Datasheet IDT54FCT138ATD, IDT54FCT138ATDB, IDT54FCT138ATE, IDT54FCT138ATEB, IDT54FCT138ATL Datasheet (Integrated Device Technology Inc)
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Integrated Device Technology, Inc.
FAST CMOS
1-OF-8 DECODER
WITH ENABLE
IDT54/74FCT138T/AT/CT
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 I
OH, 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
FUNCTIONAL BLOCK DIAGRAM
A2 A1 A0 E1 E2 E3
DESCRIPTION:
The IDT54/74FCT138T/AT/CT are 1-of-8 decoders built
using an advanced dual metal CMOS technology. The IDT54/
74FCT138T/AT/CT accepts three binary weighted inputs (A0,
A1, A2) and, when enabled, provides eight mutually exclusive
active LOW outputs (
features three enable inputs, two active LOW (
active HIGH (E3). All outputs will be HIGH unless
O0-O
7). The IDT54/74FCT138T/AT/CT
E
1, E2) and one
E
1 and E2 are
LOW and E3 is HIGH. This multiple enable function allows
easy parallel expansion of the device to a 1-of-32 (5 lines to
32 lines) decoder with just four IDT54/74FCT138T/AT/CT
devices and one inverter.
PIN CONFIGURATIONS
A
0
1
2
1
A
A
E
E
E
O
GND
2
1
2
3
7
P16-1
3
D16-1
4
SO16-1
SO16-7
5
6
E16-1
7
89
DIP/SOIC/QSOP/CERPACK
TOP VIEW
16
15
14
13
12
&
11
10
V
CC
O
0
O
1
O
2
O
3
O
4
O
5
O
6
2570 drw 02
O7 O6 O5 O4 O3 O2 O1 O0
2570 drw 01
INDEX
NC
A2
E
E3
E1
A0
A1
3 2 20 19
4
1
5
6
L20-2
2
7
8
NC
CC
V
0
O
18
17
16
15
14
O1
O2
NC
O
O4
3
9 10111213
O7
NC
GND
O5
O6
2570 drw 03
LCC
TOP VIEW
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES APRIL 1995
1995 Integrated Device Technology, Inc. 6.3 DSC-4213/5
1
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names Description
A0–A
E1,
E
3
O0–
2
E
2
O
7
Address Inputs
Enable Inputs (Active LOW)
Enable Input (Active HIGH)
Outputs (Active LOW)
2570 tbl 01
FUNCTION TABLE
Inputs
E
1
E
H
X
X
L
L
L
L
L
L
L
L
E
2 E3 A0 A1 A2
E
X
H
X
L
L
L
L
L
L
L
L
X
X
L
H
H
H
H
H
H
H
H
X
X
X
L
H
L
H
L
H
L
H
X
X
X
L
L
H
H
L
L
H
H
O
0
O
X
X
X
L
L
L
L
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
O
1
O
H
H
H
H
L
H
H
H
H
H
H
O
2
O
H
H
H
H
H
L
H
H
H
H
H
Outputs
O
3
O
H
H
H
H
H
H
L
H
H
H
H
O
4
O
H
H
H
H
H
H
H
L
H
H
H
O
5
O
H
H
H
H
H
H
H
H
L
H
H
O
6
O
H
H
H
H
H
H
H
H
H
L
H
O
7
O
H
H
H
H
H
H
H
H
H
H
L
2570 tbl 02
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol Rating Commercial Military Unit
(2)
VTERM
Terminal Voltage
–0.5 to +7.0 –0.5 to +7.0 V
with Respect to
GND
(3)
VTERM
TA Operating
Terminal Voltage
with Respect to
GND
–0.5 to
V
CC +0.5
–0.5 to
VCC +0.5
0 to +70 –55 to +125 °C
V
Temperature
TBIAS Temperature
–55 to +125 –65 to +135 °C
Under Bias
TSTG Storage
–55 to +125 –65 to +150 °C
Temperature
PT Power Dissipation 0.5 0.5 W
IOUT DC Output
–60 to +120 –60 to +120 mA
Current
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
CC by +0.5V unless otherwise noted.
V
2. Input and V
3. Outputs and I/O terminals only.
CC terminals only.
2570 lnk 03
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol Parameter
C
IN
Input
Capacitance
C
OUT
Output
Capacitance
NOTE:
1. This parameter is measured at characterization but not tested.
(1)
Conditions Typ. Max. Unit
VIN = 0V 6 10
V
OUT
= 0V 8 12
pF
pF
2570 lnk 04
6.3 2
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
DC ELECTRICAL CHARACTERISTICS OVER OPERATING RANGE
Following Conditions Apply Unless Otherwise Specified:
Commercial: T
Symbol Parameter Test Conditions
A = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC
(1)
VIH Input HIGH Level Guaranteed Logic HIGH Level 2.0 — — V
VIL Input LOW Level Guaranteed Logic LOW Level — — 0.8 V
(4)
(4)
(4)
VCC = Max. VI = 2.7V — — ±1 µA
VCC = Max. VI = 0.5V — — ±1 µA
VCC = Max., VI = VCC (Max.) — — ±1 µA
II H Input HIGH Current
II L Input LOW Current
II Input HIGH Current
VIK Clamp Diode Voltage VCC = Min., IN = –18mA — –0.7 –1.2 V
IOS Short Circuit Current VCC = Max.
VOH Output HIGH Voltage VCC = Min.
V
IN = VIH or VIL
(3)
, VO = GND –60 –120 –225 mA
IOH = –6mA MIL.
I
OH = –8mA COM'L.
IOH = –12mA MIL.
I
OH = –15mA COM'L.
VOL Output LOW Voltage VCC = Min.
V
IN = VIH or VIL
IOL = 32mA MIL.
I
OL = 48mA COM'L.
VH Input Hysteresis — — 200 — mV
ICC Quiescent Power Supply Current VCC = Max.
V
IN = GND or VCC
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
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
CC = 5.0V, +25°C ambient.
A = –55°C.
= 5.0V ± 10%
Min. Typ.
2.4 3.3 — V
2.0 3.0 — V
— 0.3 0.5 V
— 0.01 1 mA
(2)
Max. Unit
2570 tbl 05
6.3 3
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol Parameter Test Conditions
∆ICC Quiescent Power Supply Current
TTL Inputs HIGH
ICCD Dynamic Power Supply Current
(4)
VCC = Max.
V
IN = 3.4V
VCC = Max.
(3)
Outputs Open
(1)
V
IN = VCC
V
IN = GND
Min. Typ.
— 0.5 2.0 mA
— 0.15 0.3 mA/
One Bit Toggling
50% Duty Cycle
IC Total Power Supply Current
(6)
VCC = Max.
Outputs Open
Toggle
E
1, E2 or E3
50% Duty Cycle
fo = 10MHz
VIN = VCC
V
IN = GND
V
IN = 3.4V
V
IN = GND
— 1.5 4.0 mA
— 1.8 5.0
One Input and
One Output 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 V
3. Per TTL driven input (V
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
6. I
C = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (foNo)
I
CC = Quiescent Current
∆I
CC = Power Supply Current for a TTL High Input (VIN = 3.4V)
D
H = Duty Cycle for TTL Inputs High
N
T = Number of TTL Inputs at DH
ICCD = Dynamic Current Caused by an Input Transition Pair (HLH or LHL)
f
o = Output Frequency
N
o = Number of Outputs at fo
All currents are in milliamps and all frequencies are in megahertz.
CC = 5.0V, +25°C ambient.
IN = 3.4V). All other inputs at VCC or GND.
CC formula. These limits are guaranteed but not tested.
(2)
Max. Unit
MHz
2570 tbl 06
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT138T FCT138AT FCT138CT
Com'l. Mil. Com'l. Mil. Com'l. Mil.
Symbol Parameter Condition
t
PLH
Propagation Delay
t
PHL
t
PLH
t
PHL
t
PLH
t
PHL
n
A
Propagation Delay
1
E
Propagation Delay
3
E
to
or
to
O
n
E
2
to
O
n
O
n
CL = 50pF
L
= 500
R
(1)
Ω
(2)
Min.
Max. Min.
1.5 9.0 1.5 12.0 1.5 5.8 1.5 7.8 1.5 5.1 1.5 6.0 ns
1.5 9.0 1.5 12.5 1.5 5.9 1.5 8.0 1.5 5.2 1.5 6.1 ns
1.5 9.0 1.5 12.5 1.5 5.9 1.5 8.0 1.5 5.2 1.5 6.1 ns
NOTES: 2570 tbl 07
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max. Min.
(2)
Max.
Unit
6.3 4
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
Test
Open Drain
Disable Low
Enable Low
All Other Tests
Generator.
Pulse
Generator
V
CC
500
V
V
IN
OUT
D.U.T.
50pF
T
R
C
500
L
Ω
Ω
2570 drw 04
7.0V
DEFINITIONS:
L= Load capacitance: includes jig and probe capacitance.
C
R
T = Termination resistance: should be equal to ZOUT of the Pulse
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
t
REM
H
t
H
t
SU
t
SU
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
2570 drw 05
LOW-HIGH-LOW
PULSE
HIGH-LOW-HIGH
PULSE
Switch
Closed
Open
2570 tbl 08
1.5V
t
W
1.5V
2570 drw 06
SAME PHASE
INPUT TRANSITION
OUTPUT
OPPOSITE PHASE
INPUT TRANSITION
t
PLH
t
PLH
t
PHL
t
PHL
3V
1.5V
0V
OH
V
1.5V
V
OL
3V
1.5V
0V
2570 drw 07
ENABLE AND DISABLE TIMESPROPAGATION DELAY
ENABLE DISABLE
3V
CONTROL
INPUT
t
PHZ
PLZ
t
F ≤ 2.5ns; tR ≤ 2.5ns
t
PZL
OUTPUT
NORMALLY
OUTPUT
NORMALLY
HIGH
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; t
LOW
SWITCH
CLOSED
t
PZH
SWITCH
OPEN
3.5V
1.5V
1.5V
0V
0.3V
0.3V
1.5V
0V
3.5V
V
OL
V
OH
0V
2570 drw 08
6.3 5
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT XX FCT
Temp. Range
X
Family
XXXX
Device TypeXPackage
X
Process
Blank
B
P
D
SO
E
L
Q
138T
Commercial
MIL-STD-883, Class B
Plastic DIP
CERDIP
Small Outline IC
CERPACK
Leadless Chip Carrier
Quarter-size Small Outline Package
1-of-8 Decoder
138AT
138CT
Blank High Drive
54
74
–55°C to +125°C
0°C to +70°C
2570 drw 09
6.3 6
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