output HIGH Voltage
V
CC
= Min., I
N
= –18mA
V
CC
= Max.
(3)
, V
O
= GND
V
CC
= Min.
V
IN
= V
IH
or V
IL
I
OH
= –6mA MIL.
I
OH
= –8mA COM'L.
I
OH
= –12mA MIL.
I
OH
= –15mA COM'L.
V
OL
V
H
I
CC
Output LOW Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
= Max.
V
IN
= GND or V
CC
V
CC
= Min.
V
IN
= V
IH
or V
IL
—
Parameter
Input HIGH Level
Input LOW Level
Input HIGH Current
(4)
Input LOW Current
(4)
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
I
= 2.7V
V
I
= 0.5V
V
O
= 2.7V
V
O
= 0.5V
V
CC
= Max., V
I
= V
CC
(Max.)
Min.
2.0
—
—
—
—
—
—
—
–60
2.4
2.0
—
—
—
Typ.
(2)
—
—
—
—
—
—
—
–0.7
–120
3.3
3.0
0.3
200
0.01
Max.
—
0.8
±1
±1
±1
±1
20
–1.2
–225
—
—
0.5
—
1
Unit
V
V
µA
µA
µA
µA
V
mA
V
V
V
mV
mA
2635 tbl 05
High Impedance Output Current
(4)
V
CC
= Max.
I
OL
= 32mA MIL.
I
OL
= 48mA COM'L.
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 V
CC
= 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. The test limit for this parameter is
±5µA
at T
A
= -55°C.
6.5
3
IDT54/74FCT151T/AT/CT
FAST CMOS 8-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
∆I
CC
I
CCD
Parameter
QuiescentPower Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current
(4)
Test Conditions
(1)
V
CC
= Max.
V
IN
= 3.4V
(3)
V
CC
= Max.
Outputs Open
E
or
OE
= GND
One Bit Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
fi = 10MHz
50% Duty Cycle
E
or
OE
= GND
One Input Toggling
Min.
—
V
IN
= V
CC
V
IN
= GND
—
Typ.
(2)
0.5
0.15
Max.
2.0
0.25
Unit
mA
mA/
MHz
I
C
Total Power Supply Current
(5)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
—
3.2
6.5
mA
—
3.5
7.5
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 V
CC
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V). All other inputs at V
CC
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 I
CC
formula. These limits are guaranteed but not tested.
6. I
C
= I
QUIESCENT
+ I
INPUTS
+ I
DYNAMIC
I
C
= I
CC
+
∆I
CC
D
H
N
T
+ I
CCD
(f
CP/
2 + f
i
N
O
)
I
CC
= Quiescent Current
∆I
CC
= Power Supply Current for a TTL High Input (V
IN
= 3.4V)
D
H
= Duty Cycle for TTL Inputs High
N
T
= Number of TTL Inputs at D
H
I
CCD
= Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
CP
= Clock Frequency for Register Devices (Zero for Non-Register Devices)
f
i
= Input Frequency
N
O
= Number of Inputs at f
i
All currents are in milliamps and all frequencies are in megahertz.
2635 tbl 06
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
IDT54/74FCT151T
Com'l.
Symbol
Parameter
t
PLH
P
ropagation Delay
t
PHL
S
N
to
Z
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
P
ropagation Delay
IDT54/74FCT151AT
Com'l.
Min.(2)
Max.
IDT54/74FCT151CT
Com'l.
Min.(2)
Max.
Mil.
Min.(2)
Max.
Mil.
Min.(2)
Max.
Mil.
Min. (2)
Max.
Condition(1)
C
L
= 50pF
R
L
= 500Ω
Min.(2)
Max.
Unit
ns
ns
ns
ns
ns
ns
1.5
9.0
1.5 10.0
1.5 11.5
1.5
7.5
1.5
1.5
1.5
1.5
1.5
1.5
6.6
6.8
5.6
5.8
5.2
5.5
1.5
1.5
1.5
1.5
1.5
1.5
7.4
7.6
6.3
6.6
5.8
6.1
1.5
1.5
1.5
1.5
1.5
1.5
5.6
5.8
4.8
5.0
4.4
4.7
1.5
1.5
1.5
1.5
1.5
1.5
6.2
6.5
5.4
5.7
4.9
5.2
S
N
to Z
P
ropagation Delay
E
to
Z
P
ropagation Delay
E
to Z
P
ropagation Delay
I
N
to
Z
P
ropagation Delay
I
N
to Z
1.5 10.5
1.5
1.5
1.5
1.5
7.0
9.5
6.5
7.5
1.5 11.0
1.5
1.5
7.5
9.0
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
2635 tbl 07
6.5
4
IDT54/74FCT151T/AT/CT
FAST CMOS 8-INPUT MULTIPLEXER
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
V
CC
500Ω
V
IN
Pulse
Generator
R
T
D.U.T.
50pF
C
L
2635 drw 04
SWITCH POSITION
7.0V
Test
Open Drain
Disable Low
Enable Low
All Other Tests
Switch
Closed
Open
V
OUT
500Ω
2635 lnk 08
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
=
Termination resistance: should be equal to Z
OUT
of the Pulse
Generator.
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
t
SU
t
H
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
2635 drw 05
LOW-HIGH-LOW
PULSE
t
W
HIGH-LOW-HIGH
PULSE
1.5V
t
REM
1.5V
2635 drw 06
t
SU
t
H
PROPAGATION DELAY
3V
1.5V
0V
V
OH
1.5V
V
OL
3V
1.5V
0V
2635 drw 07
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
CONTROL
INPUT
t
PZL
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
CLOSED
t
PZH
SWITCH
OPEN
1.5V
0V
0V
2635 drw 08
SAME PHASE
INPUT TRANSITION
t
PLH
OUTPUT
t
PLH
OPPOSITE PHASE
INPUT TRANSITION
t
PHL
t
PHL
1.5V
t
PLZ
3.5V
1.5V
t
PHZ
0.3V
V
OH
0V
3.5V
0.3V
V
OL
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-
HIGH
2. Pulse Generator for All Pulses: Rate
≤
1.0MHz; t
F
≤
2.5ns; t
R
≤
2.5ns
6.5
5
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