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SN74LS244N on a board, in 3D

SN74LS244N

Texas Instruments

0℃~+70℃ 12ns@5V,45pF 15mA 2 24mA 4 4.75V~5.25V 54mA 74LS Output enable、Level shifting Schmitt trigger Tri-State Unidirectional DIP-20 Buffers, Drivers, Receivers, Transceivers ROHS

Extended
DatasheetJLCPCBLCSCti/SN74LS244N
Category
Buffers, Drivers, Receivers, Transceivers
Package
DIP-20
Pins
20

Overview

The SN74LS244N is a buffers, Drivers, Receivers, Transceiver made by Texas Instruments in a DIP-20 package with 20 pins. 0℃~+70℃ 12ns@5V,45pF 15mA 2 24mA 4 4.75V~5.25V 54mA 74LS Output enable、Level shifting Schmitt trigger Tri-State Unidirectional DIP-20 Buffers, Drivers, Receivers, Transceivers ROHS.

PCBKit's library has its KiCad symbol (74xx:74LS244, from KiCad's library) and its footprint (Package_DIP:DIP-20_W7.62mm, from KiCad's library), ready for a KiCad board. 39 are in stock at JLCPCB (part C352965). 2 open-source boards in 2 repositories on GitHub use it.

Symbol

OEa1I0a2O3b3I1a4O2b5I2a6O1b7I3a8O0b9GND10I0b11O3a12I1b13O2a14I2b15O1a16I3b17O0a18OEb19VCC20
74xx:74LS244From KiCad's library

Footprint

1234567891011121314151617181920
Package_DIP:DIP-20_W7.62mmFrom KiCad's library

From the datasheet

20
Supply, least
4.75 V · VCC, recommended operating, min · p. 4
Supply, most
5.25 V · VCC, recommended operating, max · p. 4
Supply, absolute maximum
7 V · VCC, absolute maximum · p. 4
Works from
0 °C · operating free-air temperature, min · p. 4
Works up to
70 °C · operating free-air temperature, max · p. 4
Takes working
27 mA · VCC, outputs low and open, 5 V, 25°C, typical · p. 5
Takes at most
54 mA · VCC, outputs disabled and open, VCC = max, max · p. 5
A pin gives at most
24 mA · per output, low-level sink current, recommended max · p. 4
Junction to air (DB (SSOP))
94.3 K/W · junction-to-ambient thermal resistance · p. 5
Junction to air (DW (SOIC))
90.3 K/W · junction-to-ambient thermal resistance · p. 5
Junction to air (N (PDIP))
50.6 K/W · junction-to-ambient thermal resistance · p. 5
Junction to air (NS (SOP))
76.6 K/W · junction-to-ambient thermal resistance · p. 5
Junction to board (DB (SSOP))
49.5 K/W · junction-to-board thermal resistance · p. 5
Junction to board (DW (SOIC))
48.1 K/W · junction-to-board thermal resistance · p. 5
Junction to board (N (PDIP))
31.5 K/W · junction-to-board thermal resistance · p. 5
Junction to board (NS (SOP))
44.1 K/W · junction-to-board thermal resistance · p. 5
Junction to case (DB (SSOP))
55.9 K/W · junction-to-case (top) thermal resistance · p. 5
Junction to case (DW (SOIC))
45.5 K/W · junction-to-case (top) thermal resistance · p. 5
Junction to case (N (PDIP))
37.4 K/W · junction-to-case (top) thermal resistance · p. 5
Junction to case (NS (SOP))
42.9 K/W · junction-to-case (top) thermal resistance · p. 5

Parameters

16
Channel Type
Unidirectional
Current - Output High(IOH)
15mA
Current - Output Low(IOL)
24mA
Current - Supply(Max)
54mA
Features
Output enable
Input type
Schmitt trigger
Logic Family
74LS
Number of Bits per Element
4
Number of Elements
2
Operating Temperature
0℃~+70℃
Output Current per Pin(Max)
24mA
Propagation Delay
12ns@5V,45pF
Quiescent Current
27mA
Voltage - Supply
4.75V~5.25V
Voltage - Supply(Absolute Max)
7V
output type
Tri-State

Order codes

1

Pinout

20
The pins of the SN74LS244N
PinNameType
1OEaInput
2I0aInput
3O3bTri-state
4I1aInput
5O2bTri-state
6I2aInput
7O1bTri-state
8I3aInput
9O0bTri-state
10GNDPower in
11I0bInput
12O3aTri-state
13I1bInput
14O2aTri-state
15I2bInput
16O1aTri-state
17I3bInput
18O0aTri-state
19OEbInput
20VCCPower in

Open-source boards using it

All 2
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    114 parts1LGPL-2.1

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Questions

Is there a KiCad symbol and footprint for the SN74LS244N?

Yes. The symbol is 74xx:74LS244 and the footprint Package_DIP:DIP-20_W7.62mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the SN74LS244N?

DIP-20, with 20 pins. Its footprint is drawn on this page.

Where is the SN74LS244N datasheet?

Texas Instruments publishes it: the Datasheet link on this page opens it.

Where can I order the SN74LS244N?

JLCPCB lists it as part C352965, with 39 in stock; the sellers' links on this page open their listings.

What can replace the SN74LS244N?

Parts like it in the library: the 74HC541D by GR, the SN74HC240N(XBLW) by XBLW, the SN74HC244N(XBLW) by XBLW and the 74HC245N by HGSEMI. Check their datasheets: a part that fits the footprint may still differ in its ratings.

Which open-source boards use the SN74LS244N?

2 boards in 2 repositories on GitHub; the most starred are listed on this page, with their KiCad files.

Parts like it

8