µ/6240, µ6240

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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.

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.

SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244

SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244

SDLS144D – APRIL 1985 – REVISED OCTOBER 2016

SNx4LS24x, SNx4S24x Octal Buffers and Line Drivers With 3-State Outputs

1

1 Features

1

•

Inputs Tolerant Down to 2 V, Compatible With

3.3-V or 2.5-V Logic Inputs

•

Maximum tpd of 15 ns at 5 V

•

3-State Outputs Drive Bus Lines or Buffer Memory

Address Registers

•

PNP Inputs Reduce DC Loading

•

Hysteresis at Inputs Improves Noise Margins

2 Applications

•

Servers

•

LED Displays

•

Network Switches

•

Telecom Infrastructure

•

Motor Drivers

•

I/O Expanders

3 Description

The SNx4LS24x, SNx4S24x 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 non-

inverting 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

SN74LS24x and SN74S24x devices can be used to

drive terminated lines down to 133 Ω.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

SN54LS24x,

SN54S24x

CDIP (20) – J

24.20 mm × 6.92 mm

CFP (20) – W

7.02 mm × 13.72 mm

LCCC (20) – FK

8.89 mm × 8.89 mm

SN74LS240,

SN74LS244

SSOP (20) – DB

7.20 mm × 5.30 mm

SN74LS24x,

SN74S24x

SOIC (20) – DW

12.80 mm × 7.50 mm

PDIP (20) – N

24.33 mm × 6.35 mm

SN74LS24x

SOP (20) – NS

7.80 mm × 12.60 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Logic Diagram (Positive Logic)