How it Works
Datasheet
Loading...
74AC11138D

Datasheet 74AC11138PWR, 74AC11138PWLE, 74AC11138N, 74AC11138DR, 74AC11138D Datasheet (Texas Instruments)

Download
74AC11138
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
SCAS042B – MAY 1988 – REVISED APRIL 1996
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
Designed Specifically for High-Speed Memory Decoders and Data Transmission Systems
Incorporates Three Enable Inputs to Simplify Cascading and/or Data Reception
Center-Pin VCC and GND Configurations Minimize High-Speed Switching Noise
EPIC
(Enhanced-Performance Implanted
CMOS) 1-µm Process
500-mA Typical Latch-Up Immunity at 125°C
Package Options Include Plastic Small-Outline (D) and Thin Shrink Small-Outline (PW) Packages, and Standard Plastic 300-mil DIPs (N)
description
The 74AC11138 circuit is designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, this decoder can be used to minimize the effects of system decoding. When employed with high-speed memories utilizing a fast enable circuit, the delay times of this decoder and the enable time of the memory are usually less than the typical access time of the memory . This means that the effective system delay introduced by the decoder is negligible.
The conditions at the binary-select (A, B, C) inputs and the three enable (G1, G2A, G2B) inputs select one of eight output lines. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications.
The 74AC11138 is characterized for operation from –40°C to 85°C.
FUNCTION TABLE
ENABLE INPUTS
SELECT INPUTS OUTPUTS
G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X H X X X X H H H H H H H H X XHXXXHHHHHHHH L XXXXXHHHHHHHH H LLLLLLHHHHHHH H LLLLHHLHHHHHH H LLLHLHHLHHHHH H LLLHHHHHLHHHH H LLHLLHHHHLHHH H LLHLHHHHHHLHH H LLHHLHHHHHHLH H L L H H H H H H H H H H L
Copyright 1996, Texas Instruments Incorporated
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.
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.
EPIC is a trademark of Texas Instruments Incorporated.
1 2 3 4 5 6 7 8
16 15 14 13 12 11 10
9
Y1 Y2 Y3
GND
Y4 Y5 Y6 Y7
Y0 A B C V
CC
G1 G2A G2B
D, N, OR PW PACKAGE
(TOP VIEW)
74AC11138 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
SCAS042B – MAY 1988 – REVISED APRIL 1996
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
logic symbols (alternatives)
†
BIN/OCT
1
15
A
2
14
B
4
13
C
10 9
11
G1
Y0
16
0
&
EN
Y1
1
1
Y2
2
2
Y3
3
3
Y4
5
4
Y5
6
5
Y6
7
6
Y7
8
7
DMUX
0
15
A
14
B
2
13
C
10 9
11
G1
Y0
16
0
&
Y1
1
1
Y2
2
2
Y3
3
3
Y4
5
4
Y5
6
5
Y6
7
6
Y7
8
7
G
7
0
G2A G2B
G2A G2B
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
logic diagram (positive logic)
G1
G2B
G2A
C
B
A
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
Data Outputs
Select Inputs
Enable
Inputs
15
14
13
10 9 11
16
1
2
3
5
6
7
8
74AC11138
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
SCAS042B – MAY 1988 – REVISED APRIL 1996
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage range, V
CC
–0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI (see Note 1) –0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage range, VO (see Note 1) –0.5 V to VCC + 0.5 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input clamp current, IIK (VI < 0 or VI > VCC) ±20 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output clamp current, IOK (VO < 0 or VO > VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous output current, I
O
(VO = 0 to VCC) ±50 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous current through VCC or GND ±200 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum power dissipation at TA = 55°C (in still air) (see Note 2):D package 1.3 W. . . . . . . . . . . . . . . . . . . .
N package 1.1 W. . . . . . . . . . . . . . . . . . . .
PW package 0.5 W. . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
–65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
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.
NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
2. The maximum package power dissipation is calculated using a junction temperature of 150_C and a board trace length of 750 mils, except for the N package, which has a trace length of zero.
recommended operating conditions
MIN NOM MAX UNIT
V
CC
Supply voltage 3 5 5.5 V
VCC = 3 V 2.1
V
IH
High-level input voltage
VCC = 4.5 V
3.15
V VCC = 5.5 V 3.85 VCC = 3 V 0.9
V
IL
Low-level input voltage
VCC = 4.5 V
1.35
V VCC = 5.5 V 1.65
V
I
Input voltage 0 V
CC
V
V
O
Output voltage 0 V
CC
V VCC = 3 V –4
I
OH
High-level output current
VCC = 4.5 V
–24
mA VCC = 5.5 V –24 VCC = 3 V 12
I
OL
Low-level output current
VCC = 4.5 V
24
mA VCC = 5.5 V 24
∆t/∆v Input transition rise or fall rate 0 10 ns/V T
A
Operating free-air temperature –40 85 °C
74AC11138 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
SCAS042B – MAY 1988 – REVISED APRIL 1996
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
TA = 25°C
PARAMETER
TEST CONDITIONS
V
CC
MIN TYP MAX
MIN
MAX
UNIT
3 V 2.9 2.9
IOH = –50 µA
4.5 V 4.4 4.4
5.5 V 5.4 5.4
V
OH
IOH = –4 mA 3 V 2.58 2.48
V
4.5 V 3.94 3.8
IOH = –24 mA
5.5 V 4.94 4.8
IOH = –75 mA
†
5.5 V 3.85 3 V 0.1 0.1
IOL = 50 µA
4.5 V 0.1 0.1
5.5 V 0.1 0.1
V
OL
IOL = 12 mA 3 V 0.36 0.44
V
4.5 V 0.36 0.44
I
OL
= 24
mA
5.5 V 0.36 0.44
IOL = 75 mA
†
5.5 V 1.65
I
I
VI = VCC or GND 5.5 V ±0.1 ±1 µA
I
CC
VI = VCC or GND, IO = 0 5.5 V 4 40 µA
C
i
VI = VCC or GND 5 V 3.5 pF
†
Not more than one output should be tested at a time, and the duration of the test should not exceed 10 ms.
switching characteristics over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
FROM TO
TA = 25°C
PARAMETER
(INPUT) (OUTPUT)
MIN TYP MAX
MIN
MAX
UNIT
t
PLH
1.5 8.3 10.2 1.5 11.4
t
PHL
A, B, C
Any Y
1.5 8.9 10.9 1.5 12.2
ns
t
PLH
1.5 7.2 9.2 1.5 10.2
t
PHL
G1
Any Y
1.5 7.3 9.4 1.5 10.5
ns
t
PLH
1.5 8.2 10.4 1.5 11.5
t
PHL
G2A, G2B
Any Y
1.5 8.3 10.4 1.5 11.6
ns
switching characteristics over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
FROM TO
TA = 25°C
PARAMETER
(INPUT) (OUTPUT)
MIN TYP MAX
MIN
MAX
UNIT
t
PLH
1.5 5.7 7.3 1.5 8.1
t
PHL
A, B, C
Any Y
1.5 6.2 7.9 1.5 8.8
ns
t
PLH
1.5 5.1 6.9 1.5 7.5
t
PHL
G1
Any Y
1.5 5.2 6.9 1.5 7.7
ns
t
PLH
1.5 5.8 7.6 1.5 8.3
t
PHL
G2A, G2B
Any Y
1.5 5.6 7.5 1.5 8.3
ns
74AC11138
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
SCAS042B – MAY 1988 – REVISED APRIL 1996
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
operating characteristics, VCC = 5 V, TA = 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance per gate CL = 50 pF, f = 1 MHz 51 pF
PARAMETER MEASUREMENT INFORMATION
VOLTAGE WAVEFORMS
LOAD CIRCUIT
Input
(see Note B)
50% V
CC
50% V
CC
t
PHL
t
PLH
V
CC
Output
V
OL
V
OH
0 V
From Output
Under Test
CL = 50 pF
(see Note A)
500 Ω
NOTES: A. CL includes probe and jig capacitance.
B. Input pulses are supplied by generators having the following characteristics: PRR ≤ 1 MHz, ZO = 50 Ω, tr = 3 ns, tf = 3 ns.
C. The outputs are measured one at a time with one input transition per measurement.
50% V
CC
50% V
CC
Figure 1. Load Circuit and Voltage Waveforms
74AC11138 3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
SCAS042B – MAY 1988 – REVISED APRIL 1996
6
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
APPLICATION INFORMATION
BIN/OCT
1
15
A0
2
14
A1
4
13
A3
10 9
11
0
16
0
&
EN
1
1
1
2
2
2
3
3
3
4
5
4
5
6
5
6
7
6
7
8
7
74AC11138
V
CC
BIN/OCT
1
15
2
14
4
13
10 9
11
8
16
0
&
EN
9
1
1
10
2
2
11
3
3
12
5
4
13
6
5
14
7
6
15
8
7
74AC11138
BIN/OCT
1
15
2
14
4
13
10 9
11
16
16
0
&
EN
17
1
1
18
2
2
19
3
3
20
5
4
21
6
5
22
7
6
23
8
7
74AC11138
A2
A4
Figure 2. 24-Bit Decoding Scheme
74AC11138
3-LINE TO 8-LINE DECODER/DEMULTIPLEXER
SCAS042B – MAY 1988 – REVISED APRIL 1996
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443
• HOUSTON, TEXAS 77251–1443
APPLICATION INFORMATION
V
CC
BIN/OCT
1
15
A0
2
14
A1
4
13
A3
10 9
11
0
16
0
&
EN
1
1
1
2
2
2
3
3
3
4
5
4
5
6
5
6
7
6
7
8
7
74AC11138
A2
A4
BIN/OCT
1
15
2
14
4
13
10 9
11
8
16
0
&
EN
9
1
1
10
2
2
11
3
3
12
5
4
13
6
5
14
7
6
15
8
7
74AC11138
BIN/OCT
1
15
2
14
4
13
10 9
11
16
16
0
&
EN
17
1
1
18
2
2
19
3
3
20
5
4
21
6
5
22
7
6
23
8
7
74AC11138
BIN/OCT
1
15
2
14
4
13
10 9
11
24
16
0
&
EN
25
1
1
26
2
2
27
3
3
28
5
4
29
6
5
30
7
6
31
8
7
74AC11138
Figure 3. 32-Bit Decoding Scheme
IMPORTANT NOTICE
T exas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability.
TI warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with TI’s standard warranty. T esting and other quality control techniques are utilized to the extent TI deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed, except those mandated by government requirements.
CERT AIN APPLICATIONS USING SEMICONDUCTOR PRODUCTS MAY INVOLVE POTENTIAL RISKS OF DEATH, PERSONAL INJURY, OR SEVERE PROPERTY OR ENVIRONMENTAL DAMAGE (“CRITICAL APPLICATIONS”). TI SEMICONDUCTOR PRODUCTS ARE NOT DESIGNED, AUTHORIZED, OR WARRANTED TO BE SUITABLE FOR USE IN LIFE-SUPPORT DEVICES OR SYSTEMS OR OTHER CRITICAL APPLICATIONS. INCLUSION OF TI PRODUCTS IN SUCH APPLICA TIONS IS UNDERSTOOD T O BE FULLY AT THE CUSTOMER’S RISK.
In order to minimize risks associated with the customer’s applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards.
TI assumes no liability for applications assistance or customer product design. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right of TI covering or relating to any combination, machine, or process in which such semiconductor products or services might be or are used. TI’s publication of information regarding any third party’s products or services does not constitute TI’s approval, warranty or endorsement thereof.
Copyright 1998, Texas Instruments Incorporated
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use