CD74AC244M96G4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments CD74AC244M96G4 is an 8-channel non-inverting 3-state bus driver in a 20-pin SOIC package, supporting unidirectional signal buffering with active-low output enable. Key specs: 12 mA output drive per channel, 50 pF load capacitance, propagation delay ~5 ns at 5V, AC-family CMOS speed. Available from authorized distributors with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- CD74AC244M96G4 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
What are the key features of CD74AC244M96G4?
- 8-channel non-inverting 3-state bus driver with 12 mA output drive per pin, enabling direct backplane or multi-load bus driving without external buffers
- AC-family CMOS technology delivers approximately 5 ns propagation delay at 5V and 50 pF, supporting bus switching at frequencies up to 100 MHz
- Active-low output enable with two independent OE pins allows half-bus (4-channel) or full-bus (8-channel) control, providing flexible unidirectional bus isolation
- 3-state outputs enable bus sharing among multiple drivers on a common 8-bit data bus, preventing output contention in multiplexed memory and I/O designs
What is CD74AC244M96G4 used for?
The CD74AC244M96G4 is a high-speed 8-channel buffer used to drive high-capacitance PCB buses and isolate sensitive microcontroller or FPGA output pins from large fanout loads of up to 12 mA per channel. Its 3-state outputs allow multiple CD74AC244 devices to share a single 8-bit data bus in memory-mapped I/O designs, industrial controllers, and communication interface boards. The compact 20-pin SOIC package and AC-family speed make it a standard glue-logic component in address bus drivers, peripheral expansion circuits, and data multiplexing stages operating at 5V.
What are the specifications of CD74AC244M96G4?
| YTEOL | 0 |
| Additional Feature | OUTPUT ENABLE ACTIVE HIGH FOR ONE FUNCTION |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | AC |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.012A |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Prop. Delay@Nom-Sup | 11.5ns |
| Propagation Delay (tpd) | 93ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| 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 |
Where can I find the CD74AC244M96G4 datasheet?
CD74AC244M96G4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CD74AC244M96G4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the output drive current of the CD74AC244M96G4 and why does that matter for driving bus loads?
Each output of the CD74AC244M96G4 can sink or source up to 12 mA at 5V, which is three times the 4 mA drive capability of standard HC-family buffers. This higher drive strength allows the device to directly drive 8 parallel traces with 50 pF capacitance each at bus frequencies up to 100 MHz without the signal degradation or added propagation delay caused by insufficient drive current on long PCB traces or high-fanout buses.
How fast does the CD74AC244M96G4 switch signals compared to HC-family equivalents and what applications benefit from this?
The AC-family CD74AC244M96G4 has a typical propagation delay of approximately 5 ns at 5V with 50 pF load, roughly half the 9-10 ns delay of the HC-family CD74HC244. This speed advantage benefits memory address bus drivers, FPGA I/O expansion, and high-frequency signal routing applications where bus cycle times are under 20 ns, such as synchronous SRAM interfaces clocked at 50 MHz or faster.
How do the two active-low output enable pins on the CD74AC244M96G4 support split-bus or half-bus designs?
The CD74AC244M96G4 has two independent OE pins, each controlling 4 of the 8 output channels. Asserting OE1 LOW while OE2 remains HIGH enables only the lower 4 channels, allowing the device to function as two independent 4-bit buffers on a shared 8-bit bus. This is useful in 8-bit bus designs where the high byte and low byte must be independently gated, such as in 16-bit memory interfaces using two 8-bit data devices.
For a high-density board, what is the footprint of the CD74AC244M96G4 SOIC-20 package and how does it compare to a DIP alternative?
The SOIC-20 package measures approximately 12.8 mm × 7.5 mm with 1.27 mm lead pitch, occupying about 96 mm² of PCB area. A comparable 20-pin DIP package requires approximately 300 mm², so the SOIC reduces footprint by over 65%. For designs targeting boards smaller than 100 mm × 100 mm with more than 5 logic ICs, the SOIC-20 is the preferred package to meet density requirements while maintaining hand-soldering or reflow-compatible assembly.
When is the CD74AC244M96G4 preferable to an LVTTL-compatible buffer for 3.3V system designs?
The CD74AC244M96G4 is specified for 5V operation with AC-family switching thresholds. For 3.3V systems requiring 12 mA drive with similar propagation delay under 10 ns, the 74ALVCH244 or 74LVC244A would be preferable, as they are specified at 3.3V with guaranteed 12 mA output current across -40°C to +85°C. The CD74AC244 remains the correct choice on 5V backplanes where logic HIGH threshold compatibility with 5V TTL receivers must be maintained across the 0V to 5V supply range.
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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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