IDT IDT74FCT138CTQ Fast cmos 1-of-8 decoder with enable Datasheet

FAST CMOS
1-OF-8 DECODER
WITH ENABLE
Integrated Device Technology, Inc.
IDT54/74FCT138T/AT/CT
FEATURES:
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 (O0-O7). The IDT54/74FCT138T/AT/CT
features 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 IDT54/74FCT138T/AT/CT
devices and one inverter.
•
•
•
•
•
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
PIN CONFIGURATIONS
FUNCTIONAL BLOCK DIAGRAM
A2 A1
A0
E1
E2
E3
1
16
VCC
A1
A2
2
3
15
O0
14
O1
E1
4
13
E2
E3
5
O2
O3
O7
GND
7
10
O4
O5
8
9
O6
A0
6
P16-1
D16-1
SO16-1
SO16-7
&
E16-1
12
11
2570 drw 02
3 2
O7
O6
O5
O4
O3
O2
O1
O0
2570 drw 01
A2
4
E1
5
NC
6
E2
7
E3
8
1
20 19
18
O0
V CC
A1
A0
INDEX
NC
DIP/SOIC/QSOP/CERPACK
TOP VIEW
17
L20-2
O1
16
O2
NC
15
O3
14
O4
O5
O6
GND
NC
O7
9 10 11 12 13
2570 drw 03
LCC
TOP VIEW
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
MILITARY AND COMMERCIAL TEMPERATURE RANGES
1995 Integrated Device Technology, Inc.
6.3
APRIL 1995
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
A0–A2
Description
Address Inputs
E1, E2
Enable Inputs (Active LOW)
E3
Enable Input (Active HIGH)
O0–O7
Outputs (Active LOW)
2570 tbl 01
FUNCTION TABLE
Outputs
Inputs
E1
E2
E3
A0
A1
A2
O0
O1
O2
O3
O4
O5
O6
O7
H
X
X
L
L
L
L
L
L
L
L
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
X
X
X
L
L
L
L
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
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
2570 tbl 02
ABSOLUTE MAXIMUM RATINGS(1)
Symbol
Rating
Commercial
VTERM(2) Terminal Voltage
–0.5 to +7.0
with Respect to
GND
(3)
VTERM
Terminal Voltage
–0.5 to
with Respect to
VCC +0.5
GND
TA
Operating
0 to +70
Temperature
TBIAS
Temperature
–55 to +125
Under Bias
TSTG
Storage
–55 to +125
Temperature
PT
Power Dissipation
0.5
I OUT
DC Output
Current
–60 to +120
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Military
–0.5 to +7.0
Unit
V
–0.5 to
VCC +0.5
V
–55 to +125
°C
–65 to +135
°C
–65 to +150
°C
0.5
W
–60 to +120
mA
Symbol
Parameter(1)
CIN
Input
Capacitance
COUT
Output
Capacitance
Conditions
VIN = 0V
Typ.
6
VOUT = 0V
8
Max. Unit
10
pF
12
NOTE:
1. This parameter is measured at characterization but not tested.
pF
2570 lnk 04
2570 lnk 03
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. Input and VCC terminals only.
3. Outputs and I/O terminals only.
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: TA = 0°C to +70°C, VCC = 5.0V ± 5%; Military: TA = –55°C to +125°C, VCC = 5.0V ± 10%
Symbol
VIH
VIL
Parameter
Input HIGH Level
Test Conditions(1)
Guaranteed Logic HIGH Level
Input LOW Level
Min.
2.0
Typ.(2)
—
Max.
—
Unit
V
Guaranteed Logic LOW Level
—
—
0.8
V
II H
Input HIGH
Current (4)
VCC = Max.
VI = 2.7V
—
—
±1
µA
II L
Input LOW Current (4)
VCC = Max.
VI = 0.5V
—
—
±1
µA
VCC = Max., VI = VCC (Max.)
—
—
±1
µA
VCC = Min., IN = –18mA
—
–0.7
–1.2
V
–60
–120
–225
mA
2.4
3.3
—
V
2.0
3.0
—
V
—
0.3
0.5
V
—
200
—
mV
—
0.01
1
mA
Current (4)
II
Input HIGH
VIK
Clamp Diode Voltage
Max.(3) ,
IOS
Short Circuit Current
VCC =
VOH
Output HIGH Voltage
VCC = Min.
VIN = VIH or VIL
VOL
Output LOW Voltage
VH
Input Hysteresis
ICC
Quiescent Power Supply Current
VO = GND
IOH = –6mA MIL.
IOH = –8mA COM'L.
IOH = –12mA MIL.
IOH = –15mA COM'L.
IOL = 32mA MIL.
IOL = 48mA COM'L.
VCC = Min.
VIN = VIH or VIL
—
VCC = Max.
VIN = 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 VCC = 5.0V, +25°C ambient.
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.
6.3
2570 tbl 05
3
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
∆ICC
ICCD
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Dynamic Power Supply Current (4)
IC
Total Power Supply Current (6)
Test Conditions(1)
VCC = Max.
VIN = 3.4V(3)
VCC = Max.
Outputs Open
One Bit Toggling
50% Duty Cycle
VCC = Max.
Outputs Open
Toggle E1, E2 or E3
50% Duty Cycle
fo = 10MHz
One Input and
One Output Toggling
Min.
—
Typ.(2)
0.5
Max.
2.0
Unit
mA
VIN = VCC
VIN = GND
—
0.15
0.3
mA/
MHz
VIN = VCC
VIN = GND
—
1.5
4.0
mA
VIN = 3.4V
VIN = GND
—
1.8
5.0
2570 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.
SWITCHING CHARACTERISTICS OVER OPERATING RANGE
FCT138T
Com'l.
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Parameter
Propagation Delay
An to On
Propagation Delay
E1 or E2 to On
Propagation Delay
E3 to On
Condition(1)
CL = 50pF
RL = 500Ω
(2)
Min.
FCT138AT
Mil.
(2)
Max. Min.
Com'l.
Mil.
(2)
Com'l.
(2)
Mil.
(2)
Max. Min.
Max. Min.
Max. Min.
Max.
Unit
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:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
Max. Min.
(2)
FCT138CT
2570 tbl 07
6.3
4
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
TEST CIRCUITS AND WAVEFORMS
SWITCH POSITION
TEST CIRCUITS FOR ALL OUTPUTS
V CC
7.0V
Closed
Open
2570 tbl 08
DEFINITIONS:
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
D.U.T.
50pF
RT
Open Drain
Disable Low
All Other Tests
V OUT
Pulse
Generator
Switch
Enable Low
500Ω
VIN
Test
500Ω
CL
2570 drw 04
SET-UP, HOLD AND RELEASE TIMES
DATA
INPUT
tH
tSU
TIMING
INPUT
ASYNCHRONOUS CONTROL
PRESET
CLEAR
ETC.
SYNCHRONOUS CONTROL
PRESET
CLEAR
CLOCK ENABLE
ETC.
tREM
tSU
PULSE WIDTH
3V
1.5V
0V
3V
1.5V
0V
3V
1.5V
0V
LOW-HIGH-LOW
PULSE
1.5V
tW
HIGH-LOW-HIGH
PULSE
1.5V
2570 drw 06
3V
1.5V
0V
tH
2570 drw 05
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
SAME PHASE
INPUT TRANSITION
tPLH
tPHL
OUTPUT
tPLH
OPPOSITE PHASE
INPUT TRANSITION
tPHL
3V
1.5V
0V
VOH
1.5V
VOL
DISABLE
3V
CONTROL
INPUT
tPZL
OUTPUT
NORMALLY
LOW
3V
1.5V
0V
SWITCH
CLOSED
tPLZ
3.5V
1.5V
tPZH
OUTPUT
NORMALLY
HIGH
2570 drw 07
SWITCH
OPEN
1.5V
0V
3.5V
0.3V
VOL
tPHZ
0.3V
1.5V
0V
VOH
0V
2570 drw 08
NOTES:
1. Diagram shown for input Control Enable-LOW and input Control DisableHIGH
2. Pulse Generator for All Pulses: Rate ≤ 1.0MHz; tF ≤ 2.5ns; tR ≤ 2.5ns
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 Type
X
Package
X
Process
Blank
B
Commercial
MIL-STD-883, Class B
P
D
SO
E
L
Q
Plastic DIP
CERDIP
Small Outline IC
CERPACK
Leadless Chip Carrier
Quarter-size Small Outline Package
138T
138AT
138CT
1-of-8 Decoder
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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