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Inverting buffers & drivers

SN74HC240

ACTIVE

8-ch, 2V to 6V inverters with 3-state outputs

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Data sheet

SN74HC240

ACTIVE
Data sheet Order now

Product details

Technology family HC Number of channels 8 IOL (max) (mA) 6 IOH (max) (mA) -6 Supply current (max) (µA) 80 Input type Standard CMOS Output type 3-State Features Balanced outputs, Input clamp diode, Very high speed (tpd 5-10ns) Rating Catalog Operating temperature range (°C) -40 to 125
Technology family HC Number of channels 8 IOL (max) (mA) 6 IOH (max) (mA) -6 Supply current (max) (µA) 80 Input type Standard CMOS Output type 3-State Features Balanced outputs, Input clamp diode, Very high speed (tpd 5-10ns) Rating Catalog Operating temperature range (°C) -40 to 125
PDIP (N) 20 228.702 mm² (24.33 mm × 9.4 mm) TSSOP (PW) 20 41.6 mm² (6.5 mm × 6.4 mm) SOP (NS) 20 98.28 mm² (12.6 mm × 7.8 mm) SSOP (DB) 20 56.16 mm² (7.2 mm × 7.8 mm) SOIC (DW) 20 131.84 mm² (12.8 mm × 10.3 mm) VSSOP (DGS) 20 24.99 mm² (5.1 mm × 4.9 mm)
  • Wide operating voltage range of 2V to 6V
  • High-current outputs drive up to 15 LSTTL loads
  • Low power consumption, 80µA max ICC
  • Typical tpd = 9ns
  • ±6mA output drive at 5V
  • Low input current of 1µA max
  • 3-state outputs drive bus lines or buffer memory address registers
  • Wide operating voltage range of 2V to 6V
  • High-current outputs drive up to 15 LSTTL loads
  • Low power consumption, 80µA max ICC
  • Typical tpd = 9ns
  • ±6mA output drive at 5V
  • Low input current of 1µA max
  • 3-state outputs drive bus lines or buffer memory address registers

These 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 ’HC240 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low, the device passes inverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.

These 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 ’HC240 devices are organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low, the device passes inverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state.
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SN74AHCT240 ACTIVE 8-ch, 4.5-V to 5.5-V inverters with TTL-compatible CMOS inputs Voltage range 4.5V to 5.5V, average propagation delay 9ns, average drive strength 8mA
SN74AC240 ACTIVE 8-ch, 2-V to 6-V inverters with 3-state outputs Voltage range 2V to 6V, average propagation delay 7ns, average drive strength 24mA

Technical documentation

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Top documentation Type Title Format options Date
* Data sheet SNx4HC240 Octal Buffers and Line Drivers With 3-State Outputs datasheet (Rev. H) PDF | HTML Aug 22, 2024
Application brief Using Linear Interpolation to Estimate Specification Values PDF | HTML Apr 13, 2026

Design & development

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Evaluation board

14-24-LOGIC-EVM — Logic product generic evaluation module for 14-pin to 24-pin D, DB, DGV, DW, DYY, NS and PW packages

The 14-24-LOGIC-EVM evaluation module (EVM) is designed to support any logic device that is in a 14-pin to 24-pin D, DW, DB, NS, PW, DYY or DGV package,

User guide: PDF | HTML
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Simulation model

SN74HC240 Behavioral SPICE Model

SCLM221.ZIP (7 KB) - PSpice model
Supported products & hardware
Package Pins CAD symbols, footprints & 3D models
PDIP (N) 20 Ultra Librarian
TSSOP (PW) 20 Ultra Librarian
SOP (NS) 20 Ultra Librarian
SSOP (DB) 20 Ultra Librarian
SOIC (DW) 20 Ultra Librarian
VSSOP (DGS) 20 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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