Integrated Device Technology, Inc.
DESCRIPTION:
The IDT54/74FCT139T/AT/CT are dual 1-of-4 decoders
built using an advanced dual metal CMOS technology. These
devices have two independent decoders, each of which
accept two binary weighted inputs (A0-A1) and provide four
mutually exclusive active LOW outputs (
O
0-
O
3). Each de-
coder has an active LOW enable (
E
). When
E
is HIGH, all
outputs are forced HIGH.
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL
1-OF-4 DECODER
WITH ENABLE
FUNCTIONAL BLOCK DIAGRAM PIN CONFIGURATIONS
MILITARY AND COMMERCIAL TEMPERATURE RANGES APRIL 1995
1995 Integrated Device Technology, Inc. 6.4 DSC-4218/3
EaA0a A1a
O0a O1a O2a O3a
EbA0b A1b
O0b O1b O2b O3b
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2566 drw 02
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O3b
INDEX
A1a
A1b
Ea
NC
VCC
LCC
TOP VIEW
3 2 20 19
1
4
5
6
7
8
18
17
16
15
14
9 10111213
L20-2
O0a
NC
O1a
O2a
A0b
NC
O0b
O1b
A0a
O3a
O2b
GND
NC
Eb
1
FEATURES:
• Std., A and C speed grades
• Low input and output leakage ≤1µA (max.)
• CMOS power levels
• True TTL input and output compatibility
– VOH = 3.3V (typ.)
– VOL = 0.3V (typ.)
• High drive outputs (-15mA IOH, 48mA IOL)
• 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
GND
E
a
E
b
O
3b
V
CC
1
2
3
4
5
6
7
89
10
11
12
13
14
15
16
DIP/SOIC/QSOP/CERPACK
TOP VIEW
P16-1
D16-1
SO16-1
SO16-7
&
E16-1
A
0a
A
1a
O
0a
O
1a
O
2a
O
3a
A
0b
A
1b
O
0b
O
1b
O
2b
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
6.4 2
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
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%
NOTES: 2566 tbl 05
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. The test limit for this parameter is ±5µA at TA = –55°C.
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
VIH Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
II H Input HIGH Current(4) VCC = Max. VI = 2.7V — — ±1µA
II L Input LOW Current(4) VCC = Max. VI = 0.5V — — ±1µA
II Input HIGH Current(4) VCC = Max., VI = VCC (Max.) — — ±1µA
VIK Clamp Diode Voltage VCC = Min., IN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max.(3), VO = GND –60 –120 –225 mA
VOH Output HIGH Voltage VCC = Min.
VIN = VIH or VIL IOH = –6mA MIL.
IOH = –8mA COM'L. 2.4 3.3 — V
IOH = –12mA MIL.
IOH = –15mA COM'L. 2.0 3.0 — V
VOL Output LOW Voltage VCC = Min.
VIN = VIH or VIL IOL = 32mA MIL.
IOL = 48mA COM'L. — 0.3 0.5 V
VHInput Hysteresis —— 200 — mV
ICC Quiescent Power Supply Current VCC = Max.
VIN = GND or VCC — 0.01 1 mA
CAPACITANCE (TA = +25°C, f = 1.0MHz)
NOTE:
1. This parameter is measured at characterization but not tested.
2566 lnk 04
Symbol Parameter(1) Conditions Typ. Max. Unit
CIN Input
Capacitance VIN = 0V 6 10 pF
COUT Output
Capacitance VOUT = 0V 8 12 pF
PIN DESCRIPTION
2566 tbl 01
ABSOLUTE MAXIMUM RATINGS(1)
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
VCC by +0.5V unless otherwise noted.
2. Input and VCC terminals only.
3. Outputs and I/O terminals only.
Symbol Rating Commercial Military Unit
VTERM(2) Terminal Voltage
with Respect to
GND
–0.5 to +7.0 –0.5 to +7.0 V
VTERM(3) Terminal Voltage
with Respect to
GND
–0.5 to
VCC +0.5 –0.5 to
VCC +0.5 V
TAOperating
Temperature 0 to +70 –55 to +125 °C
TBIAS Temperature
Under Bias –55 to +125 –65 to +135 °C
TSTG Storage
Temperature –55 to +125 –65 to +150 °C
PTPower Dissipation 0.5 0.5 W
IOUT DC Output
Current –60 to +120 –60 to +120 mA
2566 lnk 03
FUNCTION TABLE(1)
NOTE: 2566 tbl 02
1. H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care
Pin Names Description
A0, A1Address Inputs
E
Enable Input (Active LOW)
O
0 -
O
3Outputs (Active LOW)
Inputs Outputs
E
E
A0A1
O
O
0
O
O
1
O
O
2
O
O
3
HXX H H H H
LLLL HHH
LHL H L H H
LLHHHL H
LHHH H H L
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.4 3
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions(1) Min. Typ.(2) Max. Unit
∆ICC Quiescent Power Supply Current
TTL Inputs HIGH VCC = Max.
VIN = 3.4V(3) — 0.5 2.0 mA
ICCD Dynamic Power Supply
Current(4) VCC = Max.
Outputs Open
One Bit Toggling
50% Duty Cycle
VIN = VCC
VIN = GND — 0.15 0.3 mA/
MHz
ICTotal Power Supply Current(6) VCC = Max.
Outputs Open
fo = 10MHz
VIN = VCC
VIN = GND — 1.5 4.0 mA
50% Duty Cycle
One Input and
One Output Toggling
VIN = 3.4V
VIN = GND — 1.8 5.0
VCC = Max.
Outputs Open
fo = 10MHz
VIN = VCC
VIN = GND — 3.0 7.0(5)
50% Duty Cycle
One Input Toggling
on Each Decoder
Two Outputs Toggling
VIN = 3.4V
VIN = GND — 3.5 9.0(5)
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
NOTES: 2566 tbl 07
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
2566 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 Input 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.
FCT139T FCT139AT FCT139CT
Com'l. Mil. Com'l. Mil. Com'l. Mil.
Parameter Description Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
tPLH
tPHL Propagation Delay
A0 or A1 to
O
nCL = 50pF
RL = 500Ω1.5 9.0 1.5 12.0 1.5 5.9 1.5 7.8 1.5 5.0 1.5 6.2 ns
tPLH
tPHL Propagation Delay
E
to
O
n1.5 8.0 1.5 9.0 1.5 5.5 1.5 7.2 1.5 4.8 1.5 5.8 ns
6.4 4
MILITARY AND COMMERCIAL TEMPERATURE RANGES
IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
ENABLE AND DISABLE TIMESPROPAGATION DELAY
SET-UP, HOLD AND RELEASE TIMES PULSE WIDTH
SWITCH POSITION
Pulse
Generator
R
T
D.U.T.
V
CC
V
IN
C
L
V
OUT
50pF 500
Ω
500
Ω
7.0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
DATA
INPUT
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
t
SU
t
H
t
REM
t
SU
t
H
HIGH-LOW-HIGH
PULSE
LOW-HIGH-LOW
PULSE
t
W
1.5V
1.5V
SAME PHASE
INPUT TRANSITION
3V
1.5V
0V
1.5V
V
OH
t
PLH
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
3V
1.5V
0V
t
PLH
t
PHL
t
PHL
V
OL
CONTROL
INPUT
3V
1.5V
0V
3.5V
0V
OUTPUT
NORMALLY
LOW
OUTPUT
NORMALLY
HIGH
SWITCH
CLOSED
SWITCH
OPEN
V
OL
0.3V
0.3V
t
PLZ
t
PZL
t
PZH
t
PHZ
3.5V
0V
1.5V
1.5V
ENABLE DISABLE
V
OH
PRESET
CLEAR
CLOCK ENABLE
ETC.
Test
Switch
Disable Low
Enable Low
Closed
All Other Tests Open
Open Drain
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT =Termination resistance: should be equal to ZOUT of the Pulse
Generator.
2566 lnk 08
2566 drw 06
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control Disable-
HIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns
2566 drw 08
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IDT54/74FCT139T/AT/CT
FAST CMOS DUAL 1-OF-4 DECODER WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
6.4 5
ORDERING INFORMATION
XX
Temp. Range XXXX
Device Type X
Package X
Process
Blank
B
P
D
SO
L
E
Q
139T
139AT
139CT
Commercial
MIL-STD-883, Class B
Plastic DIP
CERDIP
Small Outline IC
Leadless Chip Carrier
CERPACK
Quarter-size Small Outline Package
Dual 1-of-4 Decoder
54
74 –55°C to +125°C
0°C to +70°C
FCT
IDT X
Family
Blank High Drive
2566 drw 09
