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DM74LS126AMNSN/a180avai7 V, quad TRI-STATE buffer
DM74LS126AMNSCN/a44avai7 V, quad TRI-STATE buffer
DM74LS126ANNSN/a105avai7 V, quad TRI-STATE buffer


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DM74LS126AM-DM74LS126AN
7 V, quad TRI-STATE buffer
LS126A
National
Semiconductor
54LS126/DM74LS126A Quad TRMrrATE@ Buffers
General Description
This device contains four independent gates each of which
performs a non-inverting buffer function. The outputs have
the TRl-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
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 possibility
that two outputs will attempt to take a common bus to oppo-
site logic levels, the disable time is shorter than the enable
lines without external resistors. When disabled, both the time of the outputs.
Connection Diagram
Dual-ln-Llne Package
Vcc C4 M " C3 A3 "
II: " I12 lit 10 la In
l , l: a Is Is I 1
ct At yt ct M " GND
TL/F/6388-1
Order Number 54LS1260MGB, 54LS126FMOB, DM74LS126AM or DM74LS126AN
See NS Package Number M14A, N14A or W148
Function Table
Inputs Output
X L Hi-Z
H = High Logic Level
L = Low Logic Level
X = Either Low or High Logic Level
Hl-2 = TRI-STATE (Outputs are disabled)
2-1 40
Absolute Maximum Ratings (Note)
If Mllltary/Aerospaco trpettlmtd devlces are required.
please contact the National Semiconductor Sales
Offltxtmltttrmutttrtt for availability and 'tpeelflcatlons.
Supply Voltage 7V
Input Voltage 7V
Note: The "Absolute Maximum Ratings" are those values
beyond which the safety of the device cannot be guaran-
teed. The de vice should not be operated at these limits. The
parametric values defined in the ''E/mttrrtxt/ Charattteristitxt"
table are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table will define
Operating Free Air Temperature Range
DM74LS
Storage Temperature Range
- 55°C to + 125°C
0°C to + 70''C
- 65'C to + 15ty'C
Recommended Operating Conditions
the conditions for actual device operation.
Symbol Parameter 5415126 DM74LS126A Unlts
Mln Nom Max Mln Nom Max
Vcc Supply Voltage 4.5 5 5.5 4.75 5 5.25 V
Ihre High Level Input Voltage 2 2 V
" Low Level Input Voltage 0.7 0.8 V
IOH High Level Output Current - 1 - 2.6 mA
IOL Low Level Output Current 12 24 mA
TA Free Air Operating Temperature - 55 125 0 70 'C
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol Parameter Condltlons Mln (Note I) Max Units
Vl InputClamp Voltage Vcc = Min, I. = -18 mA --1.5 V
VOH High Level Output Vcc = Min, lor, = Max
. 2.4 V
Voltage VIH = Min
VOL Low Level Output Vcc = Min, loc = Max 54LS 0.4
Voltage VI, = Max, VIH = Min DM74 0.35 th5 V
IOL = 12 mA, Vcc = Min 0.25 0.4
II InpuiCurrent © Max Vcc = Max.V. = 10V (54LS) 0 1 m A
lnputVoltaiN V. = 7V (DM74) .
hrs High Level lnputCurrent Vcc = Max, VI = 2.7V 20 p.A
IIL Low Level Input Vcc = Max,1h = 0.4V -
Current 0.4 mA
'OZH Off-State OutputCurrent Vcc = Max, Vo = 2.4V
with High Level Output VIH = Min, " = Max 20 FA
Voltage Applied
IOZL Off-State OutputCurrent VCC = Max, vo = 0.4V
with Low Level Output VIH = Min, " = Max -20 pA
Voltage Applied
log Short Circuit Vcc = Max 54LS -30 -130 mA
Output Current (Note 2) DM74 -20 - 100
'00 Supply Current Vcc = Max (Note 3) DM74 12 22 mA
'CCL Supply Current VI = 0V 54LS 24 mA
ICCH Supply Current VI = 4.5V 54LS 20 mA
Note P. All typicals are at Vcc = 5V, TA 8 25'C.
Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second.
Note 3: Ice is measured with both the output control and data inputs grounded.
VQZIS'I
LS126A
Switching Characteristics at VCC = 5V and TA = 25'C (See Section 1 for Test Waveforms and Output Load)
54LS DM74LS
- th. = 150 pF,
Symbol Parameter CL - 50 pF Rt. = 6670 Units
Mln Max Min Max
lpLH Propagation Delay Time Low
to High Level Output 15 21 ns
tpHL Propagation Delay Time High
to Low Level Output 18 22 ns
1pm Output Enable Time to
High Level Output 30 36 ns
‘PZL Output Enable Time to
Low Level Output 20 42 ns
tsz Output Disable Time from 30 n s
High Level Output (Note 1)
tPLZ Output Disable Time from 30 ns
Low Level Output (Note 1)
Not. I.. Ct --- SpF.
This datasheet has been :
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Datasheets for electronic components.
National Semiconductor was acquired by Texas Instruments.
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This file is the datasheet for the following electronic components:
DM74LS126AN - product/dm74ls126an?HQS=T|-nu|I-nulI-dscataIog-df-pf-null-wwe
DM74LS126AM - product/dm74ls126am?HQS=T|-nu|I-null-dscataIog-df-pf-null-wwe
54LS126FMQB - product/54Is126fmqb?HQS=T|-null-null-dscatalog-df—pf—nuII-wwe
54LS126DMQB - product/54ls126dmqb?HQS=T|-nu|I-nulI-dscatalog-df—pf—nuII-wwe
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