Document
SN54HC244, SN74HC244
SCLS130F – DECEMBER 1982 – REVISED MAY 2022
SNx4HC244 Octal Buffers and Line Drivers With 3-State Outputs
1 Features
• Wide Operating Voltage Range of 2 V to 6 V • High-Current Outputs Drive Up to 15 LSTTL Loads • 3-State Outputs Drive Bus Lines or Buffer Memory
Address Registers • Low Power Consumption: ICC, 80-µA (Maximum) • Typical tpd = 11 ns • ±6-mA Output Drive at 5 V • Low Input Current of 1 µA (Maximum) • On Products Compliant to MIL-PRF-38535,
All Parameters Are Tested Unless Otherwise Noted. On All Other Products, Production Processing Does Not Necessarily Include Testing of All Parameters.
2 Applications
• Servers • LED Displays • Network Switches • Telecom Infrastructure • Motor Drivers • I/O Expanders
1OE 1
3 Description
The SNx4HC244 octal buffers and line drivers are designed specifically to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The SNx4HC244 devices are organized as two 4bit buffers and drivers with separate output-enable (OE) inputs. When OE is low, the device passes noninverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the highimpedance state.
Device Information
PART NUMBER PACKAGE (PINS)(1) BODY SIZE (NOM)
CDIP (20)
6.92 mm × 24.38 mm
SN54HC244
CFP (20)
6.92 mm × 13.72 mm
LCCC (20)
8.89 mm × 8.89 mm
SN74HC244DB
SSOP (20)
5.30 mm × 7.25 mm
SN74HC244DW SOIC (20)
7.50 mm × 12.80 mm
SN74HC244N
PDIP (20)
6.30 mm × 25.40 mm
SN74HC244NS
SOP (20)
5.30 mm × 12.60 mm
SN74HC244PW TSSOP (20)
4.40 mm × 6.50 mm
(1) For all available packages, see the orderable addendum at the end of the data sheet.
2OE 19
2 1A1
18 1Y1
11 2A1
9 1Y1
4 1A2
16 1Y1
13 2A2
7 1Y1
6 1A3
14 1Y1
15 2A3
5 1Y1
8 1A4
12 1Y4
17 2A4
3 1Y4
Copyright © 2016, Texas Instruments Incorporated
Logic Diagram (Positive Logic)
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
SN54HC244, SN74HC244
SCLS130F – DECEMBER 1982 – REVISED MAY 2022
www.ti.com
Table of Contents
1 Features............................................................................1 2 Applications..................................................................... 1 3 Description.......................................................................1 4 Revision History.............................................................. 2 5 Pin Configuration and Functions...................................3
Pin Functions.................................................................... 3 6 Specifications.................................................................. 4
6.1 Absolute Maximum Ratings........................................ 4 6.2 ESD Ratings............................................................... 4 6.3 Recommended Operating Conditions.........................4 6.4 Thermal Information....................................................5 6.5 Electrical Characteristics.............................................5 6.6 Electrical Characteristics – SN54HC244.................... 5 6.7 Electrical Characteristics – SN74HC244.................... 6 6.8 Switching Characteristics............................................6 6.9 Switching Characteristics – CL = 50 pF...................... 8 6.10 Switching Characteristics – CL = 150 pF.................. 8 6.11 Typical Characteristic................................................ 9 7 Parameter Measurement Information.......................... 10 8 Detailed Description......................................................12
8.1 Overview................................................................... 12 8.2 Functional Block Diagram......................................... 12 8.3 Feature Description...................................................12 8.4 Device Functional Modes..........................................12 9 Application and Implementation.................................. 13 9.1 Application Information............................................. 13 9.2 Typical Application.................................................... 13 10 Power Supply Recommendations..............................14 11 Layout........................................................................... 14 11.1 Layout Guidelines................................................... 14 11.2 Layout Example...................................................... 14 12 Device and Documentation Support..........................15 12.1 Documentation Support.......................................... 15 12.2 Receiving Notification of Documentation Updates..15 12.3 Support Resources................................................. 15 12.4 Trademarks............................................................. 15 12.5 Electrostatic Disc.