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NXP Semiconductors 74ABT2244DB,118
- Part No.:
- 74ABT2244DB,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT2244DB,118.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,405
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Product details
Overview
74ABT2244DB,118 from NXP Semiconductors (formerly Philips) is an octal 3-State buffer/line driver with integrated 30Ω series output termination resistors, designed for high-speed bus driving in memory address, clock, and data bus applications. It features dual independent output enables (1OE, 2OE), ±32mA sink/source drive capability, and operates across –40°C to +85°C at 4.5–5.5V supply.
For engineers reviewing the 74ABT2244DB,118 datasheet, 74ABT2244DB,118 pinout, 74ABT2244DB,118 application, or 74ABT2244DB,118 equivalent, key selection criteria include its on-die 30Ω series termination eliminating external resistors, live insertion/extraction support, and BiCMOS low-noise, high-speed performance in TSSOP20 packaging.
Technical Context
The 74ABT2244DB,118 implements a dual-gated octal buffer architecture with two independent 3-State control inputs (1OE, 2OE), each enabling four outputs. Its BiCMOS process delivers propagation delays as low as 2.8 ns (tPLH) and 3.9 ns (tPHL) at 5V with 50pF load.
All eight outputs integrate matched 30Ω series resistors in both high and low states-reducing transmission-line reflections without requiring PCB-level termination. Inputs are fully disabled during 3-State mode, and power-up 3-State behavior prevents bus contention at power-on.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5V TTL/CMOS systems and noise margin compliance. |
| Propagation Delay | 2.8 ns (tPLH), 3.9 ns (tPHL) - Enables reliable operation in high-speed address/data buses up to ~200 MHz. |
| Output Drive | –32 mA (IOH), +12 mA (IOL) - Supports direct connection to multiple TTL loads or stub-loaded transmission lines. |
| Input Capacitance | 4 pF - Minimizes loading on upstream drivers and preserves signal edge integrity. |
| Termination Resistance | 30 Ω series per output - Eliminates need for discrete 33Ω–39Ω surface-mount resistors on PCB traces. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications. |
| ESD Protection | 2000 V HBM, 200 V MM - Provides robust handling during assembly and board-level integration. |
Pinout & Package
74ABT2244DB,118 is housed in a 20-lead plastic TSSOP (Thin Shrink Small Outline Package), Type I, body width 4.4 mm (SOT360-1), with 0.65 mm lead pitch and exposed pad not present. Pin 1 is marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls for Group 1 (pins 12–17) and Group 2 (pins 3–9) outputs respectively. |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first quad buffer group; routed to outputs 1Y0–1Y3 when 1OE = L. |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second quad buffer group; routed to outputs 2Y0–2Y3 when 2OE = L. |
| 12, 14, 16, 18 | 1Y0–1Y3 | 3-State outputs with integrated 30Ω series resistor; driven by 1A0–1A3 when 1OE = L. |
| 3, 5, 7, 9 | 2Y0–2Y3 | 3-State outputs with integrated 30Ω series resistor; driven by 2A0–2A3 when 2OE = L. |
| 10 | GND | Ground reference for all internal circuitry and output termination network. |
| 20 | VCC | +5V supply rail powering BiCMOS output stages and input buffers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30Ω series termination | Eliminates external resistors on all eight outputs, reducing BOM count and PCB area while improving signal integrity on controlled-impedance traces. |
| Dual independent 3-State enables | Allows selective isolation of two separate 4-bit data paths (e.g., upper/lower byte lanes) without shared control logic overhead. |
| Live insertion/extraction support | Enables hot-swap capability in backplane or modular systems where boards may be inserted/removed under power. |
| Power-up 3-State | Guarantees all outputs remain in high-impedance state until VCC stabilizes, preventing bus conflicts during power sequencing. |
| Latch-up immunity | Exceeds 500 mA per JEDEC Std 17, ensuring robustness against transient overcurrent events in noisy industrial environments. |
Applications
| Memory Address Buffering | PCI Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving multiplexed address lines from a microcontroller to SRAM or Flash memory arrays with trace lengths >5 cm. IC Role / Device Role / Timing Role: Octal buffer providing impedance-matched, low-skew address distribution with built-in termination. Use Value: Reduces ringing and overshoot on address bus, enabling stable 25–33 MHz access timing without layout-level termination components. |
Use Scenario: Interfacing a 32-bit PCI controller to peripheral slots requiring level-shifted, isolated data path control. IC Role / Device Role / Timing Role: Dual-group 3-State line driver managing bidirectional D[31:0] segments with independent enable control per byte lane. Use Value: Enables clean bus arbitration via separate 1OE/2OE signals, while 30Ω termination suppresses reflections on unterminated PCI stubs. |
| Backplane Clock Distribution | Industrial PLC I/O Expansion Module |
|
Use Scenario: Distributing a 20 MHz system clock to multiple daughter cards across a 15 cm backplane trace. IC Role / Device Role / Timing Role: Low-jitter clock buffer with series-terminated outputs minimizing edge distortion on parallel routing. Use Value: Maintains <100 ps edge monotonicity and <50 mV overshoot across all eight fanout paths, meeting PCI clock skew requirements. |
Use Scenario: Isolating digital I/O signals between a main PLC CPU and remote expansion modules connected via ribbon cable. IC Role / Device Role / Timing Role: Robust octal driver supporting live insertion of I/O modules while suppressing EMI from long cable runs. Use Value: 2000 V HBM ESD rating and latch-up immunity ensure reliability in factory-floor environments with frequent module swaps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-State buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT244N | Same functional logic and 30Ω termination, but in 20-pin PDIP (SOT146-1); no thermal performance equivalence to TSSOP. | Preferred for through-hole prototyping or legacy board rework; unsuitable for space-constrained SMT designs. | Select SN74ABT244N only when DIP footprint and manual assembly are required; 74ABT2244DB,118 offers superior thermal dissipation and density. |
| 74LVT244PW | 3.3V-only operation (2.7–3.6V), lower drive (–32/+64 mA), no integrated termination; requires external 33Ω resistors. | Targeted at low-voltage mixed-signal systems; incompatible with 5V bus domains without level translation. | Choose 74LVT244PW only for 3.3V-native designs with strict power budgets; 74ABT2244DB,118 remains optimal for 5V industrial buses with termination integration. |
Compared with SN74ABT244N and 74LVT244PW, the 74ABT2244DB,118 uniquely combines 5V operation, integrated 30Ω termination, TSSOP packaging, and industrial temperature range-making it the only option that eliminates both external resistors and PCB real estate for termination in high-reliability 5V bus systems.
Availability
74ABT2244DB,118 is available at Aetrix Electronics and suitable for memory subsystem design, industrial backplane interconnect, and programmable logic controller I/O expansion requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT2244DB,118 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
NXP Semiconductors is a global semiconductor leader delivering high-performance analog, logic, and interface solutions rooted in Philips' legacy of industrial and automotive IC innovation.
The 74ABT2244DB,118 belongs to the ABT (Advanced BiCMOS Technology) logic family-designed specifically for high-speed, low-noise 5V bus interfacing in industrial computing and communications infrastructure.
FAQ
What is the function of the 30Ω series resistors in the 74ABT2244DB,118?
The 30Ω series resistors are integrated into each of the eight outputs of the 74ABT2244DB,118 and are active in both high and low output states. They provide source termination for controlled-impedance transmission lines, reducing signal reflections and overshoot without requiring external resistors. This feature directly supports clean signal integrity in memory address, clock, and data bus applications up to 200 MHz.
Does the 74ABT2244DB,118 support live insertion or hot-swap operation?
Yes, the 74ABT2244DB,118 explicitly supports live insertion and extraction as stated in its official Philips product specification. Its BiCMOS architecture, combined with input disable during 3-State mode and robust ESD/latch-up protection, ensures safe operation when plugged into or removed from a powered backplane or modular system-critical for industrial PLC and telecom shelf applications.
What is the difference between 74ABT2244DB,118 and 74ABT244-1?
The 74ABT2244DB,118 is functionally identical to the 74ABT244-1, as confirmed in the Philips datasheet: "The 74ABT2244 is the same as the 74ABT244-1. The part number has been changed to reflect industry standards." Both share identical pinout, electrical specs, and internal architecture-the '2244' designation aligns with JEDEC-compliant naming conventions for octal buffers with dual enables.
Can the 74ABT2244DB,118 operate at 3.3V supply voltage?
No, the 74ABT2244DB,118 is specified only for 4.5V to 5.5V operation per its Recommended Operating Conditions table. Attempting to power it at 3.3V will result in undefined logic behavior, insufficient output drive, and potential failure to meet AC timing specifications. For 3.3V systems, consider the 74LVT244 or 74ALVC244 families instead.
How does the power-up 3-State behavior of the 74ABT2244DB,118 prevent bus contention?
The 74ABT2244DB,118 guarantees all eight outputs remain in high-impedance (Z) state during power-up until VCC reaches a valid operating threshold. This eliminates risk of short-circuit current or data corruption when multiple devices share a common bus, especially in systems with asynchronous power sequencing. The feature is intrinsic to its BiCMOS design and requires no external reset circuitry.
74ABT2244DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (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, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
74ABT2244DB,118 FAQ
1.How can I place an order for 74ABT2244DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT2244DB,118 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 74ABT2244DB,118 reliable?
The price and inventory of 74ABT2244DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT2244DB,118 is usually 5 days.
3.What payment methods are accepted for 74ABT2244DB,118?
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4.How is shipping managed for 74ABT2244DB,118?
74ABT2244DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT2244DB,118 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 74ABT2244DB,118?
For technical support, including 74ABT2244DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT2244DB,118 requirements.
6.How does Aetrix verify that 74ABT2244DB,118 is sourced from the original manufacturer or authorized distributors?
All 74ABT2244DB,118 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 74ABT2244DB,118 meets industry standards.
7.What is the process for return or replacement of 74ABT2244DB,118?
All 74ABT2244DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT2244DB,118, 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 74ABT2244DB,118 part is unused and in its original packaging.
Return procedure for 74ABT2244DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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