Diodes 74LVC125A User Manual
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Description
The 74LVC125A provides four independent buffers with three state
outputs. Each output is independently controlled by an associated
output enable pin (OE) which places the device in the high
impedance state when driven high. The device is designed for
operation with a power supply range of 1.65V to 5.5V. The inputs are
tolerant to 5.5V allowing this device to be used in a mixed voltage
environment. The device is fully specified for partial power down
applications using IOFF. The IOFF circuitry disables the output
preventing damaging current backflow when the device is powered
down.
Features
74LVC125
QUADRUPLE 3-STATE BUFFERS
Pin Assignments
• Supply Voltage Range from 1.65V to 5.5V
• Sinks 24mA at Vcc = 3.3V
• CMOS low power consumption
• IOFF Supports Partial-Power-Down Mode Operation
• Inputs or outputs accept up to 5.5V
• Inputs can be driven by 3.3V or 5.5V allowing for voltage
translation applications.
• ESD Protection Exceeds JESD 22
200-V Machine Model (A115-A)
2000-V Human Body Model (A114-A)
Exceeds 1000-V Charged Device Model (C101C)
• Latch-Up Exceeds 250mA per JESD 78, Class II
• Range of Package Options SO-14 and TSSOP-14
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
74LVC125A
Document number: DS35265 Rev. 3 - 2
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
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Applications
• Voltage Level Shifting
• General Purpose Logic
• Power Down Signal Isolation
• Wide array of products such as:
PCs, networking, notebooks, ultrabooks, netbooks
Computer peripherals, hard drives, CD/DVD ROM
TV, DVD, DVR, set top box
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July 2012
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Pin Descriptions
Pin Number Pin Name Description
1 1OE Data Enable Input (active low)
2 1A Data Input
3 1Y Data Output
4 2OE Data Enable Input (active low)
5 2A Data Input
6 2Y Data Output
7 GND Ground
8 3Y Data Output
9 3A Data Input
10 3OE Data Enable Input (active low)
11 4Y Data Outp
12 4A Data Input
13 4OE Data Enable Input (active low)
V
14
CC
Supply Voltage
Logic Diagram
74LVC125
Function Table
Inputs Output
OE
L H H
L L L
H X Z
A Y
74LVC125A
Document number: DS35265 Rev. 3 - 2
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74LVC125
Absolute Maximum Ratings (Note 4) (@T
Symbol Description Rating Unit
ESD HBM Human Body Model ESD Protection 2 KV
ESD CDM Charged Device Model ESD Protection 1 KV
ESD MM Machine Model ESD Protection 200 V
VCC
VI
VO Voltage applied to output in high impedance or I
VO
IIK Input Clamp Current VI <0
IOK
IO
ICC,, I
GND
TJ
T
STG
P
TOT
Note: 4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should
be within recommend values.
Supply Voltage Range -0.5 to 6.5 V
Input Voltage Range -0.5 to 6.5 V
Voltage applied to output in high or low state
Output Clamp Current V
Continuous output current ±50 mA
Continuous current through VCC or GND
Operating Junction Temperature -40 to +150 °C
Storage Temperature -65 to +150 °C
Total Power Dissipation 500 mW
<0
O
Recommended Operating Conditions (Note 5) (@T
Symbol Parameter Conditions Min Max Unit
VCC
VI
VO
Δt/ΔV Input transition rise or fall rate
TA
Note: 5. Unused inputs should be held at VCC or Ground.
Supply Voltage 1.65 5.50 V
Input Voltage 0 5.5 V
Output Voltage
Operating free-air temperature -40 +125 °C
Active Mode 0
Vcc = 0V; Power Down Mode 0 5.5 V
V
= 1.65V to 2.7V
CC
VCC = 2.7V to 3.6V
= +25°C, unless otherwise specified.)
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state
OFF
= +25°C, unless otherwise specified.)
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-0.5 to 6.5 V
-0.3 to VCC +0.5
-50 mA
-50 mA
±100 mA
V
CC
20
10
V
V
ns/V
74LVC125A
Document number: DS35265 Rev. 3 - 2
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July 2012
© Diodes Incorporated
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