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Fairchild Semiconductor
Fairchild Semiconductor

74125 Datasheet

Quad 3-STATE Buffer


74125 Datasheet Preview


August 1986
Revised March 2000
DM74LS125A
Quad 3-STATE Buffer
General Description
This device contains four independent gates each of which
performs a non-inverting buffer function. The outputs have
the 3-STATE feature. When enabled, the outputs exhibit
the low impedance characteristics of a standard LS output
with additional drive capability to permit the driving of bus
lines without external resistors. When disabled, both the
output transistors are turned off presenting a high-imped-
ance state to the bus line. Thus the output will act neither
as a significant load nor as a driver. To minimize the possi-
bility that two outputs will attempt to take a common bus to
opposite logic levels, the disable time is shorter than the
enable time of the outputs.
Ordering Code:
Order Number Package Number
Package Description
DM74LS125AM
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
DM74LS125ASJ
M14D
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
DM74LS125AN
N14A
14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Function Table
Y=A
Inputs
AC
LL
HL
XH
H = HIGH Logic Level
L = LOW Logic Level
X = Either LOW or HIGH Logic Level
Hi-Z = 3-STATE (Outputs are disabled)
Output
Y
L
H
Hi-Z
© 2000 Fairchild Semiconductor Corporation DS006387
www.fairchildsemi.com
Page 1

Absolute Maximum Ratings(Note 1)
Supply Voltage
7V
Input Voltage
7V
Operating Free Air Temperature Range 0°C to +70°C
Storage Temperature Range
65°C to +150°C
Note 1: The “Absolute Maximum Ratings” are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The “Recommended Operating Conditions” table will define the conditions
for actual device operation.
Recommended Operating Conditions
Symbol
VCC
VIH
VIL
IOH
IOL
TA
Parameter
Supply Voltage
HIGH Level Input Voltage
LOW Level Input Voltage
HIGH Level Output Current
LOW Level Output Current
Free Air Operating Temperature
Min
4.75
2
0
Nom
5
Max
5.25
0.8
2.6
24
70
Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted)
Symbol
Parameter
Conditions
Min
VI
VOH
VOL
II
IIH
IIL
IOZH
IOZL
IOS
Input Clamp Voltage
HIGH Level
Output Voltage
LOW Level
Output Voltage
Input Current @ Max Input Voltage
HIGH Level Input Current
LOW Level Input Current
Off-State Output Current with
HIGH Level Output Voltage Applied
Off-State Output Current with
LOW Level Output Voltage Applied
Short Circuit Output Current
VCC = Min, II = −18 mA
VCC = Min, IOH = Max
VIL = Max, VIH = Min
VCC = Min, IOL = Max
VIL = Max
IOL = 12 mA, VCC = Min
VCC = Max, VI = 7V
VCC = Max, VI = 2.7V
VCC = Max, VI = 0.4V
VCC = Max, VO = 2.4V
VIH = Min, VIL = Max
VCC = Max, VO = 0.4V
VIH = Min, VIL = Max
VCC = Max (Note 3)
2.4
20
ICC Supply Current
Note 2: All typicals are at VCC = 5V, TA = 25°C.
VCC = Max (Note 4)
Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 4: ICC is measured with the data control (C) inputs at 4.5V and the data inputs grounded.
Typ
(Note 2)
3.4
0.35
0.25
11
Max
1.5
0.5
0.4
0.1
20
0.4
20
20
100
20
Switching Characteristics
at VCC = 5V and TA = 25°C
Symbol
Parameter
tPLH Propagation Delay Time LOW-to-HIGH Level Output
tPHL Propagation Delay Time HIGH-to-LOW Level Output
tPZH Output Enable Time to HIGH Level Output
tPZL Output Enable Time to LOW Level Output
tPHZ Output Disable Time from HIGH Level Output (Note 5)
tPLZ Output Disable Time from LOW Level Output (Note 5)
Note 5: CL = 5pF.
RL = 667
CL = 50 pF
CL = 150 pF
Min Max Min Max
15 21
18 22
25 35
25 40
20
20
Units
V
V
V
mA
mA
°C
Units
V
V
V
mA
µA
mA
µA
µA
mA
mA
Units
ns
ns
ns
ns
ns
ns
www.fairchildsemi.com
2
Page 2

Physical Dimensions inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Package Number M14A
3 www.fairchildsemi.com
Page 3

Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M14D
www.fairchildsemi.com
4
Page 4
Part Number 74125
Manufactur Fairchild Semiconductor
Description Quad 3-STATE Buffer
Total Page 5 Pages
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