Document
74AHCT126
QUADRUPLE 3-STATE BUFFERS OE HIGH
Description
The 74AHCT126 provides four independent buffer gates with 3-state outputs. Each buffer has a separate enable pin that if driven with a low logic level, places the corresponding output in the high impedance state. The device is designed for operation with a power supply range of 4.5V to 5.5V.
Pin Assignments
Features
• Wide Supply Voltage Range from 4.5V to 5.5V • Inputs Are TTL Voltage Level Compatible • Outputs Sink or Source 8mA at VCC = 4.5V • CMOS Low Power Consumption • Schmitt Trigger Action at All Inputs • ESD Protection Exceeds JESD 22
200-V Machine Model (A115) 2000-V Human Body Model (A114) Exceeds 1000-V Charged Device Model (C101) • 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)
Applications
• General Purpose Logic • Wide Array of Products Such as:
PCs, Networking, Notebooks, Netbooks Computer Peripherals, Hard Drives, CD/DVD ROMs TVs, DVDs, DVRs, Set Top Boxes
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. 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.
74AHCT126
Document number: DS35356 Rev. 3 - 2
1 of 9 www.diodes.com
April 2015
© Diodes Incorporated
Ordering Information
74AHCT126
Part Number
74AHCT126S14-13 74AHCT126T14-13
Package Code
S14 T14
Packaging
SO-14 TSSOP-14
7” Tape and Reel
Quantity
Part Number Suffix
2,500/Tape & Reel
-13
2,500/Tape & Reel
-13
Pin Descriptions
Pin Number
Pin Name
1 1OE
2 1A
3 1Y
4 2OE
5 2A
6 2Y
7 GND
8 3Y
9 3A
10 3OE
11 4Y
12 4A
13 4OE
14 VCC
Function
Data Enable Input (active high) Data Input Data Output Data Enable Input (active high) Data Input Data Output Ground Data Output Data Input Data Enable Input (active high) Data Output Data Input Data Enable Input (active high) Supply Voltage
Function Table
Inputs OE H H L
A H L X
Output Y H L Z
Logic Diagram
74AHCT126
Document number: DS35356 Rev. 3 - 2
2 of 9 www.diodes.com
April 2015
© Diodes Incorporated
74AHCT126
Absolute Maximum Ratings (Note 4) (TA = +25°C, unless otherwise specified.)
Symbol ESD HBM ESD CDM ESD MM
Description Human Body Model ESD Protection Charged Device Model ESD Protection Machine Model ESD Protection
Rating 2 1
200
Unit kV kV V
VCC VI IIK IOK IOK IO ICC IGND TJ TSTG PTOT
Supply Voltage Range Input Voltage Range Input Clamp Current VI < -0.5V Output Clamp Current VO < 0 V Output Clamp Current VO > VCC Continuous Output Current 0V < VO < VCC Continuous Current Through VCC Continuous Current Through GND Operating Junction Temperature Storage Temperature Total Power Dissipation
-0.5 to +7.0 -0.5 to +7.0
-20 -20 20 +/- 25 50 -50 -40 to +150 -65 to +150 500
V V mA mA mA mA mA mA °C °C mW
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.
Recommended Operating Conditions (Note 5) (TA = +25°C, unless otherwise specified.)
Symbol
Parameter
VCC VI VO ∆t/∆V
Supply Voltage Input Voltage Output Voltage Input transition Rise or Fall Rate
TA Operating Free-Air Temperature
Note:
5. Unused inputs should be held at VCC or Ground.
Min Max Unit
4.5 5.5
V
0 5.5 V
0 VCC V - 20 ns/V
-40 +125 °C
74AHCT126
Document number: DS35356 Rev. 3 - 2
3 of 9 www.diodes.com
April 2015
© Diodes Incorporated
Electrical Characteristics
Symbol
Parameter
Test Conditions
VIH VIL
VOH
VOL
IOZ II ICC ∆ICC
High-Level Input Voltage
Low-Level Input Voltage
-
High-Level Output IOH = -50µA
Voltage
IOH = -8mA
Low-Level Output Voltage
Z State Leakage Current
IOL = 50µA IOL = 8mA VO = 0 to 5.5V
Input Current
VI = GND to 5.5V
Supply Current VI = GND or VCC, IO = 0
Additional Supply One input at VCC –2.1V
Current
Other pins at VCC or GND
74AHCT126
Vcc
4.5V to 5.5V
4.5V to 5.5V 4.5V 4.5V 4.5V 4.5V 5.5V 3.6V 3.6V 5.5V
TA = -40°C to +85°C Min Max 2.0 -
- 0.8 4.4 3.80 -
- 0.1 - 0.44 - ±2.5 - ±1 - 20
- 1.35
TA = -40°C to +125°C Min Max 2.0 -
- 0.8 4.4 3.70 -
- 0.1 - 0.55 - ±10 - ±2 - 40
-5
Unit
V V V
V µA µA µA mA
Operating Characteristics
Parameter
Test Conditions
Cpd
Power Dissipation Capacitance per Gate
f = 1MHz
Ci
Input Capacitance
Vi = VCC – or GND
VCC = 5.5V Typ 14.8
4.0
Unit pF pF
Switching Characteristics (VCC = 4.5V to 5.5V)
Symbol
Parameter
Test Conditions
tPD
Propagation Delay AN to YN
Figure 1 CL = 15pF Figure 1 CL = 50pF
tEN Enable Time OEN to YN
Figure 1 CL = 15 pF Figure 1 CL = 50pF
tDIS Disable Time OEN to YN
Figure 1 CL = 15pF Figure 1 CL = 50pF
TA = +25.