CY74FCT138TQCT [TI]
1-of-8 Decoder; 1 - 8解码器型号: | CY74FCT138TQCT |
厂家: | TEXAS INSTRUMENTS |
描述: | 1-of-8 Decoder |
文件: | 总7页 (文件大小:110K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
CY54FCT138T . . . D PACKAGE
CY74FCT138T . . . Q OR SO PACKAGE
(TOP VIEW)
Function, Pinout, and Drive Compatible
With FCT and F Logic
Reduced V
Equivalent FCT Functions
(Typically = 3.3 V) Versions of
OH
A
A
A
E
E
E
O
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
0
1
2
1
2
3
7
O
O
O
O
O
O
O
0
1
2
3
4
5
6
Edge-Rate Control Circuitry for
Significantly Improved Noise
Characteristics
I
Supports Partial-Power-Down Mode
off
Operation
Matched Rise and Fall Times
GND
Fully Compatible With TTL Input and
Output Logic Levels
CY54FCT138T . . . L PACKAGE
(TOP VIEW)
Dual 1-of-8 Decoder With Enables
ESD Protection Exceeds JESD 22
– 2000-V Human-Body Model (A114-A)
– 200-V Machine Model (A115-A)
3
2 1 20 19
18
O
O
A
E
4
5
6
7
8
1
2
2
1
– 1000-V Charged-Device Model (C101)
17
16
15
14
CY54FCT138T
– 32-mA Output Sink Current
– 12-mA Output Source Current
NC
NC
O
3
O
4
E
2
E
3
CY74FCT138T
9 10 11 12 13
– 64-mA Output Sink Current
– 32-mA Output Source Current
NC – No internal connection
description
The ’FCT138T devices are 1-of-8 decoders. These devices accept three binary weighted inputs (A , A , A )
0
1
2
and, when enabled, provide eight mutually exclusive active-low outputs (O –O ). The ’FCT138T devices
0
7
feature three enable inputs: two active low (E , E ) and one active high (E ).
1
2
3
All outputs are high unless E and E are low and E is high. This multiple-enable function allows easy parallel
1
2
3
expansion of the device to a 1-of-32 (five lines to 32 lines) decoder with just four ’FCT138T devices and one
inverter.
These devices are fully specified for partial-power-down applications using I . The I circuitry disables the
off
off
outputs, preventing damaging current backflow through the device when it is powered down.
PIN DESCRIPTION
NAME
DESCRIPTION
Address inputs
A
E , E
Enable inputs (active low)
Enable input (active high)
Outputs
1
2
E
3
O
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2001, Texas Instruments Incorporated
On products compliant to MIL-PRF-38535, all parameters are tested
unless otherwise noted. On all other products, production
processing does not necessarily include testing of all parameters.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
ORDERING INFORMATION
SPEED
(ns)
ORDERABLE
TOP-SIDE
MARKING
†
PACKAGE
T
A
PART NUMBER
CY74FCT138CTQCT
CY74FCT138CTSOC
CY74FCT138CTSOCT
CY74FCT138ATQCT
CY74FCT138ATSOC
CY74FCT138ATSOCT
CY74FCT138TQCT
CY54FCT138CTLMB
CY54FCT138TLMB
CY54FCT138TDMB
QSOP – Q
SOIC – SO
QSOP – Q
SOIC – SO
Tape and reel
Tube
5
5
FT138-3
FCT138C
FT138-1
FCT138A
FT138
Tape and reel
Tape and reel
Tube
5
–40°C to 85°C
5.8
5.8
5.8
9
Tape and reel
Tape and reel
Tube
QSOP – Q
LCC – L
6
–55°C to 125°C
LCC – L
Tube
12
12
CDIP – D
Tube
†
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are
available at www.ti.com/sc/package.
FUNCTION TABLE
INPUTS
OUTPUTS
E
1
E
2
E
3
A
A
A
O
O
O
O
O
O
O
O
7
0
1
2
0
1
2
3
4
5
6
H
X
X
X
X
X
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
H
X
L
L
L
L
L
L
L
L
X
L
X
X
L
X
X
L
X
X
L
H
H
L
H
H
H
L
H
H
H
H
L
H
H
H
H
H
L
H
H
H
H
H
H
L
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
L
H
H
H
H
H
H
H
H
H
L
L
L
H
H
H
H
H
H
H
H
H
L
L
H
H
H
H
H
H
H
L
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
H
H
H
H
H
H
H
H = High logic level, L = Low logic level, X = Don’t care
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
logic diagram (positive logic)
15
O
O
O
O
O
0
1
2
3
4
1
A
A
0
1
14
13
12
11
10
9
2
3
A
2
O
O
O
5
6
7
6
4
E
3
E
1
E
2
7
5
Pin numbers shown are for the D, Q, and SO packages.
†
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage range to ground potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
DC input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
DC output voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.5 V to 7 V
DC output current (maximum sink current/pin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120 mA
Package thermal impedance, θ (see Note 1): Q package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90°C/W
JA
SO package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57°C/W
Ambient temperature range with power applied, T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 135°C
A
Storage temperature range, T
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°C
stg
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
recommended operating conditions (see Note 2)
CY54FCT138T
MIN NOM MAX
CY74FCT138T
MIN NOM MAX
UNIT
V
V
V
Supply voltage
4.5
2
5
5.5
4.75
2
5
5.25
V
V
CC
High-level input voltage
Low-level input voltage
High-level output current
Low-level output current
Operating free-air temperature
IH
0.8
–12
32
0.8
–32
64
V
IL
I
I
mA
mA
°C
OH
OL
T
A
–55
125
–40
85
NOTE 2: All unused inputs of the device must be held at V
or GND to ensure proper device operation.
CC
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
CY54FCT138T
CY74FCT138T
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
†
TYP
MIN
MAX
MIN
MAX
V
V
V
= 4.5 V,
= 4.75 V,
= 4.5 V,
I
I
I
I
I
I
I
= –18 mA
= –18 mA
–0.7
–1.2
CC
CC
CC
IN
V
V
IK
–0.7
–1.2
IN
= –12 mA
= –32 mA
= –15 mA
= 32 mA
= 64 mA
2.4
3.3
OH
OH
OH
OL
OL
V
OH
2
V
V
CC
= 4.75 V
2.4
3.3
V
V
= 4.5 V,
0.3
0.2
0.55
CC
V
V
V
V
OL
= 4.75 V,
0.3
0.2
0.55
CC
All inputs
hys
V
V
V
V
V
V
V
V
V
V
V
= 5.5 V,
= 5.25 V,
= 5.5 V,
= 5.25 V,
= 5.5 V,
= 5.25 V,
= 5.5 V,
= 5.25 V,
= 0 V,
V
V
V
V
V
V
V
V
V
V
V
= V
= V
5
±1
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
IN
CC
CC
I
I
I
µA
I
5
±1
±1
IN
= 2.7 V
= 2.7 V
= 0.5 V
= 0.5 V
IN
µA
µA
IH
IL
IN
±1
IN
IN
= 0 V
–60
–120
–225
OUT
OUT
OUT
‡
mA
µA
I
I
I
OS
= 0 V
–60
–120
–225
±1
= 4.5 V
±1
off
= 5.5 V,
= 5.25 V,
≤ 0.2 V,
V
V
≥ V
≥ V
– 0.2 V
– 0.2 V
0.1
0.5
0.2
IN
IN
IN
CC
mA
CC
≤ 0.2 V,
0.1
0.5
0.2
2
IN
CC
§
2
V
CC
V
CC
V
CC
= 5.5 V, V = 3.4 V , f = 0, Outputs open
IN
1
∆I
mA
CC
§
= 5.25 V, V = 3.4 V , f = 0, Outputs open
IN
1
= 5.5 V, Outputs open, One bit switching at 50% duty
– 0.2 V
0.06
0.12
cycle, V ≤ 0.2 V or V ≥ V
IN IN CC
mA/
MHz
¶
I
CCD
V
CC
= 5.25 V, Outputs open, One bit switching at 50%
0.06
0.12
duty cycle, V ≤ 0.2 V or V ≥ V
– 0.2 V
IN IN CC
†
‡
Typical values are at V
CC
= 5 V, T = 25°C.
A
Not more than one output should be shorted at a time. Duration of short should not exceed one second. The use of high-speed test apparatus
and/or sample-and-hold techniques are preferable to minimize internal chip heating and more accurately reflect operational values. Otherwise,
prolonged shorting of a high output can raise the chip temperature well above normal and cause invalid readings in other parametric tests. In
any sequence of parameter tests, I
tests should be performed last.
OS
§
¶
Per TTL-driven input (V = 3.4 V); all other inputs at V
or GND
IN CC
This parameter is derived for use in total power-supply calculations.
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted) (continued)
CY54FCT138T
CY74FCT138T
PARAMETER
TEST CONDITIONS
UNIT
†
TYP
†
TYP
MIN
MAX
MIN
MAX
One output
switching
V
V
≤ 0.2 V or
≥ V – 0.2 V
CC
V
= 5.5 V,
IN
IN
CC
Outputs open,
Switch E , E , or
0.7
1
1.4
at f = 10 MHz
1
1
2
at 50% duty
cycle
E
3
V
IN
= 3.4 V or GND
2.4
#
I
C
mA
One output
switching
V
V
≤ 0.2 V or
V
= 5.25 V,
IN
IN
CC
||
||
0.7
1
1.4
≥ V
CC
– 0.2 V
Outputs open,
Switch E , E , or
at f = 10 MHz
1
1
2
at 50% duty
cycle
E
3
V
IN
= 3.4 V or GND
2.4
C
C
5
9
10
12
5
9
10
12
pF
pF
i
o
†
#
Typical values are at V
CC
= 5 V, T = 25°C.
A
I
= I
+ ∆I
× D × N + I
(f /2 + f × N )
C
CC
CC
H
T
CCD 0 1 1
Where:
I
I
∆I
D
N
= Total supply current
= Power-supply current with CMOS input levels
C
CC
CC
H
T
= Power-supply current for a TTL high input (V = 3.4 V)
IN
= Duty cycle for TTL inputs high
= Number of TTL inputs at D
H
I
f
f
= Dynamic current caused by an input transition pair (HLH or LHL)
= Clock frequency for registered devices, otherwise zero
= Input signal frequency
CCD
0
1
N
= Number of inputs changing at f
1
1
All currents are in milliamperes and all frequencies are in megahertz.
||
Values for these conditions are examples of the I
CC
formula.
switching characteristics over operating free-air temperature range (see Figure 1)
CY54FCT138T CY54FCT138CT
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
ns
MIN
1.5
1.5
1.5
1.5
1.5
1.5
MAX
12
MIN
1.5
1.5
1.5
1.5
1.5
1.5
MAX
6
t
t
t
t
t
t
PLH
PHL
PLH
PHL
PLH
PHL
A
O
O
O
12
6
12.5
12.5
12.5
12.5
6.1
6.1
6.1
6.1
ns
E
1
or E
2
E
3
ns
switching characteristics over operating free-air temperature range (see Figure 1)
CY74FCT138T
CY74FCT138AT
CY74FCT138CT
FROM
(INPUT)
TO
(OUTPUT)
PARAMETER
UNIT
ns
MIN
1.5
1.5
1.5
1.5
1.5
1.5
MAX
MIN
1.5
1.5
1.5
1.5
1.5
1.5
MAX
5.8
5.8
5.9
5.9
5.9
5.9
MIN
1.5
1.5
1.5
1.5
1.5
1.5
MAX
t
t
t
t
t
t
9
9
9
9
9
9
5
5
5
5
5
5
PLH
PHL
PLH
PHL
PLH
PHL
A
O
O
O
ns
E
1
or E
2
E
3
ns
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
CY54FCT138T, CY74FCT138T
1-OF-8 DECODERS
SCCS013B – MAY 1994 – REVISED OCTOBER 2001
PARAMETER MEASUREMENT INFORMATION
7 V
Open
GND
S1
500 Ω
From Output
Under Test
From Output
Under Test
Test
Point
TEST
S1
t
/t
Open
7 V
PLH PHL
t /t
C
= 50 pF
C
= 50 pF
L
L
500 Ω
500 Ω
PLZ PZL
/t
(see Note A)
(see Note A)
t
Open
PHZ PZH
LOAD CIRCUIT FOR
TOTEM-POLE OUTPUTS
LOAD CIRCUIT FOR
3-STATE OUTPUTS
3 V
0 V
1.5 V
Timing Input
Data Input
t
w
t
h
t
3 V
su
3 V
0 V
1.5 V
Input
1.5 V
1.5 V
1.5 V
0 V
VOLTAGE WAVEFORMS
PULSE DURATION
VOLTAGE WAVEFORMS
SETUP AND HOLD TIMES
3 V
0 V
3 V
0 V
Output
Control
1.5 V
1.5 V
1.5 V
1.5 V
Input
t
t
t
t
t
t
PLH
PHL
PLH
PZL
PZH
PLZ
≈3.5 V
V
Output
Waveform 1
(see Note B)
OH
In-Phase
Output
1.5 V
1.5 V
1.5 V
1.5 V
V
V
+ 0.3 V
OL
V
OL
V
OL
t
t
PHL
PHZ
V
V
V
OH
OH
Output
Waveform 2
(see Note B)
Out-of-Phase
Output
– 0.3 V
OH
1.5 V
1.5 V
≈0 V
OL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
INVERTING AND NONINVERTING OUTPUTS
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
LOW- AND HIGH-LEVEL ENABLING
NOTES: A. includes probe and jig capacitance.
C
L
B. Waveform 1 is for an output with internal conditions such that the output is low except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control.
C. The outputs are measured one at a time with one input transition per measurement.
Figure 1. Load Circuit and Voltage Waveforms
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
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enhancements, improvements, and other changes to its products and services at any time and to discontinue
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accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI
deems necessary to support this warranty. Except where mandated by government requirements, testing of all
parameters of each product is not necessarily performed.
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Post Office Box 655303
Dallas, Texas 75265
Copyright 2001, Texas Instruments Incorporated
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