CD74AC240E Texas Instruments Integrated Circuit (Dual-In-Line Packages) In Stock
CD74AC240E is an octal inverting buffer and line driver with 3-state outputs by Texas Instruments, featuring active-low output enable for bus control. Key specs: AC family, 20-pin DIP package, 50pF load capacitance, unidirectional signal path. From $0.75, in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Dual-In-Line Packages
- Pin Count
- 20
- Lifecycle
- ACTIVE
- Datasheet
- CD74AC240E Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Octal inverting buffer with 3-state outputs and active-low output enable providing full bus isolation and tri-state bus management
- AC (Advanced CMOS) family delivering high-speed switching performance with low power consumption for demanding bus driver applications
- 20-pin through-hole DIP package (R-PDIP-T20) supporting easy breadboard prototyping, manual assembly, and long-lifecycle industrial designs
Applications
The CD74AC240E is widely used as a bus driver and signal buffer in microprocessor address and data bus systems requiring inverting line drive with 3-state output capability. Its high output drive strength makes it ideal for driving long PCB traces, backplane buses, and capacitive loads in industrial controllers and computing peripherals. The device is also used in signal inversion and bus isolation circuits in legacy through-hole designs and educational prototype boards.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | OUTPUT ENABLE ACTIVE HIGH FOR ONE FUNCTION |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AC |
| JESD-30 Code | R-PDIP-T20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.024A |
| Number of Bits | 4 |
| Number of Functions | 8 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP20,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Packing Method | TUBE |
| Power Supply Current-Max (ICC) | 0.16mA |
| Prop. Delay@Nom-Sup | 10.1ns |
| Propagation Delay (tpd) | 82ns |
| Qualification Status | Not Qualified |
| Screening Level | 38535Q/M;38534H;883B |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | NO |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD74AC240E:
Frequently Asked Questions
What is the difference between the CD74AC240E and a non-inverting buffer?
The CD74AC240E is an inverting buffer, meaning each output is the logical complement of its corresponding input. Non-inverting buffers pass the signal unchanged, while the CD74AC240E inverts each of the eight signal channels, useful for applications requiring polarity reversal.
How does the output enable work on the CD74AC240E?
The CD74AC240E uses an active-low output enable control. When the OE pin is driven low, all eight output drivers are active. When OE is driven high, all outputs enter a high-impedance 3-state condition, disconnecting the device from the bus.
What package does the CD74AC240E use?
The CD74AC240E comes in a 20-pin plastic dual-in-line through-hole package (JESD-30 code R-PDIP-T20), which is compatible with standard 0.1-inch pitch sockets and breadboards, ideal for prototyping and through-hole PCB assembly.
Is the CD74AC240E suitable for driving bus lines?
Yes, the CD74AC240E is specifically designed as a line driver with high output drive current capability in the AC family, capable of driving heavily loaded bus lines and long PCB traces in industrial and computing applications with minimal signal degradation.
Is the CD74AC240E RoHS compliant?
Yes, the CD74AC240E carries a Pb-free code of 'Yes' and JESD-609 code e4, confirming it complies with RoHS lead-free requirements for use in environmentally regulated global markets and modern manufacturing processes.
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About Texas Instruments
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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