IDT IDT74FCT138EB Fast cmos 1-of-8 decoder with enable Datasheet


IDT54/74FCT138
IDT54/74FCT138A
IDT54/74FCT138C
FAST CMOS
1-OF-8 DECODER
WITH ENABLE
Integrated Device Technology, Inc.
FEATURES:
DESCRIPTION:
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•
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The IDT54/74FCT138/A/C are 1-of-8 decoders built using
an advanced dual metal CMOS technology. The IDT54/
74FCT138/A/C accept three binary weighted inputs (A0, A1,
A2) and, when enabled, provide eight mutually exclusive
active LOW outputs (O0 - O7). The IDT54/74FCT138/A/C
feature three enable inputs, two active LOW (E1, E2) and one
active HIGH (E3). All outputs will be HIGH unless E1 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 IDT54/74FCT138/A/C devices
and one inverter.
•
•
•
•
•
•
•
•
•
IDT54/74FCT138 equivalent to FAST speed
IDT54/74FCT138A 35% faster than FAST
IDT54/74FCT138C 40% faster than FAST
Equivalent to FAST speeds output drive over full temperature and voltage supply extremes
IOL = 48mA (commercial) and 32mA (military)
CMOS power levels (1mW typ. static)
TTL input and output level compatible
CMOS output level compatible
Substantially lower input current levels than FAST
(5µA max.)
JEDEC standard pinout for DIP and LCC
Product available in Radiation Tolerant and Radiation
Enhanced versions
Military product compliant to MIL-STD-883, Class B
Standard Military Drawing # 5962-87654 is listed on this
function. Refer to section 2.
FUNCTIONAL BLOCK DIAGRAM
A2
A1
A0
PIN CONFIGURATIONS
E 1 E 2 E3
A0
A1
A2
E1
E2
E3
O7
GND
1
16
2
15
P16-1,
D16-1,
SO16-1
&
E16-1
3
4
5
6
14
13
12
11
7
10
8
9
Vcc
O0
O1
O2
O3
O4
O5
O6
A1
A0
NC
Vcc
O0
DIP/SOIC/CERPACK
TOP VIEW
INDEX
3
O7
O6
O5
O4
O3
O2
O1
A2
E1
NC
E2
E3
O0
2
1
20 19
18
5
6
17
L20-2
16
7
15
8
14
9 10 11 12 13
O7
GND
NC
O6
O5
2581 drw 02
4
O1
O2
NC
O3
O4
2581 drw 01
LCC
TOP VIEW
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
FAST is a trademark of National Semiconductor Co.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1992 Integrated Device Technology, Inc.
7.3
MAY 1992
DSC-4625/3
1
IDT54/74FCT138/A/C
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
PIN DESCRIPTION
Pin Names
Description
A0–A2
Address Inputs
E1, E2
Enable Inputs (Active LOW)
E3
Enable Input (Active HIGH)
O0–O7
Outputs (Active LOW)
2581 tbl 05
FUNCTION TABLE
Inputs
E1
E2
H
X
X
L
L
L
L
L
L
L
L
X
H
X
L
L
L
L
L
L
L
L
E3
X
X
L
H
H
H
H
H
H
H
H
Outputs
A0
X
X
X
L
H
L
H
L
H
L
H
A1
X
X
X
L
L
H
H
L
L
H
H
A2
X
X
X
L
L
L
L
H
H
H
H
O0
O1
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
O2
H
H
H
H
H
L
H
H
H
H
H
O3
O4
O5
O6
O7
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
2581 tbl 06
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
VTERM(2) Terminal Voltage
with Respect
to GND
VTERM(3) Terminal Voltage
with Respect
to GND
TA
Operating
Temperature
TBIAS
Temperature
Under Bias
TSTG
Storage
Temperature
PT
Power Dissipation
DC Output Current
IOUT
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Commercial
Military
Unit
–0.5 to +7.0 –0.5 to +7.0
V
–0.5 to VCC
–0.5 to VCC
V
0 to +70
–55 to +125
°C
–55 to +125
–65 to +135
°C
–55 to +125
–65 to +150
°C
0.5
120
0.5
120
W
mA
Symbol
Parameter(1)
Conditions
CIN
Input Capacitance
COUT
Output Capacitance VOUT = 0V
VIN = 0V
Typ. Max. Unit
6
10
pF
8
12
pF
NOTE:
2581 tbl
1. This parameter is guaranteed characterization data and not tested.
NOTES:
2581 tbl 01
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.
7.3
2
02
IDT54/74FCT138/A/C
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: VLC = 0.2V; VHC = VCC – 0.2V
Commercial: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
Test Conditions(1)
Min.
Typ.(2)
Max.
Unit
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
VCC = Max.
VI = VCC
VI= 2.7V
VI= 0.5V
VI = GND
VCC = Min., IN = –18mA
VCC = Max.(3), VO = GND
VCC = 3V, VIN = VLC or VHC, IOH = –32µA
IOH = –300µA
VCC = Min.
IOH = –12mA MIL.
VIN = VIH or VIL
IOH = –15mA COM’L.
VCC = 3V, VIN = VLC or VHC, IOL = 300µA
IOL = 300µA
VCC = Min.
VIN = VIH or VIL
IOL = 32mA MIL.
IOL = 48mA COM’L.
2.0
—
—
—
—
—
—
–60
VHC
VHC
2.4
2.4
—
—
—
—
—
—
—
—
—
—
–0.7
–120
VCC
VCC
4.3
4.3
GND
GND
0.3
0.3
—
0.8
5
5(4)
–5(4)
–5
–1.2
—
—
—
—
—
VLC
VLC(4)
0.5
0.5
V
V
µA
Parameter
VIH
VIL
IIH
Input HIGH Level
Input LOW Level
Input HIGH Current
IIL
Input LOW Current
VIK
IOS
VOH
Clamp Diode Voltage
Short Circuit Current
Output HIGH Voltage
VOL
Output LOW Voltage
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 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. This parameter is guaranteed but not tested.
V
mA
V
V
2581 tbl 03
POWER SUPPLY CHARACTERISTICS
VLC = 0.2V; VHC = VCC – 0.2V
Symbol
Parameter
Test Conditions(1)
Vcc = Max.
VIN ≥ VHC; VIN ≤ VLC
Vcc = Max.
VIN = 3.4V(3)
Min.
Typ.(2)
Max.
Unit
—
0.2
1.5
mA
—
0.5
2.0
mA
ICC
Quiescent Power Supply Current
∆ICC
Quiescent Power Supply Current
TTL Inputs HIGH
ICCD
Dynamic Power Supply Current(4)
Vcc = Max.
Outputs Open
One Output Toggling
50% Duty Cycle
VIN ≥ VHC
VIN ≤ VLC
—
0.15
0.3
mA/MHz
IC
Total Power Supply Current(5)
Vcc = Max.
Outputs Open
Toggle E1, E2 or E3
50% Duty Cycle
fO = 10MHz
One Output Toggling
VIN ≥ VHC
VIN ≤ VLC
(FCT)
VIN = 3.4V
VIN = GND
—
1.7
4.5
mA
—
2.0
5.5
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 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. IC = IQUIESCENT + IINPUTS + IDYNAMIC
IC = ICC + ∆ICC DHNT + ICCD (fCP/2 + 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)
fCP = Clock Frequency for Register Devices (Zero for Non-Register Devices)
fO = Output Frequency
NO = Number of Outputs at fO
All currents are in milliamps and all frequencies are in megahertz.
7.3
2581 tbl 04
3
IDT54/74FCT138/A/C
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
IDT54/74FCT138
Com’l.
Symbol
Parameter
tPLH
tPHL
Propagation Delay
An to On
tPLH
tPHL
tPLH
tPHL
Mil.
IDT54/74FCT138A
Com’l.
Mil.
IDT54/74FCT138C
Com’l.
Mil.
Condition(1) Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Unit
CL = 50pF
RL = 500Ω
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
Propagation Delay
E1 or E2 to On
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
Propagation Delay
E3 to On
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:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
2581 tbl 07
7.3
4
IDT54/74FCT138/A/C
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
VCC
7.0V
500Ω
V OUT
VIN
Pulse
Generator
D.U.T.
50pF
RT
500Ω
SET-UP, HOLD AND RELEASE TIMES
Closed
All Other Test
Open
3V
1.5V
0V
tH
TIMING
INPUT
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
tW
t REM
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
Open Drain
Disable Low
Enable Low
PULSE WIDTH
DATA
INPUT
ASYNCHRONOUS CONTROL
Switch
DEFINITIONS:
2581 tbl 08
CL = Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
CL
t SU
Test
t SU
1.5V
3V
1.5V
0V
tH
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
3V
1.5V
SAME PHASE
INPUT TRANSITION
t PLH
t PHL
CONTROL
INPUT
OUTPUT
NORMALLY SWITCH
LOW CLOSED
t PZH
VOL
t PLH
t PHL
OUTPUT SWITCH
NORMALLY OPEN
HIGH
3V
OPPOSITE PHASE
INPUT TRANSITION
1.5V
0V
t PLZ
t PZL
0V
VOH
1.5V
OUTPUT
1.5V
3.5V
1.5V
3.5V
0.3V
V OL
t PHZ
0.3V
1.5V
0V
V OH
0V
0V
NOTES
2581 drw 04
1. Diagram shown for input Control Enable-LOW and input Control
Disable-HIGH.
2. Pulse Generator for All Pulses: Rate ≤ 1.0 MHz; ZO ≤ 50Ω; tF ≤ 2.5ns;
tR ≤ 2.5ns.
7.3
5
IDT54/74FCT138/A/C
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
ORDERING INFORMATION
IDT
XX
Temperature
Range
FCT
X
X
X
Device
Type
Package
Process
7.3
Blank
B
Commercial
MIL-STD-883, Class B
P
D
SO
E
L
Plastic DIP
CERDIP
Small Outline IC
CERPACK
Leadless Chip Carrier
138
138A
138C
1-of-8 Decoder
Fast 1-of-8 Decoder
Super Fast 1-of-8 Decoder
54
74
–55°C to +125°C
0°C to +70°C
2581 drw 03
6
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