SN74AHC240NSRE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
SN74AHC240NSRE4 is an octal inverting buffer and line driver with 3-state outputs in a 20-pin SOIC package, operating from 2 V to 5.5 V supply voltage. It features active-low output enable control, 8 mA sink current per channel, and AHC-family switching speeds for bus driving applications.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- SN74AHC240NSRE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-channel inverting buffer with 3-state output control
- Wide supply voltage range 2 V to 5.5 V
- Active-low output enable for bus isolation
- 8 mA output sink current per channel at 50 pF load
- AHC-family high-speed CMOS logic with low propagation delay
- 20-pin SOIC surface-mount package
- AEC-Q100 automotive-grade E4 qualification
- Unidirectional data flow with output disable capability
Applications
SN74AHC240NSRE4 is used in data bus buffering and address line driving in microprocessor and microcontroller systems where signal isolation and drive strength are required. The 3-state outputs make it ideal for shared bus architectures in industrial control, automotive body electronics, and communication equipment. It also serves in memory expansion circuits and peripheral interface cards where multiple 3-state drivers share a common data bus.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AHC/VHC/H/U/V |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.008A |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR, 13 INCH |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.04mA |
| Prop. Delay@Nom-Sup | 8.5ns |
| Propagation Delay (tpd) | 30ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74AHC240NSRE4:
suggested
suggested
Frequently Asked Questions
How many channels does the SN74AHC240NSRE4 provide, and what is the output sink current per channel?
The SN74AHC240NSRE4 provides 8 buffered output channels, each capable of sinking 8 mA at a load capacitance of 50 pF. This drive strength makes it suitable for bus driving applications in 2 V to 5.5 V systems including automotive and industrial designs.
Can SN74AHC240NSRE4 be used in a 3.3 V microcontroller system interfacing with 5 V bus logic?
Yes, the AHC family input thresholds accept signals from 2 V to 5.5 V supplies, so SN74AHC240NSRE4 can buffer 3.3 V controller outputs onto a 5 V bus. The 3-state outputs allow bus sharing with other drivers through the active-low enable pin.
What package does SN74AHC240NSRE4 use, and how many pins does it have?
The device is housed in a 20-pin SOIC (Small Outline IC) surface-mount package with a standard 1.27 mm pitch, suitable for automated PCB assembly. Its compact form factor fits tight board layouts in automotive modules and industrial controllers.
When would a designer select SN74AHC240NSRE4 over a non-inverting buffer like SN74AHC244?
A designer selects SN74AHC240NSRE4 when signal polarity inversion is needed alongside 3-state bus control, for example in address decoding paths where active-low chip-select signals must drive 8 lines simultaneously at 8 mA per output without loading the microcontroller.
Is SN74AHC240NSRE4 qualified for automotive use, and what operating temperature range does it support?
Yes, the E4 suffix indicates AEC-Q100 automotive grade qualification with a -40°C to +125°C operating temperature range. This makes it reliable for under-dash wiring harness controllers, body control modules, and other automotive environments with thermal variation.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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