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onsemi 74ABT2244CSJX
- Part No.:
- 74ABT2244CSJX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74ABT2244CSJX.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,715
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Product details
Overview
74ABT2244CSJX 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 supply, delivers 32mA output drive (IOH), supports 3-state outputs via dual active-low OE inputs, and achieves propagation delays as low as 1.0ns.
For engineers reviewing the 74ABT2244CSJX datasheet, pinout, applications, or equivalent options, key selection considerations include its guaranteed latchup protection, hot-insertion capability, glitch-free high-impedance behavior during power sequencing, and elimination of external termination resistors due to on-die 25Ω series resistors.
Technical Context
The 74ABT2244CSJX 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 ABT logic family ensures TTL-compatible input thresholds (VIH = 2.0V, VIL = 0.8V) and fast AC performance across –40°C to +85°C.
Each output integrates a 25Ω series resistor to dampen signal reflections on transmission lines, reducing ringing without requiring external components. The device maintains high-impedance bus loading integrity during full power-up/down cycles and supports nondestructive hot insertion into live backplanes.
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 under rail variation. |
| Propagation Delay (tPLH/tPHL) | 1.0ns min / 3.9ns max - Enables high-speed data routing in memory and address buses with tight timing budgets. |
| Output Drive (IOH/IOL) | –32mA / +15mA - Sufficient to directly drive multiple CMOS inputs or moderate PCB trace capacitance without buffering. |
| Input Thresholds (VIH/VIL) | 2.0V / 0.8V - Guarantees robust noise margin and interoperability with legacy TTL and mixed-voltage logic interfaces. |
| Output Series Resistance | 25Ω - Integrated on-die termination eliminates need for external resistors and reduces board space and BOM count. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications with ambient thermal cycling. |
| Power Supply Current (ICCL) | 30mA max - Reflects worst-case dynamic current draw when all outputs are actively sinking load current. |
Pinout & Package
74ABT2244CSJX is housed in a 20-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide (Package Number M20D), with gull-wing leads and standard JEDEC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | I0–I7 Inputs | Eight asynchronous data inputs; grouped as I0–I3 (pins 1–4) and I4–I7 (pins 5–8); TTL-compatible voltage thresholds. |
| 9, 19 | OE1, OE2 | Active-low output enables; independently control 4-bit groups O0–O3 (OE1) and O4–O7 (OE2) into high-impedance state. |
| 11, 12, 13, 14, 15, 16, 17, 18 | O0–O7 Outputs | Eight non-inverting buffered outputs, each with integrated 25Ω series resistor for controlled impedance drive. |
| 10 | GND | Ground reference for all logic and power domains; must be low-inductance connection for signal integrity. |
| 20 | VCC | +4.5V to +5.5V supply rail; requires local decoupling (e.g., 0.1µF ceramic) near pin for AC noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25Ω output series resistors | Eliminates external termination components, reduces PCB layout complexity, and suppresses signal ringing on transmission lines. |
| Guaranteed latchup protection | Withstands >300mA latchup current per JEDEC JESD78, ensuring reliability in noisy or transient-prone environments. |
| Glitch-free 3-state during power sequencing | Maintains high-impedance outputs across full VCC ramp-up/down, preventing bus contention in hot-swap or power-managed systems. |
| Nondestructive hot-insertion capability | Allows safe insertion into powered-backplane systems without damaging the device or disturbing connected circuitry. |
| TTL-compatible input thresholds | VIH = 2.0V and VIL = 0.8V ensure interoperability with legacy 5V logic families without level-shifting circuitry. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing fan-out and signal integrity enhancement with built-in termination. Use Value: Eliminates external 25Ω resistors per line, reduces trace reflection-induced setup/hold violations, and simplifies layout for dense memory subsystems. |
Use Scenario: Isolating and strengthening bidirectional data bus signals between processor and peripheral ICs. IC Role / Device Role / Timing Role: 3-state line driver enabling controlled bus arbitration via OE1/OE2 for half-duplex communication paths. Use Value: Dual OE control allows independent gating of upper/lower nibbles, supporting partial bus access while maintaining signal integrity at up to 250MHz effective toggle rate. |
| High-Speed Clock Distribution | Legacy System Bus Expansion |
|
Use Scenario: Distributing a system clock to multiple synchronous peripherals with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, low-propagation-delay buffer with controlled-output impedance for clean edge delivery. Use Value: 1.0ns minimum tPLH/tPHL and integrated 25Ω resistors minimize jitter accumulation and overshoot on clock nets. |
Use Scenario: Extending ISA or similar parallel bus segments in industrial control backplanes with added load capacitance. IC Role / Device Role / Timing Role: Octal driver reinforcing signal strength and slew control across long traces or multi-drop stubs. Use Value: 32mA IOH and hot-insertion support allow modular board replacement without powering down the entire chassis. |
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 version in TSSOP-20 (MTC20); identical AC/DC specs but slightly higher ICCZ (60µA vs 50µA). | Same functional behavior and pinout; differs only in package dimensions (4.4mm vs 5.3mm width) and thermal resistance. | Select SN74ABT2244DBR only if TSSOP footprint and tighter board area constraints are required. |
| 74LVT2244PW,118 | NXP LVT variant; operates at 2.7V–3.6V supply, lower drive (–24mA/16mA), no integrated 25Ω resistors. | Requires external termination; suited for 3.3V systems where 5V tolerance and on-die termination are not needed. | Choose 74LVT2244PW,118 only for 3.3V-only designs with separate termination strategy and lower power budget. |
Compared with SN74ABT2244DBR and 74LVT2244PW,118, the 74ABT2244CSJX uniquely combines 5V operation, integrated 25Ω termination, and EIAJ SOP-20 mechanical compatibility-making it optimal for industrial backplane upgrades requiring drop-in 5V bus reinforcement without layout revision.
Availability
74ABT2244CSJX is available at Aetrix Electronics and suitable for memory subsystem design, industrial backplane expansion, and high-speed clock distribution requiring stable component supply and long-term industrial lifecycle support.
Supply support for 74ABT2244CSJX 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, acquired by ON Semiconductor in 2016; its ABT logic family remains widely deployed in industrial and computing infrastructure.
The 74ABT2244CSJX belongs to Fairchild's Advanced BiCMOS Technology (ABT) logic series, engineered for high-speed, low-noise 5V bus interfacing with enhanced robustness in electrically noisy or thermally demanding environments.
FAQ
What is the operating voltage range for the 74ABT2244CSJX?
The 74ABT2244CSJX operates over a supply voltage range of +4.5V to +5.5V. This range ensures compatibility with standard 5V TTL and CMOS systems while accommodating typical rail tolerances. Operation outside this range may cause undefined behavior or damage, as specified in the Absolute Maximum Ratings table where VCC must not exceed +7.0V.
Does the 74ABT2244CSJX require external termination resistors?
No, the 74ABT2244CSJX does not require external termination resistors because it integrates 25Ω series resistors within each output driver. These on-die resistors suppress signal ringing and improve signal integrity on PCB traces, eliminating the need for discrete 25Ω components and reducing BOM count and layout complexity.
How is output enable configured on the 74ABT2244CSJX?
The 74ABT2244CSJX uses two independent active-low output enable inputs: OE1 controls outputs O0–O3, and OE2 controls outputs O4–O7. When either OE pin is driven LOW, its corresponding four outputs become active and follow their respective inputs; when HIGH, those outputs enter high-impedance (3-state) mode. This allows flexible bus segmentation and partial enable control.
What package type is used for the 74ABT2244CSJX?
The 74ABT2244CSJX uses a 20-lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide (Package Number M20D). It features gull-wing leads, standard JEDEC footprint compatibility, and is distinct from SOIC (M20B), SSOP (MSA20), and TSSOP (MTC20) variants of the same device family.
Is the 74ABT2244CSJX suitable for hot-swap applications?
Yes, the 74ABT2244CSJX supports nondestructive hot insertion, meaning it can be safely inserted into a live backplane without damaging itself or connected circuitry. This capability is enabled by its robust input clamp structure, guaranteed latchup protection (>300mA), and glitch-free 3-state behavior during power transitions.
74ABT2244CSJX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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-SOP
74ABT2244CSJX FAQ
1.How can I place an order for 74ABT2244CSJX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT2244CSJX 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 74ABT2244CSJX reliable?
The price and inventory of 74ABT2244CSJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT2244CSJX is usually 5 days.
3.What payment methods are accepted for 74ABT2244CSJX?
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4.How is shipping managed for 74ABT2244CSJX?
74ABT2244CSJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT2244CSJX 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 74ABT2244CSJX?
For technical support, including 74ABT2244CSJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT2244CSJX requirements.
6.How does Aetrix verify that 74ABT2244CSJX is sourced from the original manufacturer or authorized distributors?
All 74ABT2244CSJX 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 74ABT2244CSJX meets industry standards.
7.What is the process for return or replacement of 74ABT2244CSJX?
All 74ABT2244CSJX units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT2244CSJX, 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 74ABT2244CSJX part is unused and in its original packaging.
Return procedure for 74ABT2244CSJX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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