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onsemi 74ABT2244CSC
- Part No.:
- 74ABT2244CSC
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT2244CSC.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,340
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Product details
Overview
74ABT2244CSC from Fairchild Semiconductor is an octal non-inverting buffer/line driver with integrated 25Ω series output resistors, designed for driving capacitive loads in memory, address, clock, and bus-oriented systems. It operates at 4.5V–5.5V, delivers 32mA output drive (IOH), supports 3-state outputs via dual active-low enables (OE1/OE2), and features guaranteed latchup protection.
For engineers reviewing the 74ABT2244CSC datasheet, pinout, applications, or equivalent options, key selection criteria include its 25Ω built-in series termination, sub-4ns propagation delay, hot-insertion capability, and SOIC-20 (M20B) packaging for high-density PCB layouts.
Technical Context
The 74ABT2244CSC implements two independent 4-bit groups (I0–I3/O0–O3 and I4–I7/O4–O7), each controlled by a dedicated active-low output enable (OE1, OE2). Its internal 25Ω series resistors suppress signal ringing without external components, enabling clean edge transitions into 50pF loads.
It meets ABT logic family specifications: TTL-compatible inputs (VIH = 2.0V, VIL = 0.8V), rail-to-rail output swing (VOH ≥ 2.0V at –32mA, VOL ≤ 0.8V at 15mA), and robust bus isolation during power-up/down cycles with glitch-free high-impedance states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +4.5V to +5.5V - Ensures compatibility with standard 5V TTL/CMOS systems and stable operation across industrial temperature range. |
| Propagation Delay (tPLH/tPHL) | 1.0–3.9ns - Enables high-speed data routing in memory and address buses up to ~250MHz effective toggle rate. |
| Output Drive (IOH/IOL) | –32mA / +15mA - Sufficient to directly drive multiple CMOS inputs or terminated transmission lines without buffering. |
| Integrated Series Resistor | 25Ω per output - Eliminates need for discrete series termination resistors, reducing BOM count and PCB area. |
| 3-State Enable Timing (tPZH/tPHZ) | 1.5–6.0ns - Supports fast bus arbitration and dynamic bus sharing in multi-master systems. |
| Input/Output Capacitance | CIN = 5.0pF, COUT = 9.0pF - Minimizes loading on upstream drivers and improves signal integrity in high-fanout configurations. |
Pinout & Package
74ABT2244CSC is housed in a 20-lead Small Outline Integrated Circuit (SOIC) package per JEDEC MS-013, 0.300" wide (Package Number M20B).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low output enable controls first and second 4-bit groups respectively; both must be LOW for corresponding outputs to drive. |
| 2–5, 13–16 | I0–I3, I4–I7 | Data inputs for eight channels; TTL-compatible thresholds ensure reliable interfacing with legacy logic families. |
| 6–9, 17–20 | O0–O3, O4–O7 | Non-inverting buffered outputs each with integrated 25Ω series resistor; support 3-state when OE is HIGH. |
| 10 | GND | Ground reference for all signals and power return path. |
| 20 | VCC | +5V supply input; decoupling capacitor required near pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25Ω series output resistors | Eliminates external termination components, reduces layout complexity, and suppresses overshoot/ringing on PCB traces. |
| Guaranteed latchup protection | Withstands >300mA latchup current, ensuring robustness against transient overvoltage and ESD-induced parasitic thyristor activation. |
| Hot-insertion capability | Nondestructive operation during live insertion into powered backplanes or hot-swap modules without damaging the device or system. |
| Glitch-free 3-state during power sequencing | Maintains high-impedance outputs across full VCC ramp (–55°C to +125°C), preventing bus contention during power-up/down. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or EPROM chips on a shared memory bus. IC Role / Device Role / Timing Role: Non-inverting octal buffer with 25Ω series termination ensures clean, low-skew address propagation and minimizes reflections. Use Value: Reduces signal integrity issues in parallel memory architectures without adding discrete resistors or increasing trace length mismatch. |
Use Scenario: Isolating and driving bidirectional data bus segments between CPU and peripheral controllers in industrial PLC backplanes. IC Role / Device Role / Timing Role: Dual-enable 3-state buffer provides group-level control for time-multiplexed bus access with sub-6ns disable timing. Use Value: Enables deterministic bus arbitration and eliminates contention during state transitions in multi-drop environments. |
| High-Speed Clock Distribution | Legacy System Signal Conditioning |
Use Scenario: Distributing a 50MHz system clock to multiple synchronous logic blocks while maintaining edge fidelity. IC Role / Device Role / Timing Role: Low-propagation-delay line driver with matched output impedance minimizes jitter accumulation and duty-cycle distortion. Use Value: Achieves <4ns skew across eight outputs, supporting tight timing budgets in FPGA configuration and ADC sampling clocks. |
Use Scenario: Interfacing modern microcontrollers with legacy TTL peripherals requiring higher drive strength and noise immunity. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer with 32mA drive capability and 0.8V/2.0V input thresholds. Use Value: Replaces discrete transistor arrays or older 74-series buffers while improving reliability and reducing board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT2244DBR | TI's TSSOP-20 variant; identical AC/DC specs but 4.4mm body width vs. 7.5mm SOIC of 74ABT2244CSC. | Better suited for space-constrained designs; requires rework of land pattern and stencil. | Select when PCB real estate is limited and thermal dissipation requirements align with TSSOP thermal resistance. |
| 74LVT2244PW | NXP's LVT-family version; operates at 2.7–3.6V only, lower drive (–24mA/16mA), no integrated 25Ω resistors. | Requires external series termination; incompatible with 5V-only systems. | Choose only for 3.3V mixed-signal systems where voltage scaling and lower power outweigh termination convenience. |
Compared with SN74ABT2244DBR and 74LVT2244PW, the 74ABT2244CSC uniquely combines 5V operation, built-in 25Ω termination, and SOIC-20 mechanical compatibility-making it optimal for industrial control and legacy 5V bus upgrades where layout stability and signal integrity are prioritized over footprint reduction.
Availability
74ABT2244CSC is available at Aetrix Electronics and suitable for memory subsystems, industrial backplane interfaces, clock distribution networks, and legacy TTL-to-CMOS bridging applications requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT2244CSC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in analog and mixed-signal ICs, power management, and logic devices before its acquisition by ON Semiconductor in 2016.
The 74ABT2244CSC belongs to Fairchild's ABT (Advanced BiCMOS Technology) logic family, engineered for high-speed, low-noise 5V bus interface applications with enhanced drive strength and signal integrity features.
FAQ
What is the operating voltage range for the 74ABT2244CSC?
The 74ABT2244CSC operates within a recommended supply voltage range of +4.5V to +5.5V. This ensures full compliance with TTL logic thresholds and guarantees specified AC/DC performance across the industrial temperature range (–40°C to +85°C). Operation outside this range may result in undefined behavior or reduced reliability.
Does the 74ABT2244CSC require external series termination resistors?
No, the 74ABT2244CSC integrates 25Ω series resistors in each output, eliminating the need for external termination components. This feature reduces PCB component count, simplifies layout, and improves signal integrity on transmission lines with characteristic impedance near 50Ω, such as standard FR-4 traces.
How does the 74ABT2244CSC handle power-up and power-down sequencing?
The 74ABT2244CSC maintains high-impedance outputs throughout the entire power-up and power-down cycle, preventing bus contention and glitches. This behavior is guaranteed across –55°C to +125°C junction temperature and is enabled by internal circuitry that overrides output drivers until VCC stabilizes.
What is the maximum output drive capability of the 74ABT2244CSC?
The 74ABT2244CSC delivers –32mA sink current (IOL) and +15mA source current (IOH) per output under specified conditions. This drive strength supports direct interfacing with multiple CMOS inputs or lightly loaded transmission lines without intermediate buffering, making it suitable for dense memory and address bus applications.
Is the 74ABT2244CSC compatible with hot-swap systems?
Yes, the 74ABT2244CSC supports nondestructive hot insertion. Its input and output structures are designed to withstand live connection to powered backplanes without latchup or permanent damage, provided voltage and current limits per Absolute Maximum Ratings are not exceeded during insertion.
74ABT2244CSC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 15mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
74ABT2244CSC FAQ
1.How can I place an order for 74ABT2244CSC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT2244CSC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 74ABT2244CSC reliable?
The price and inventory of 74ABT2244CSC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT2244CSC is usually 5 days.
3.What payment methods are accepted for 74ABT2244CSC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT2244CSC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT2244CSC?
74ABT2244CSC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT2244CSC order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 74ABT2244CSC?
For technical support, including 74ABT2244CSC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT2244CSC requirements.
6.How does Aetrix verify that 74ABT2244CSC is sourced from the original manufacturer or authorized distributors?
All 74ABT2244CSC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74ABT2244CSC meets industry standards.
7.What is the process for return or replacement of 74ABT2244CSC?
All 74ABT2244CSC units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT2244CSC, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 74ABT2244CSC part is unused and in its original packaging.
Return procedure for 74ABT2244CSC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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