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NXP Semiconductors 74ABT2244DB,112
- Part No.:
- 74ABT2244DB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT2244DB,112.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,020
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Product details
Overview
74ABT2244DB,112 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 capability, and operates across –40°C to +85°C at 4.5–5.5V supply.
For engineers reviewing the 74ABT2244DB,112 datasheet, 74ABT2244DB,112 pinout, 74ABT2244DB,112 application, or 74ABT2244DB,112 equivalent, key selection criteria include integrated 30Ω termination, dual OE control per four-channel group, live insertion support, and BiCMOS low-noise drive performance in TSSOP20 packaging.
Technical Context
The 74ABT2244DB,112 implements a high-performance BiCMOS architecture delivering low static/dynamic power with sub-4ns propagation delay (tPHL = 3.9 ns typical at CL = 50 pF). Its outputs integrate matched 30Ω series resistance in both logic states-eliminating external termination components and reducing line ringing in parallel bus systems.
Each of the two 4-bit groups (1Y0–1Y3 and 2Y0–2Y3) is independently controlled by dedicated enable inputs (1OE, 2OE), supporting selective bus partitioning. Inputs are disabled during 3-State mode, and power-up 3-State ensures glitch-free initialization without external pull-ups.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5V TTL/CMOS logic rails and noise margin compliance. |
| Propagation Delay | tPHL = 3.9 ns (typ), tPLH = 2.8 ns (typ) at CL = 50 pF - Enables reliable operation in >200 MHz bus environments with tight timing budgets. |
| Output Drive | –32 mA sink / +5 mA source - Supports heavy capacitive loads and fan-out to multiple TTL inputs without external buffers. |
| Integrated Termination | 30 Ω series resistance per output - Eliminates need for discrete 33 Ω resistors on PCB, reducing BOM count and layout area. |
| Input Capacitance | CIN = 4 pF - Minimizes loading on upstream drivers and preserves signal integrity in high-frequency routing. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems including telecom infrastructure and industrial controllers. |
Pinout & Package
74ABT2244DB,112 is housed in a 20-pin plastic TSSOP Type I package (SOT360-1), 4.4 mm body width, lead pitch 0.65 mm, surface-mount compatible with automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls for Group 1 (1Y0–1Y3) and Group 2 (2Y0–2Y3); independent gating allows partial bus isolation. |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first 4-bit channel; driven directly by upstream logic without level-shifting. |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second 4-bit channel; electrically isolated from Group 1 except via shared VCC/GND. |
| 18, 16, 14, 12 | 1Y0–1Y3 | 3-State outputs with integrated 30Ω series resistor; drive terminated lines directly to reduce reflections. |
| 9, 7, 5, 3 | 2Y0–2Y3 | 3-State outputs with identical 30Ω series termination; match Group 1 for balanced bus loading. |
| 10 | GND | Signal ground reference for all I/O and internal circuitry; requires low-inductance connection to system ground plane. |
| 20 | VCC | +5V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm for stable high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Live insertion/extraction support | Enables hot-swap capability in backplane and modular systems without damaging the device or host board. |
| Power-up 3-State | Outputs remain in high-impedance state until VCC stabilizes above 2.1 V, preventing bus contention during power sequencing. |
| Latch-up immunity | Exceeds 500 mA per JEDEC Std 17 - withstands transient overcurrent events common in noisy industrial environments. |
| ESD protection | 2000 V HBM (MIL-STD-883 Method 3015), 200 V machine model - reduces handling sensitivity and field failure risk. |
| BiCMOS process | Combines bipolar speed and CMOS low static power - achieves 3.9 ns delay with only 50 µA ICCZ in 3-State mode. |
Applications
| Memory Address Bus Driver | PCI Local Bus Transmitter |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in embedded control systems. IC Role / Device Role / Timing Role: Octal buffer providing terminated, low-skew drive to minimize address setup/hold violations and reduce trace stub reflections. Use Value: Integrated 30Ω termination eliminates eight external resistors, cuts PCB area by ~12 mm², and improves signal fidelity at 33 MHz bus speeds. |
Use Scenario: Transmitting multiplexed AD[31:0] signals from a PCI controller to peripheral slots in industrial PC chassis. IC Role / Device Role / Timing Role: Dual-group 3-State line driver enabling dynamic bus arbitration between master and slave devices. Use Value: Independent 1OE/2OE control allows real-time segmentation of upper/lower address/data byte lanes without added logic gates. |
| High-Speed Clock Distribution | Backplane Data Line Driver |
Use Scenario: Buffering and distributing a 50 MHz system clock to multiple FPGA configuration pins and PLL reference inputs. IC Role / Device Role / Timing Role: Low-jitter, terminated clock repeater minimizing edge degradation across 10+ cm traces. Use Value: Sub-4ns propagation delay matching and 30Ω series termination suppress overshoot/undershoot, maintaining <100 ps jitter budget. |
Use Scenario: Driving parallel data lines (e.g., 8-bit status bus) across a 200 mm backplane in modular test equipment. IC Role / Device Role / Timing Role: Robust line driver with ±32 mA drive strength compensating for 15 pF/inch trace capacitance and connector losses. Use Value: High sink current ensures valid LOW levels even with 100 mA total load, eliminating need for active pull-down networks. |
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 |
|---|---|---|---|
| 74ABT244D,112 | Same die, identical electrical specs and pinout; differs only in part numbering convention (legacy vs. industry-standard suffix). | No functional difference; used interchangeably in legacy designs referencing older Philips documentation. | Select 74ABT244D,112 only when maintaining strict BOM continuity with pre-1998 design revisions. |
| SN74ABT2244DBR | Texas Instruments version; same 20-pin TSSOP package, 30Ω termination, and –32/+5 mA drive, but with tighter AC limits (tPHL ≤ 4.3 ns max vs. 5.3 ns for 74ABT2244DB,112). | Valid for new designs requiring guaranteed worst-case timing margin; not drop-in due to TI's different thermal pad design and moisture sensitivity level. | Choose SN74ABT2244DBR for new industrial designs needing extended qualification history and tighter parametric guarantees. |
Compared with 74ABT2244DB,112, the 74ABT244D,112 offers identical functionality with legacy labeling, while SN74ABT2244DBR provides tighter timing bounds and TI-specific reliability reporting-making it preferable for safety-critical timing paths where worst-case delay must be bounded below 4.5 ns.
Availability
74ABT2244DB,112 is available at Aetrix Electronics and suitable for memory address bus drivers, PCI local bus transmitters, high-speed clock distribution networks, and backplane data line drivers requiring stable component supply and long-term industrial lifecycle support.
Supply support for 74ABT2244DB,112 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 focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering IC development.
The 74ABT2244DB,112 belongs to NXP's ABT-series advanced BiCMOS logic family, engineered specifically for high-speed, low-noise bus interface applications in industrial control and communications infrastructure.
FAQ
What is the function of the 30Ω series termination resistors in the 74ABT2244DB,112?
The 30Ω series termination resistors in the 74ABT2244DB,112 are integrated into each output path (both HIGH and LOW states) to match typical PCB trace impedance and suppress signal reflections. This eliminates the need for external 33Ω resistors, simplifying layout and improving signal integrity on memory address, clock, and data buses operating up to 100 MHz. The 74ABT2244DB,112 achieves this without sacrificing drive strength or propagation delay.
Does the 74ABT2244DB,112 support live insertion in backplane systems?
Yes, the 74ABT2244DB,112 supports live insertion and extraction per its datasheet specification. Its inputs are disabled during 3-State mode, and the device includes latch-up protection exceeding 500 mA per JEDEC Std 17. These features allow safe hot-plug operation in modular backplane systems without disrupting bus activity on adjacent slots. The 74ABT2244DB,112 maintains this capability across its full –40°C to +85°C operating range.
What is the maximum output current rating for the 74ABT2244DB,112?
The 74ABT2244DB,112 is rated for –32 mA output sink current (IOL) and +5 mA output source current (IOH) under recommended operating conditions (VCC = 4.5–5.5 V, Tamb = –40°C to +85°C). This asymmetric drive supports TTL-compatible loads and ensures robust LOW-level signaling even under heavy capacitive or fan-out conditions. The 74ABT2244DB,112 maintains these ratings without thermal derating up to +85°C ambient.
How does the dual output enable (1OE/2OE) architecture benefit system design?
The dual output enable (1OE and 2OE) architecture in the 74ABT2244DB,112 allows independent control of two 4-bit output groups (1Y0–1Y3 and 2Y0–2Y3), enabling selective bus partitioning and dynamic resource allocation. This eliminates the need for additional logic gates to gate subsets of signals and supports time-multiplexed bus sharing in multi-master systems. The 74ABT2244DB,112 uses active-low enables compatible with standard microcontroller GPIOs and CPLD control outputs.
Is the 74ABT2244DB,112 pin-compatible with other ABT-series octal buffers?
The 74ABT2244DB,112 is pin-compatible with the 74ABT244D,112 (same die, identical pinout and function) but not with non-ABT variants like 74ACT244 or 74LVT244 due to differences in termination, drive strength, and enable polarity. Its 20-pin TSSOP (SOT360-1) footprint matches industry-standard spacing, but mechanical compatibility with other 20-lead TSSOP packages depends on exact body width and lead form-always verify land pattern against NXP's SOT360-1 drawing before layout. The 74ABT2244DB,112 requires no PCB changes when replacing 74ABT244D,112.
74ABT2244DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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, 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,112 FAQ
1.How can I place an order for 74ABT2244DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT2244DB,112 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,112 reliable?
The price and inventory of 74ABT2244DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT2244DB,112 is usually 5 days.
3.What payment methods are accepted for 74ABT2244DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT2244DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT2244DB,112?
74ABT2244DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT2244DB,112 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,112?
For technical support, including 74ABT2244DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT2244DB,112 requirements.
6.How does Aetrix verify that 74ABT2244DB,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT2244DB,112 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,112 meets industry standards.
7.What is the process for return or replacement of 74ABT2244DB,112?
All 74ABT2244DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT2244DB,112, 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,112 part is unused and in its original packaging.
Return procedure for 74ABT2244DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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