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Part Number 74VHCT244ASJX
Manufacturer ON Semiconductor
Datasheet 74VHCT244ASJX Datasheet
Package 20-SOIC (0.209", 5.30mm Width)
In Stock 3,500 piece(s)
Unit Price $ 0.4718 *
Lead Time Can Ship Immediately
Estimated Delivery Time Aug 11 - Aug 16 (Choose Expedited Shipping)
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Part Number # 74VHCT244ASJX (Logic - Buffers, Drivers, Receivers, Transceivers) is manufactured by ON Semiconductor and distributed by Heisener. Being one of the leading electronics distributors, we carry many kinds of electronic components from some of the world’s top class manufacturers. Their quality is guaranteed by its stringent quality control to meet all required standards.

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74VHCT244ASJX Specifications

ManufacturerON Semiconductor
CategoryIntegrated Circuits (ICs) - Logic - Buffers, Drivers, Receivers, Transceivers
Datasheet 74VHCT244ASJXDatasheet
Package20-SOIC (0.209", 5.30mm Width)
Logic TypeBuffer, Non-Inverting
Number of Elements2
Number of Bits per Element4
Input Type-
Output Type3-State
Current - Output High, Low8mA, 8mA
Voltage - Supply4.5 V ~ 5.5 V
Operating Temperature-40°C ~ 85°C (TA)
Mounting TypeSurface Mount
Package / Case20-SOIC (0.209", 5.30mm Width)
Supplier Device Package20-SOP

74VHCT244ASJX Datasheet

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To learn more about ON Semiconductor, please visit our website at Please note: As part of the Fairchild Semiconductor integration, some of the Fairchild orderable part numbers will need to change in order to meet ON Semiconductor’s system requirements. Since the ON Semiconductor product management systems do not have the ability to manage part nomenclature that utilizes an underscore (_), the underscore (_) in the Fairchild part numbers will be changed to a dash (-). This document may contain device numbers with an underscore (_). Please check the ON Semiconductor website to verify the updated device numbers. The most current and up-to-date ordering information can be found at Please email any questions regarding the system integration to Is Now Part of ON Semiconductor and the ON Semiconductor logo are trademarks of Semiconductor Components Industries, LLC dba ON Semiconductor or its subsidiaries in the United States and/or other countries. ON Semiconductor owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of ON Semiconductor’s product/patent coverage may be accessed at ON Semiconductor reserves the right to make changes without further notice to any products herein. ON Semiconductor makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does ON Semiconductor assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. Buyer is responsible for its products and applications using ON Semiconductor products, including compliance with all laws, regulations and safety requirements or standards, regardless of any support or applications information provided by ON Semiconductor. “Typical” parameters which may be provided in ON Semiconductor data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. ON Semiconductor does not convey any license under its patent rights nor the rights of others. ON Semiconductor products are not designed, intended, or authorized for use as a critical component in life support systems or any FDA Class 3 medical devices or medical devices with a same or similar classification in a foreign jurisdiction or any devices intended for implantation in the human body. Should Buyer purchase or use ON Semiconductor products for any such unintended or unauthorized application, Buyer shall indemnify and hold ON Semiconductor and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that ON Semiconductor was negligent regarding the design or manufacture of the part. ON Semiconductor is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner.

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tm 7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts May 2007 ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 74VHCT244A Octal Buffer/Line Driver with 3-STATE Outputs Features ■ High Speed: t PD = 5.9ns (Typ.) at V CC = 5V ■ Power down protection is provided on inputs and outputs ■ Low power dissipation: I CC = 4 µ A (Max.) @ T A = 25°C ■ Pin and function compatible with 74HCT244 General Description The VHCT244A is an advanced high speed CMOS octal bus transceiver fabricated with silicon gate CMOS tech- nology. It achieves high speed operation similar to equiv- alent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The VHCT244A is a non- inverting 3-STATE buffer having two active-LOW output enables. This device is designed to be used as 3-STATE memory address drivers, clock drivers, and bus oriented transmitter/receivers. Protection circuits ensure that 0V to 7V can be applied to the input and output (1) pins without regard to the supply voltage. These circuits prevent device destruction due to mismatched supply and input/output voltages. This device can be used to interface 5V to 3V systems and two supply systems such as battery back up. Note: 1. Outputs in OFF-State Ordering Information Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter “X” to the ordering number. Pb-Free package per JEDEC J-STD-020B. Order Number Package Number Package Description 74VHCT244AM M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74VHCT244ASJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74VHCT244AMTC MTC20 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

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7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 2 Connection Diagram Pin Description Logic Symbol Truth Tables H = HIGH Voltage Level L = LOW Voltage Level Z = High Impedance Pin Names Description OE 1 , OE 2 3-STATE Output Enable Inputs I 0 –I 7 Inputs O 0 –O 7 3-STATE Outputs Inputs Outputs (Pins 12, 14, 16, 18)OE 1 I n L L L L H H H X Z Inputs Outputs (Pins 3, 5, 7, 9)OE 2 I n L L L L H H H X Z

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7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 3 Absolute Maximum Ratings Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In addition, extended exposure to stresses above the recommended operating conditions may affect device reliability. The absolute maximum ratings are stress ratings only. Recommended Operating Conditions (5) The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to absolute maximum ratings. Notes: 2. HIGH or LOW state. I OUT absolute maximum rating must be observed. 3. When outputs are in OFF-STATE or when V CC = 0V. 4. V OUT < GND, V OUT > V CC (Outputs Active). 5. Unused inputs must be held HIGH or LOW. They may not float. Symbol Parameter Rating V CC Supply Voltage –0.5V to +7.0V V IN DC Input Voltage –0.5V to +7.0V V OUT DC Output Voltage Note 2 Note 3 –0.5V to V CC + 0.5V –0.5V to +7.0V I IK Input Diode Current –20mA I OK Output Diode Current (4) ±20mA I OUT DC Output Current ±25mA I CC DC V CC / GND Current ±75mA T STG Storage Temperature –65°C to +150°C T L Lead Temperature (Soldering, 10 seconds) 260°C Symbol Parameter Rating V CC Supply Voltage 4.5V to +5.5V V IN Input Voltage 0V to +5.5V V OUT Output Voltage Note 2 Note 3 0V to V CC 0V to +5.5V T OPR Operating Temperature –40°C to +85°C t r , t f Input Rise and Fall Time, V CC = 5.0V ± 0.5V 0ns/V ~ 20ns/V

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7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 4 DC Electrical Characteristics Noise Characteristics Note: 6. Parameter guaranteed by design. Symbol Parameter V CC (V) Conditions T A = 25°C T A = –40°C to +85°C UnitsMin. Typ. Max. Min. Max. V IH HIGH Level Input Voltage 4.5 2.0 2.0 V 5.5 2.0 2.0 V IL LOW Level Input Voltage 4.5 0.8 0.8 V 5.5 0.8 0.8 V OH HIGH Level Output Voltage 4.5 V IN = V IH or V IL I OH = –50µA 4.40 4.50 4.40 V I OH = –8mA 3.94 3.80 V OL LOW Level Output Voltage 4.5 V IN = V IH or V IL I OL = 50µA 0.0 0.1 0.1 V I OL = 8mA 0.36 0.44 I OZ 3-STATE Output OFF-STATE Current 5.5 V IN = V IH or V IL , V OUT = V CC or GND ±0.25 ±2.5 µA I IN Input Leakage Current 0–5.5 V IN = 5.5V or GND ±0.1 ±1.0 µA I CC Quiescent Supply Current 5.5 V IN = V CC or GND 4.0 40.0 µA I CCT Maximum I CC / Input 5.5 V IN = 3.4V, Other Input = V CC or GND 1.35 1.50 mA I OFF Output Leakage Current (Power Down State) 0.0 V OUT = 5.5V 0.5 5.0 µA Symbol Parameter V CC (V) Conditions T A = 25°C UnitsTyp. Limits VOLP (6) Quiet Output Maximum Dynamic VOL 5.0 CL = 50pF 0.9 1.1 V VOLV (6) Quiet Output Minimum Dynamic VOL 5.0 CL = 50pF –0.9 –1.1 V VIHD (6) Minimum HIGH Level Dynamic Input Voltage 5.0 CL = 50pF 2.0 V VILD (6) Maximum HIGH Level Dynamic Input Voltage 5.0 CL = 50pF 0.8 V

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7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 5 AC Electrical Characteristics Notes: 7. Parameter guaranteed by design. tOSLH = |tPLH max – tPLH min|; tOSHL = |tPHL max – tPHL min| 8. CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (Opr.) = CPD • VCC • fIN + ICC / 8 (per F/F). The total CPD when n pcs. of the Octal D Flip-Flop operates can be calculated by the equation: CPD (total) = 20 + 12n Symbol Parameter VCC (V) Conditions TA = 25°C TA = –40°C to +85°C UnitsMin. Typ. Max. Min. Max. tPLH, tPHL Propagation Delay Time 5.0 ± 0.5 CL = 15pF 5.4 7.4 1.0 8.5 ns CL = 50pF 5.9 8.4 1.0 9.5 tPZL, tPZH 3-STATE Output Enable Time 5.0 ± 0.5 RL = 1kΩ CL = 15pF 7.7 10.4 1.0 12.5 ns CL = 50pF 8.2 11.4 1.0 13.5 tPLZ, tPHZ 3-STATE Output Disable Time 5.0 ± 0.5 RL = 1kΩ CL = 50pF 8.8 11.4 1.0 13.0 ns tOSLH, tOSHL Output to Output Skew 5.0 ± 0.5 (7) 1.0 1.0 ns CIN Input Capacitance VCC = Open 4 10 10 pF COUT Output Capacitance VCC = 5.0V 9 pF CPD Power Dissipation Capacitance (8) 18 pF

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7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 6 Physical Dimensions Dimensions are in millimeters unless otherwise noted. Figure 1. 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide Package Number M20B

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7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 7 Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 2. 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M20D

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7 4 V H C T 2 4 4 A O c ta l B u ffe r/L in e D riv e r w ith 3 -S T A T E O u tp u ts ©1997 Fairchild Semiconductor Corporation 74VHCT244A Rev. 1.3 8 Physical Dimensions (Continued) Dimensions are in millimeters unless otherwise noted. Figure 3. 20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide Package Number MTC20

74VHCT244ASJX Reviews

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July 14, 2020

Boundless range of products, ease of search and fast delivery continue to impress. Heisener is always my first stop for electronic components.


July 11, 2020

Very quick dispatch, arrived the next day. Item as described. Thanks!

Cal***** Dua

July 8, 2020

Packing good, very happy with goods, Very fast delivery, good service. Thanks


June 30, 2020

Can't speak to the long term reliability as of yet, but they seem to be of decent quality and I don't expect any issues.

Hai***** Bahl

June 26, 2020

Very Quick,no problems - Thank you.

Vero***** Bobal

June 25, 2020

A convenient and small package. I have used 2 of the 10 units so far and they work fine.


June 22, 2020

Tested one of them and works good.


June 20, 2020

Very much appreciate the thoughtful system to hold multiple orders, including back ordered items, can be shipped at once rather than incremental shipments.


June 10, 2020

good item, quick delivery, prefer to recommended.


June 5, 2020

Very supportive of my small orders, but very glad easy to work with. Hard to see how it could be any more efficient!

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