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onsemi 74ABT2244CSCX
- Part No.:
- 74ABT2244CSCX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT2244CSCX.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,399
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Product details
Overview
74ABT2244CSCX 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 sink current per output, supports 3-state outputs via dual active-low enables (OE1/OE2), and achieves propagation delays as low as 1.0ns at 25°C.
For engineers reviewing the 74ABT2244CSCX datasheet, pinout, applications, or equivalent options, key selection criteria include its guaranteed latchup protection, hot-insertion capability, high-impedance glitch-free power-up/down behavior, and elimination of external termination resistors due to on-die 25Ω series resistors.
Technical Context
The 74ABT2244CSCX implements two independent 4-bit groups (I0–I3/O0–O3 controlled by OE1; I4–I7/O4–O7 controlled by OE2), each with non-inverting logic and 3-state output control. Its ABT (Advanced BiCMOS Technology) architecture combines bipolar speed with CMOS input characteristics and TTL-compatible voltage thresholds (VIH = 2.0V, VIL = 0.8V).
Each output integrates a 25Ω series resistor to dampen signal reflections on transmission lines - eliminating discrete termination components while maintaining signal integrity across PCB traces and backplanes. The device meets JEDEC J-STD-020B Pb-free requirements and supports industrial temperature range (–40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | +4.5V to +5.5V - ensures compatibility with standard 5V TTL/CMOS systems without level-shifting. |
| Output Drive Strength | IOH = –32mA / IOL = 15mA - sufficient to drive heavy capacitive loads (e.g., >100pF buses) without external buffers. |
| Propagation Delay | tPLH/tPHL ≤ 3.9ns (max, –40°C to +85°C) - enables reliable operation in high-speed address/data paths up to ~200MHz. |
| Input Thresholds | VIH = 2.0V, VIL = 0.8V - guarantees robust noise margin and interoperability with legacy TTL and LVTTL logic families. |
| Output Series Resistance | 25Ω (integrated) - suppresses ringing on unterminated lines, reducing EMI and eliminating need for external 22–33Ω resistors. |
| 3-State Enable Timing | tPZH/tPZL ≤ 6.0ns, tPHZ/tPLZ ≤ 5.8ns - ensures fast, glitch-free bus arbitration during dynamic enable/disable transitions. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control, instrumentation, and telecom infrastructure applications. |
Pinout & Package
74ABT2244CSCX is packaged in a 20-lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" wide (Package Number M20B). This surface-mount package measures 12.8mm × 7.5mm × 2.35mm and is RoHS-compliant and Pb-free per JEDEC J-STD-020B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | I0–I7 (Data Inputs) | Non-inverting digital inputs accepting TTL/CMOS-compatible logic levels; high-impedance when powered down. |
| 9, 19 | OE1, OE2 (Active-Low Enables) | Independent 4-bit group controls: OE1 enables O0–O3; OE2 enables O4–O7; both must be LOW for output drive. |
| 11, 12, 13, 14, 15, 16, 17, 18 | O0–O7 (Outputs) | Buffered, 3-state outputs with integrated 25Ω series resistors; enter high-impedance state when respective OE is HIGH. |
| 10 | GND | Ground reference for all internal circuitry and I/O terminals. |
| 20 | VCC | Positive supply rail (4.5V–5.5V); powers internal logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25Ω Output Resistors | Eliminates need for eight external series termination resistors, reducing BOM count, PCB area, and layout complexity. |
| Latchup Protection | Guaranteed per JEDEC JESD78; withstands ≥300mA latchup current, enabling robust operation in noisy industrial environments. |
| Glitch-Free Power Sequencing | Maintains high-impedance outputs during full power-up/down cycle, preventing bus contention and data corruption. |
| Hot-Insertion Capability | Nondestructive operation when inserted into live backplanes or hot-swap slots - no damage to device or system. |
| TTL-Compatible Input Thresholds | VIH = 2.0V / VIL = 0.8V ensures seamless interface with legacy 5V microcontrollers, FPGAs, and ASICs. |
Applications
| Memory Address Buffering | Backplane Bus Driver |
|---|---|
|
Use Scenario: Driving address lines to multiple SRAM or Flash devices on a shared memory bus with trace lengths >5 cm. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing low-skew, terminated drive to minimize reflections and timing jitter. Use Value: Integrated 25Ω resistors eliminate discrete terminations, reducing layout risk and ensuring stable setup/hold margins across temperature. |
Use Scenario: Interfacing a microcontroller's parallel data bus to a multi-slot VME or CompactPCI backplane. IC Role / Device Role / Timing Role: 3-state line driver enabling bidirectional bus arbitration with fast enable/disable timing (≤6.0ns). Use Value: Dual OE pins allow independent control of upper/lower byte groups, simplifying bus partitioning and reducing contention windows. |
| Legacy System Interface Adapter | Industrial Control I/O Expansion |
|
Use Scenario: Bridging modern FPGA I/O (3.3V tolerant) to legacy 5V TTL peripherals such as EPROM programmers or test equipment. IC Role / Device Role / Timing Role: Level-tolerant buffer with 5V supply and TTL-compatible thresholds, supporting mixed-voltage system integration. Use Value: Guaranteed VIH/VIL margins and latchup immunity ensure long-term reliability in field-deployed upgrade modules. |
Use Scenario: Expanding GPIO count on PLC mainboards where outputs drive relay coils, optocouplers, or LED indicators. IC Role / Device Role / Timing Role: High-current (15mA sink) buffer stage isolating MCU pins from inductive load transients. Use Value: Glitch-free power-up behavior prevents spurious relay activation during cold start or brown-out recovery. |
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 |
|---|---|---|---|
| SN74ABT2244N | Same ABT family, PDIP-20 package; lacks Pb-free compliance and SOIC footprint. | Preferred for through-hole prototyping or legacy repair; not suitable for automated SMT assembly. | Select when manual soldering or socket-based testing is required; verify thermal derating for continuous 32mA loads. |
| 74LVC244APW | 3.3V-only operation (1.65V–3.6V), lower drive (24mA), no integrated series resistors. | Targets low-power, mixed-voltage systems; requires external termination for signal integrity above 50MHz. | Choose for battery-powered or ultra-low-power designs where 5V operation is unnecessary and board space permits discrete resistors. |
Compared with SN74ABT2244N and 74LVC244APW, the 74ABT2244CSCX uniquely combines 5V operation, integrated 25Ω termination, Pb-free SOIC packaging, and industrial temperature rating - making it optimal for new 5V industrial bus and memory interface designs requiring zero-layout overhead for signal integrity.
Availability
74ABT2244CSCX is available at Aetrix Electronics and suitable for memory subsystem buffering, backplane bus interfacing, and industrial I/O expansion requiring stable component supply, long-lifecycle support, and consistent parametric performance across temperature extremes.
Supply support for 74ABT2244CSCX 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, discrete, and logic ICs before its acquisition by ON Semiconductor in 2016; its ABT logic family remains widely deployed in industrial and telecom infrastructure.
The 74ABT2244CSCX belongs to Fairchild's Advanced BiCMOS Technology (ABT) logic series, engineered for high-speed, low-noise 5V bus interface applications where signal integrity, latchup immunity, and hot-swap resilience are critical.
FAQ
What is the maximum output current specification for 74ABT2244CSCX?
The 74ABT2244CSCX specifies IOL = 15mA (min) per output in the LOW state at VOL ≤ 0.8V, and IOH = –32mA (min) in the HIGH state at VOH ≥ 2.0V. These values are guaranteed over the full operating temperature range (–40°C to +85°C) and ensure reliable drive into typical 50Ω–100Ω transmission lines or fan-out loads. Exceeding these limits may degrade timing or cause thermal stress.
Does 74ABT2244CSCX require external termination resistors?
No - the 74ABT2244CSCX integrates 25Ω series resistors in each of its eight outputs, explicitly designed to reduce ringing and match common PCB trace impedances without external components. This eliminates the need for eight discrete 22Ω–33Ω resistors, simplifying layout and improving signal fidelity on unterminated lines up to ~10 cm.
What is the function of OE1 and OE2 on 74ABT2244CSCX?
OE1 and OE2 are independent active-low output enable inputs: OE1 controls outputs O0–O3, and OE2 controls O4–O7. When either enable is HIGH, its corresponding four outputs enter high-impedance (3-state) mode; both must be LOW for normal buffered output operation. This allows flexible byte-level bus partitioning and reduces contention in multi-master systems.
Is 74ABT2244CSCX compatible with 3.3V logic inputs?
Yes - the 74ABT2244CSCX accepts VIH = 2.0V minimum, so standard 3.3V CMOS outputs (VOH ≥ 2.4V) fully satisfy its HIGH input threshold. However, it operates only from a 4.5V–5.5V VCC supply and does not support 3.3V supply operation. Its inputs are 5V-tolerant but not 3.3V-supplied.
What package type is used for 74ABT2244CSCX?
The 74ABT2244CSCX uses a 20-lead Small Outline Integrated Circuit (SOIC) package, JEDEC MS-013 compliant, 0.300" wide (Package Number M20B). It measures 12.8mm × 7.5mm × 2.35mm, features gull-wing leads, and is Pb-free per JEDEC J-STD-020B - suitable for reflow soldering and automated SMT assembly.
74ABT2244CSCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
74ABT2244CSCX FAQ
1.How can I place an order for 74ABT2244CSCX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT2244CSCX 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 74ABT2244CSCX reliable?
The price and inventory of 74ABT2244CSCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT2244CSCX is usually 5 days.
3.What payment methods are accepted for 74ABT2244CSCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT2244CSCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT2244CSCX?
74ABT2244CSCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT2244CSCX 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 74ABT2244CSCX?
For technical support, including 74ABT2244CSCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT2244CSCX requirements.
6.How does Aetrix verify that 74ABT2244CSCX is sourced from the original manufacturer or authorized distributors?
All 74ABT2244CSCX 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 74ABT2244CSCX meets industry standards.
7.What is the process for return or replacement of 74ABT2244CSCX?
All 74ABT2244CSCX units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT2244CSCX, 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 74ABT2244CSCX part is unused and in its original packaging.
Return procedure for 74ABT2244CSCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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