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Part: 7801201SA
Category:
Logic
-> Buffers/Drivers
-> Inverting Buffers and Drivers
Description: ti SN54LS240, Octal Buffers And Line Drivers With 3-State Outputs
Company: Texas Instruments, Inc.
Datasheet: Download 7801201SA datasheet File size : 415 kB
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Datasheet text preview:
SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B APRIL 1985 REVISED FEBRUARY 2002
D D D
3-State Outputs Drive Bus Lines or Buffer Memory Address Registers PNP Inputs Reduce DC Loading Hysteresis at Inputs Improves Noise Margins
SN54LS', SN54S' . . . J OR W PACKAGE SN74LS240, SN74LS244 . . . DB, DW, N, OR NS PACKAGE SN74LS241 . . . DW, N, OR NS PACKAGE SN74S' . . . DW OR N PACKAGE (TOP VIEW)
description
These octal buffers and line drivers are designed specifically to improve both the performance and density of three-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The designer has a choice of selected combinations of inverting and noninverting outputs, symmetrical, active-low output-control (G) inputs, and complementary output-control (G and G) inputs. These devices feature high fan-out, improved fan-in, and 400-mV noise margin. The SN74LS' and SN74S' devices can be used to drive terminated lines down to 133 .
1G 1A1 2Y4 1A2 2Y3 1A3 2Y2 1A4 2Y1 GND
1 2 3 4 5 6 7 8 9 10
20 19 18 17 16 15 14 13 12 11
VCC 2G/2G 1Y1 2A4 1Y2 2A3 1Y3 2A2 1Y4 2A1
2G for 'LS241 and 'S241 or 2G for all other drivers.
SN54LS', SN54S' . . . FK PACKAGE (TOP VIEW)
1A2 2Y3 1A3 2Y2 1A4
4 5 6 7 8
3 2 1 20 19 18 17 16 15 14 9 10 11 12 13
2Y4 1A1 1G VCC
2G/2G 1Y1 2A4 1Y2 2A3 1Y3
2G for 'LS241 and 'S241 or 2G for all other drivers.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright 2002, Texas Instruments Incorporated
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.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
2Y1 GND 2A1 1Y4 2A2
1
SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B APRIL 1985 REVISED FEBRUARY 2002
ORDERING INFORMATION
TA PACKAGE ORDERABLE PART NUMBER SN74LS240N SN74LS241N PDIP N Tube SN74LS244N SN74S240N SN74S241N SN74S244N Tube Tape and reel Tube Tape and reel Tube 0°C to 70°C SOIC DW DW Tape and reel Tube Tape and reel Tube Tape and reel Tube Tape and reel SOP NS Tube SN74LS240DW SN74LS240DWR SN74LS241DW SN74LS241DWR SN74LS244DW SN74LS244DWR SN74S240DW SN74S240DWR SN74S241DW SN74S241DWR SN74S244DW SN74S244DWR SN74LS240NSR SN74LS241NSR SN74LS244NSR SSOP DB DB Tape and reel and reel SN74LS240DBR SN74LS244DBR TOP-SIDE MARKING SN74LS240N SN74LS241N SN74LS244N SN74S240N SN74S241N SN74S244N LS240 LS241 LS244 S240 S241 S244 74LS240 74LS241 74LS244 LS240
LS244 Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B APRIL 1985 REVISED FEBRUARY 2002
ORDERING INFORMATION (CONTINUED)
TA PACKAGE ORDERABLE PART NUMBER SN54LS240J SNJ54LS240J SN54LS241J SNJ54LS241J SN54LS244J CDIP J Tube SNJ54LS244J SN54S240J SNJ54S240J SN54S241J SNJ54S241J SN54S244J 55°C to 125°C to 125°C SNJ54S244J SNJ54LS240W SNJ54LS241W CFP W Tube SNJ54LS244W SNJ54S240W SNJ54S241W SNJ54S244W SNJ54LS240FK SNJ54LS241FK LCCC FK FK Tube SNJ54LS244FK SNJ54S240FK SNJ54S241FK TOP-SIDE MARKING SN54LS240J SNJ54LS240J SN54LS241J SNJ54LS241J SN54LS244J SNJ54LS244J SN54S240J SNJ54S240J SN54S241J SNJ54S241J SN54S244J SNJ54S244J SNJ54LS240W SNJ54LS241W SNJ54LS244W SNJ54S240W SNJ54S241W SNJ54S244W SNJ54LS240FK SNJ54LS241FK SNJ54LS244FK SNJ54S240FK SNJ54S241FK
SNJ54S244FK SNJ54S244FK Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B APRIL 1985 REVISED FEBRUARY 2002
schematics of inputs and outputs
'LS240, 'LS241, 'LS244 EQUIVALENT OF EACH INPUT VCC 9 k NOM 'S240, 'S241, 'S244 EQUIVALENT OF EACH INPUT VCC Req
Input Input
G and G inputs: Req = 2 k NOM A inputs: Req = 2.8 k NOM
TYPICAL OF ALL OUTPUTS VCC R
Output
GND
'LS240. 'LS241, 'LS244: R = 50 NOM 'S240, `S241, S244: R = 25 NOM
4
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244 SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244 OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B APRIL 1985 REVISED FEBRUARY 2002
logic diagram
'LS240, 'S240 1G 1 1G 2 18 1Y1 1A1 4 16 1Y2 1A2 6 14 1Y3 1A3 8 12 1Y4 1A4 19 2G 9 1 'LS241, 'S241
1A1
2
18
1Y1
1A2
4
16
1Y2
1A3
6
14
1Y3
1A4
8 19
12
1Y4
2G
2A1
11
2Y1
2A1
11
9
2Y1
2A2
13
7
2Y2
2A2
13
7
2Y2
2A3
15
5
2Y3
2A3
15
5
2Y3
2A4
17
3
2Y4 'LS244, 'S244
2A4
17
3
2Y4
1G
1
1A1
2
18
1Y1
1A2
4
16
1Y2
1A3
6
14
1Y3
1A4
8
12
1Y4
2G
19
2A1
11
9
2Y1
2A2
13
7
2Y2
2A3
15
5
2Y3
2A4
17
3
2Y4
Pin numbers shown are for DB, DW, J, N, NS, and W packages.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
5
Others parts begin by 78
78-1 78-2 78-3
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