IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGE
FAST CMOS
1-OF-4 DECODER
WITH ENABLE
FEATURES:
−
−
−
−
−
−
−
−
−
−
Std., A and C speed grades
Low input and output leakage
≤1µ
A (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
)
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, QSOP, CERPACK and LCC packages
IDT54/74FCT139T/AT/CT
DESCRIPTION:
The IDT54/74FCT139T/AT/CT are dual 1-of-4 decoders built using an
advanced dual metal CMOS technology. These devices have two inde-
pendent decoders, each of which accept two binary weighted inputs (A
0
-
A
1
) and provide four mutually exclusive active low outputs (O
0
-O
3
). Each
decoder has an active low enable (E). When
E
is high, all outputs are forced
high.
FUNCTIONAL BLOCK DIAGRAM
E
a
A
0a
A
1a
E
b
A
0b
A
1b
O
0a
O
1a
O
2a
O
3a
O
0b
O
1b
O
2b
O
3b
MILITARY AND COMMERCIAL TEMPERATURE RANGE
1
c
1999 Integrated Device Technology, Inc.
SEPTEMBER 1999
DSC-2566/5
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGE
PIN CONFIGURATION
A
0a
NC
E
a
1
2
3
4
5
6
7
8
P16-1
D16-1
SO16-1
SO16-7
SO16-8
E16-1
E
a
A
0a
A
1a
O
0a
O
1a
O
2a
O
3a
GND
16
15
14
13
12
11
10
9
V
CC
E
b
A
1a
A
0b
A
1b
O
0b
O
1b
O
2b
O
3b
O
0a
NC
O
1a
O
2a
4
5
6
7
8
9
10
11
12
13
L20-2
3
2
1
20
19
18
17
16
15
14
E
b
IND EX
V
CC
A
0b
A
1b
NC
O
0b
O
1b
O
3a
O
3b
O
1
H
H
L
H
H
GND
DIP/ SOIC/ QSOP/ CERPACK
TOP VIEW
LCC
TOP VIEW
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
TERM(2)
V
TERM(3)
T
STG
I
OUT
Rating
Terminal Voltage with Respect to GND
Terminal Voltage with Respect to GND
Storage Temperature
DC Output Current
Max.
–0.5 to +7
–0.5 to V
CC
+0.5
–65 to +150
–65 to +120
Unit
V
V
°C
mA
8T-link
PIN DESCRIPTION
Pin Names
A
0
, A
1
E
O
0
-
O
3
Description
Address Inputs
Enable Input (Active LOW)
Outputs (Active LOW)
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. Inputs and Vcc terminals only.
3. Outputs and I/O terminals only.
FUNCTION TABLE
E
H
L
L
L
L
Inputs
A
0
X
L
H
L
H
A
1
X
L
L
H
H
O
0
H
L
H
H
H
(1)
Outputs
O
2
H
H
H
L
H
O
3
H
O
2b
NC
H
H
H
L
CAPACITANCE
(T
A
= +25
O
C, f = 1.0MHz)
Symbol
C
IN
C
OUT
Parameter
(1)
Input Capacitance
Output Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Typ.
6
8
Max.
10
12
Unit
pF
pF
8T-link
NOTE:
1. H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
NOTE:
1. This parameter is measured at characterization but not tested.
2
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGE
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
IH
I
IL
I
I
V
IK
I
OS
V
OH
Parameter
Input HIGH Level
Input LOW Level
Input HIGH Current
(4)
Input LOW Current
(4)
Input HIGH Current
(4)
Clamp Diode Voltage
Short Circuit Current
Output HIGH Voltage
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max.
V
CC
= Max.
V
CC
= Max., V
I
= V
CC
(Max.)
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
I
OL
= 32mA MIL
I
OL
= 48mA COM'L
—
V
I
= 2.7V
V
I
= 0.5V
Min.
2
—
—
—
—
—
–60
2.4
2
—
—
—
Typ.
(2)
—
—
—
—
—
–0.7
–120
3.3
3
0.3
200
0.01
Max.
—
0.8
±1
±1
±1
–1.2
–225
—
—
0.5
—
1
Unit
V
V
µA
µA
µA
V
mA
V
V
V
mV
mA
V
OL
V
H
I
CC
Output LOW Voltage
Input Hysteresis
Quiescent Power Supply Current
V
CC
= Min.
V
IN
= V
IH
or V
IL
V
CC
= Max.
V
IN
=
GND or
V
CC
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.
3
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGE
POWER SUPPLY CHARACTERISTICS
Symbol
∆I
CC
I
CCD
Parameter
Quiescent Power 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
One Bit Toggling
50% Duty Cycle
V
CC
= Max.
Outputs Open
f
o
= 10MHz
50% Duty Cycle
One Input and
One Output Toggling
V
CC
= Max.
Outputs Open
f
o
= 10MHz
50% Duty Cycle
One Input Toggling
on Each Decoder
Two Outputs Toggling
Min.
—
—
Typ.
(2)
0.5
0.15
Max.
2
0.3
Unit
mA
mA/
MHz
V
IN
= V
CC
V
IN
= GND
I
C
Total Power Supply Current
(6)
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
V
IN
= V
CC
V
IN
= GND
V
IN
= 3.4V
V
IN
= GND
—
1.5
4
mA
—
1.8
5
—
3
7
(5)
—
3.5
9
(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
O
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
O
= Output Frequency
N
O
= Number of Outputs at f
O
All currents are in milliamps and all frequencies are in megahertz.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT139T
Com'l.
Parameter
t
PLH
t
PHL
t
PLH
t
PHL
Description
Propagation Delay
A
0
or A
1
to
On
Propagation Delay
E
to
O
n
Condition
(1)
C
L
= 50pF
R
L
= 500Ω
Mil.
FCT139AT
Com'l.
Mil.
FCT139CT
Com'l.
Mil.
Min
. (2)
Max
.
Min
. (2)
Max
.
Min
. (2)
Max
.
Min
. (2)
Max
.
Min
. (2)
Max
.
Min
. (2)
Max
.
Unit
1.5
9
1.5
12
1.5
5.9
1.5
7.8
1.5
5
1.5
6.2
ns
1.5
8
1.5
9
1.5
5.5
1.5
7.2
1.5
4.8
1.5
5.8
ns
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
4
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGE
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
V
CC
500
Ω
V
IN
Pulse
Generator
D.U.T.
50pF
R
T
SWITCH POSITION
Test
Open Drain
Disable Low
Enable Low
All Other Tests
Open
8-link
7.0V
Switch
Closed
V
OUT
500
Ω
C
L
DEFINITIONS:
C
L
= Load capacitance: includes jig and probe capacitance.
R
T
= Termination resistance: should be equal to Z
OUT
of the Pulse
Generator.
O ctal lin k
SET-UP, HOLD, AND RELEASE TIMES
DATA
INPUT
t
SU
TIM ING
INPUT
ASYNCHRONOUS C ONTROL
PRES ET
CLEAR
ETC.
SYNCHRO NOUS CONTRO L
PRES ET
CLEAR
CLOCK ENABLE
ETC.
t
REM
t
H
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
O ctal lin k
PULSE WIDTH
LO W -HIGH-LOW
PULSE
t
W
HIGH-LOW -HIGH
PULSE
O ctal lin k
1.5V
1.5V
t
SU
t
H
PROPAGATION DELAY
SAM E PHASE
INPUT TRANSITION
t
PLH
OUTPUT
t
PLH
OPPOSITE P HASE
INPUT TRANSITION
t
PH L
t
PH L
3V
1.5V
0V
V
OH
1.5V
V
OL
3V
1.5V
0V
O ctal lin k
ENABLE AND DISABLE TIMES
ENAB LE
DISA BLE
3V
CO NTROL
INPUT
t
PZL
OUTPUT
NO RM A LLY
LO W
SW ITCH
CLOSE D
t
PZH
OUTPUT
NO RM A LLY
HIGH
SW ITCH
OPEN
3.5V
1.5V
0.3V
t
PHZ
0.3V
1.5V
0V
0V
O ctal lin k
1.5V
t
PLZ
0V
3.5V
V
OL
V
OH
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
5
