Texas Instruments SN74F126D, SN74F126DR, SN74F126N Datasheet
SN74F126
QUADRUPLE BUS BUFFER GATE
WITH 3-STATE OUTPUTS
SDFS017A – D3212, JANUARY 1989 – REVISED OCT OBER 1993
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Copyright 1993, Texas Instruments Incorporated
2–1
• 3-State Outputs Drive Bus Lines or Buffer
Memory Address Registers
• Package Options Include Plastic
Small-Outline Packages and Standard
Plastic 300-mil DIPs
description
The SN74F126 bus buffer features independent
line drivers with 3-state outputs. Each output is
disabled when the associated output enable (OE)
input is low.
The SN74F126 is characterized for operation from
0°C to 70°C.
FUNCTION TABLE
(each buffer)
INPUTS
OUTPUT
OE A
Y
H H H
H LL
LXZ
logic symbol
†
logic diagram (positive logic)
EN
1
1OE
2
1A
1Y
3
4
2OE
5
2A
10
3OE
9
3A
13
4OE
12
4A
2Y
6
3Y
8
4Y
11
1
4
56
2A 2Y
2OE
1
23
1A 1Y
1OE
10
98
3A 3Y
3OE
13
12 11
4A 4Y
4OE
†
This symbol is in accordance with ANSI/IEEE Std 91-1984 and
IEC Publication 617-12.
D OR N PACKAGE
(TOP VIEW)
1
2
3
4
5
6
7
14
13
12
11
10
9
8
1OE
1A
1Y
2OE
2A
2Y
GND
V
CC
4OE
4A
4Y
3OE
3A
3Y
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.
SN74F126
QUADRUPLE BUS BUFFER GATE
WITH 3-STATE OUTPUTS
SDFS017A – D3212, JANUAR Y 1989 – REVISED OCT OBER 1993
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
2–2
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, V
I
(see Note 1) –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current range –30 mA to 5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the disabled or power-off state –0.5 V to 5.5 V. . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state –0.5 V to V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state 128 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –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.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
recommended operating conditions
MIN NOM MAX UNIT
V
CC
Supply voltage 4.5 5 5.5 V
V
IH
High-level input voltage 2 V
V
IL
Low-level input voltage 0.8 V
I
IK
Input clamp current –18 mA
I
OH
High-level output current –15 mA
I
OL
Low-level output current 64 mA
T
A
Operating free-air temperature 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP‡MAX UNIT
V
IK
VCC = 4.5 V, II = –18 mA –1.2 V
IOH = – 3 mA 2.4 3.3
V
OH
V
CC
= 4.5
V
IOH = – 15 mA 2 3.1
V
VCC = 4.75 V , IOH = – 3 mA 2.7
V
OL
VCC = 4.5 V, IOL = 64 mA 0.4 0.55 V
I
I
VCC = 0, VI = 7 V 0.1 mA
I
IH
VCC = 5.5 V, VI = 2.7 V 20 µA
I
IL
VCC = 5.5 V, VI = 0.5 V –20 µA
I
OZH
VCC = 5.5 V, VO = 2.7 V 50 µA
I
OZL
VCC = 5.5 V, VO = 0.5 V –50 µA
I
OS
§
VCC = 5.5 V, VO = 0 –100 –225 mA
I
CCH
VCC = 5.5 V, Outputs open 20 30 mA
I
CCL
VCC = 5.5 V, Outputs open 32 48 mA
I
CCZ
VCC = 5.5 V, Outputs open 26 39 mA
‡
All typical values are at VCC = 5 V, TA = 25°C.
§
Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
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