IDT54FCT138TLB [IDT]
FAST CMOS 1-OF-8 DECODER WITH ENABLE; FAST CMOS 1 - OF- 8解码器启用
| 型号： | IDT54FCT138TLB |
| 厂家： | 
INTEGRATED DEVICE TECHNOLOGY |
| 描述： | FAST CMOS 1-OF-8 DECODER WITH ENABLE |
| 文件： | 总6页 (文件大小：110K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
FAST CMOS
IDT54/74FCT138T/AT/CT
1-OF-8 DECODER
WITH ENABLE
Integrated Device Technology, Inc.
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.)
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
activeHIGH(E3).AlloutputswillbeHIGHunlessE1 andE2 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.
– 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
FUNCTIONAL BLOCK DIAGRAM
PIN CONFIGURATIONS
A2 A1
A0
E1 E2 E3
A
0
1
16
15
14
13
12
11
10
9
VCC
A
1
2
2
3
4
O0
P16-1
D16-1
SO16-1
SO16-7
&
A
O1
O2
O3
E
E
E
1
2
3
5
6
7
8
O4
O5
O6
E16-1
O
7
GND
2570 drw 02
DIP/SOIC/QSOP/CERPACK
TOP VIEW
INDEX
3
2
20 19
1
A2
E1
O1
4
5
6
7
8
18
O7
O6
O5
O4
O3
O2
O1
O0
17
16
15
14
O2
NC
NC
2570 drw 01
L20-2
E2
E3
O3
O4
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
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
–A
Description
A0
2
Address Inputs
E
1,
E
2
Enable Inputs (Active LOW)
Enable Input (Active HIGH)
Outputs (Active LOW)
E3
O0–O7
2570 tbl 01
FUNCTION TABLE
Outputs
Inputs
1
E
2
E
E3
A0
A1
A2
0
O
1
O
2
O
3
O
4
O
5
O
6
O
7
O
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
X
X
X
L
H
L
H
L
H
L
X
X
X
L
X
X
X
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
L
L
H
H
L
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
2570 tbl 02
ABSOLUTE MAXIMUM RATINGS(1)
CAPACITANCE (TA = +25°C, f = 1.0MHz)
Symbol
Parameter(1)
Conditions Typ. Max. Unit
Symbol
Rating
Commercial
Military
Unit
(2)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to +7.0 –0.5 to +7.0
V
C
IN
Input
Capacitance
Output
V
IN = 0V
6
8
10
pF
COUT
VOUT = 0V
12
pF
(3)
VTERM
Terminal Voltage
with Respect to
GND
–0.5 to
–0.5 to
V
Capacitance
VCC +0.5
VCC +0.5
2570 lnk 04
NOTE:
1. This parameter is measured at characterization but not tested.
TA
Operating
0 to +70
–55 to +125 °C
Temperature
Temperature
Under Bias
Storage
TBIAS
TSTG
–55 to +125 –65 to +135 °C
–55 to +125 –65 to +150 °C
Temperature
Power Dissipation
PT
0.5
0.5
W
IOUT
DC Output
Current
–60 to +120 –60 to +120 mA
2570 lnk 03
NOTES:
1. Stresses greater than those listed under ABSOLUTE MAXIMUM RAT-
INGS may cause permanent damage to the device. This is a stress rating
onlyandfunctionaloperationofthedeviceattheseoranyotherconditions
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
Parameter
Input HIGH Level
Test Conditions(1)
Min. Typ.(2) Max.
Unit
VIH
Guaranteed Logic HIGH Level
2.0
—
—
—
—
0.8
±1
V
VIL
II H
II L
Input LOW Level
Guaranteed Logic LOW Level
V
µA
µA
µA
V
Input HIGH Current(4)
Input LOW Current(4)
Input HIGH Current(4)
Clamp Diode Voltage
Short Circuit Current
Output HIGH Voltage
VCC = Max.
VCC = Max.
VI = 2.7V
VI = 0.5V
—
—
—
—
±1
II
VCC = Max., VI = VCC (Max.)
VCC = Min., IN = –18mA
VCC = Max.(3), VO = GND
—
—
±1
VIK
IOS
VOH
—
–0.7
–1.2
–60
2.4
–120 –225
mA
V
VCC = Min.
IOH = –6mA MIL.
3.3
3.0
0.3
—
VIN = VIH or VIL
IOH = –8mA COM'L.
IOH = –12mA MIL.
IOH = –15mA COM'L.
IOL = 32mA MIL.
2.0
—
—
V
V
VOL
Output LOW Voltage
VCC = Min.
0.5
VIN = VIH or VIL
IOL = 48mA COM'L.
VH
Input Hysteresis
—
—
—
200
—
1
mV
mA
ICC
Quiescent Power Supply Current
VCC = Max.
0.01
VIN = GND or VCC
2570 tbl 05
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
3
IDT54/74FCT138T/AT/CT
FAST CMOS 1-OF-8 DECODER-WITH ENABLE
MILITARY AND COMMERCIAL TEMPERATURE RANGES
POWER SUPPLY CHARACTERISTICS
Symbol
Parameter
Quiescent Power Supply Current
TTL Inputs HIGH
Test Conditions(1)
Min. Typ.(2) Max.
Unit
∆ICC
VCC = Max.
VIN = 3.4V(3)
—
0.5
2.0
mA
ICCD
IC
Dynamic Power Supply Current(4) VCC = Max.
VIN = VCC
VIN = GND
—
0.15
0.3
mA/
MHz
Outputs Open
One Bit Toggling
50% Duty Cycle
VCC = Max.
Total Power Supply Current(6)
VIN = VCC
VIN = GND
—
—
1.5
1.8
4.0
5.0
mA
Outputs Open
Toggle E1, E2 or E3
50% Duty Cycle
fo = 10MHz
VIN = 3.4V
VIN = GND
One Input and
One Output Toggling
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
FCT138AT
FCT138CT
Com'l. Mil.
Com'l.
Mil.
Com'l. Mil.
Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max. Min.(2) Max.
Symbol
Parameter
Condition(1)
= 50pF
= 500
Unit
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
Propagation Delay
C
L
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
A
n
to O
Propagation Delay
or E to O
Propagation Delay
to O
n
R
L
Ω
1.5 9.0 1.5 12.5 1.5 5.9 1.5 8.0 1.5 5.2 1.5 6.1
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
E1
2
n
ns
E3
n
NOTES:
1. See test circuit and waveforms.
2. Minimum limits are guaranteed but not tested on Propagation Delays.
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
TEST CIRCUITS FOR ALL OUTPUTS
SWITCH POSITION
Test
Switch
Open Drain
Disable Low
VCC
7.0V
Closed
Enable Low
500
500
Ω
Ω
Open
All Other Tests
VOUT
VIN
2570 tbl 08
DEFINITIONS:
Pulse
Generator
D.U.T.
CL= Load capacitance: includes jig and probe capacitance.
RT = Termination resistance: should be equal to ZOUT of the Pulse
Generator.
50pF
T
R
C
L
2570 drw 04
SET-UP, HOLD AND RELEASE TIMES
PULSE WIDTH
3V
DATA
1.5V
0V
INPUT
LOW-HIGH-LOW
t
H
t
t
SU
1.5V
PULSE
3V
1.5V
0V
TIMING
INPUT
ASYNCHRONOUS CONTROL
tW
t
REM
PRESET
CLEAR
ETC.
3V
1.5V
0V
HIGH-LOW-HIGH
PULSE
1.5V
SYNCHRONOUS CONTROL
PRESET
2570 drw 06
3V
1.5V
0V
CLEAR
CLOCK ENABLE
ETC.
SU
t
H
2570 drw 05
PROPAGATION DELAY
ENABLE AND DISABLE TIMES
ENABLE
DISABLE
3V
1.5V
0V
3V
SAME PHASE
CONTROL
INPUT
1.5V
0V
INPUT TRANSITION
t
PLH
t
t
PHL
PHL
t
PZL
tPLZ
V
OH
OUTPUT
3.5V
1.5V
3.5V
1.5V
OUTPUT
NORMALLY
LOW
SWITCH
CLOSED
V
OL
t
PLH
0.3V
0.3V
V
OL
3V
1.5V
0V
t
PZH
tPHZ
OPPOSITE PHASE
INPUT TRANSITION
V
OH
OUTPUT
NORMALLY
HIGH
SWITCH
OPEN
1.5V
0V
2570 drw 07
0V
2570 drw 08
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
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
X
XXXX
X
X
Temp. Range
Family
Device Type
Package
Process
Blank
B
Commercial
MIL-STD-883, Class B
P
Plastic DIP
D
CERDIP
SO
E
Small Outline IC
CERPACK
L
Q
Leadless Chip Carrier
Quarter-size Small Outline Package
138T
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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