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NXP Semiconductors 74ABT2245DB,112
- Part No.:
- 74ABT2245DB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT2245DB,112.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,139
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Product details
Overview
74ABT2245DB,112 from NXP Semiconductors (formerly Philips) is an octal bidirectional 3-State transceiver with integrated 30 Ω series output termination, non-inverting bus interface, and separate direction (DIR) and output enable (OE) controls. It operates from 4.5 V to 5.5 V, delivers ±32 mA sink/source drive, and supports –40 °C to +85 °C industrial temperature range. Used in memory address/data bus interfacing where controlled signal integrity and hot-swap capability are required.
For engineers reviewing the 74ABT2245DB,112 datasheet, 74ABT2245DB,112 pinout, 74ABT2245DB,112 application, or 74ABT2245DB,112 equivalent, key selection criteria include its on-die 30 Ω series termination eliminating external resistors, power-up 3-State behavior, live insertion support, and compatibility with ABT-family timing and drive specifications.
Technical Context
The 74ABT2245DB,112 implements a dual-rail BiCMOS architecture enabling high-speed propagation (tPLH/tPHL = 3.9 ns typical at 5 V, CL = 50 pF) while maintaining low static current (ICCZ = 50 µA max at 5.5 V). Its DIR-controlled bidirectional data flow allows A-side and B-side I/Os to function as inputs or outputs depending on logic state, with OE asserting high-impedance on both sides simultaneously.
All eight A/B I/O pins integrate matched 30 Ω series resistance in both HIGH and LOW output states-reducing ringing and overshoot on transmission lines without requiring PCB-level termination. Input clamping (VIK = –1.2 V), latch-up immunity (>500 mA), and ESD protection (2000 V HBM, 200 V MM) support robust operation in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS systems and margin for rail variation. |
| Propagation delay | 3.9 ns typical (An↔Bn, CL = 50 pF, VCC = 5 V) - Enables reliable operation in sub-10 ns timing-critical bus transfers. |
| Output drive | +12 mA / –32 mA - Supports driving heavy capacitive loads and fan-out to multiple TTL inputs without buffering. |
| I/O pin capacitance | 7 pF (outputs disabled) - Minimizes switching noise and loading on shared bus segments. |
| Series termination | 30 Ω integrated per output - Eliminates need for discrete 33 Ω resistors, reducing BOM count and layout area. |
| Operating temperature | –40 °C to +85 °C - Qualified for industrial-grade embedded control and instrumentation applications. |
| Input leakage | ±1.0 µA max (control pins, VCC = 5.5 V) - Prevents unintended logic transitions during low-power or floating-bus conditions. |
Pinout & Package
74ABT2245DB,112 is housed in a 20-pin plastic shrink small outline package (SSOP), body width 5.3 mm, JEDEC MO-153 compliant, with 0.65 mm lead pitch and gull-wing leads. Thermal resistance (RθJA) is 120 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: LOW enables A→B data flow; HIGH enables B→A data flow. |
| 2–9 | A0–A7 | Bidirectional I/O pins (A side): Function as inputs or outputs based on DIR and OE state. |
| 10 | GND | Ground reference (0 V) for all internal circuitry and I/O return paths. |
| 11–18 | B7–B0 | Bidirectional I/O pins (B side): Pin order reversed vs. A-side for compact PCB routing (B7=11, B0=18). |
| 19 | OE | Active-LOW output enable: HIGH forces all A/B pins into high-impedance 3-State mode. |
| 20 | VCC | Positive supply (4.5–5.5 V): Powers internal logic and output drivers; decoupling required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30 Ω series termination | Reduces PCB-level signal reflections and eliminates need for eight discrete termination resistors. |
| Power-up 3-State | Outputs remain in high-impedance until VCC stabilizes, preventing bus contention during power sequencing. |
| Live insertion/extraction support | Withstands hot-plug events without latch-up or damage due to robust ESD/latch-up protection. |
| High sink current (–32 mA) | Drives heavy capacitive loads and multiple TTL inputs directly, reducing need for buffer stages. |
| Low input capacitance (4 pF) | Minimizes loading on upstream drivers and preserves signal edge rates across cascaded logic stages. |
Applications
| Memory Address Bus Interface | Backplane Data Transceiver |
|---|---|
Use Scenario: Bidirectional address/data transfer between microcontroller and SRAM or Flash memory in industrial PLCs. IC Role / Device Role / Timing Role: Octal transceiver managing A-side (MCU) and B-side (memory) signals with DIR-controlled flow and OE-gated isolation. Use Value: Integrated 30 Ω termination ensures clean address strobes up to 100 MHz without added PCB components or layout tuning. | Use Scenario: Hot-swappable module communication across a 20-pin backplane in modular test equipment. IC Role / Device Role / Timing Role: Level-shifting and bus-isolation transceiver enabling safe insertion/removal of daughter cards under power. Use Value: Power-up 3-State and live-insertion rating prevent bus glitches or system reset during card replacement. |
| Legacy ISA Bus Extension | Industrial I/O Expansion Hub |
Use Scenario: Extending ISA-compatible control signals (IOR#, IOW#, ADDR[0:7]) between legacy PC host and custom peripheral board. IC Role / Device Role / Timing Role: Direction-controlled bidirectional buffer synchronizing slow peripheral timing with fast CPU bus cycles. Use Value: 3.9 ns propagation delay meets ISA timing budgets while 32 mA sink current drives long trace runs. | Use Scenario: Centralized digital I/O aggregation for sensor/actuator racks in factory automation cabinets. IC Role / Device Role / Timing Role: Isolating field-side B-bus from controller-side A-bus with independent DIR/OE control per channel group. Use Value: Latch-up immunity (>500 mA) and –40 °C to +85 °C rating ensure reliability in electrically noisy, thermally variable enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ABT245D,112 | Same functional spec and pinout; differs only in part numbering convention (74ABT245-1 designation per datasheet). | No functional difference; identical use cases and timing behavior. | Select when sourcing legacy-designated ABT245-1 marked units or matching existing BOMs labeled as 74ABT245. |
| SN74ABT245N | TI version with same 30 Ω termination, but slightly higher ICCZ (100 µA vs. 50 µA) and different AC test conditions. | Valid for new designs where TI supply chain preference applies; verify tPLH/tPHL match (4.2 ns max vs. 5.0 ns) for timing-critical paths. | Choose for TI-aligned procurement or when needing TI's extended temp grade (-40 °C to +125 °C) variants not offered for 74ABT2245DB,112. |
Compared with 74ABT2245DB,112, the 74ABT245D,112 is functionally identical and interchangeable, whereas SN74ABT245N offers equivalent functionality with minor parametric shifts and broader temperature availability-making it suitable for extended-range deployments where NXP's –40 °C to +85 °C limit is insufficient.
Availability
74ABT2245DB,112 is available at Aetrix Electronics and suitable for industrial control systems, legacy bus expansion, memory subsystem interfacing, and hot-pluggable module designs requiring stable component supply and long-term lifecycle support.
Supply support for 74ABT2245DB,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 company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74ABT2245DB,112 belongs to NXP's ABT-series advanced bipolar transistor-transistor logic family, engineered for high-speed, low-noise bidirectional bus interfacing in industrial and computing infrastructure where signal integrity and robustness are critical.
FAQ
What is the function of the DIR pin on the 74ABT2245DB,112?
The DIR (Direction) pin on the 74ABT2245DB,112 controls data flow direction between the A-side (pins 2–9) and B-side (pins 11–18) I/O ports. When DIR is LOW, data passes from A to B; when HIGH, data flows from B to A. This enables flexible bidirectional bus management without external logic, and the 74ABT2245DB,112 maintains non-inverting signal polarity in either direction.
Does the 74ABT2245DB,112 require external termination resistors?
No, the 74ABT2245DB,112 integrates 30 Ω series termination resistors in both HIGH and LOW output states on all A and B I/O pins. This design eliminates the need for external 33 Ω resistors typically used for impedance matching on transmission lines, simplifying PCB layout and reducing component count-confirmed by the datasheet's explicit statement that "external termination resistors [are] unnecessary" for the 74ABT2245DB,112.
What is the maximum operating temperature range for the 74ABT2245DB,112?
74ABT2245DB,112 is rated for operation from –40 °C to +85 °C, as specified in the Recommended Operating Conditions table. This industrial-grade temperature range is validated across all electrical parameters including propagation delay, drive strength, and leakage current, making the 74ABT2245DB,112 suitable for deployment in factory automation, transportation, and outdoor embedded systems.
How does the 74ABT2245DB,112 handle power-up sequencing?
The 74ABT2245DB,112 features power-up 3-State behavior: all outputs remain in high-impedance until VCC reaches a valid operating level, preventing bus contention during power ramp-up. This is intrinsic to the device's BiCMOS design and requires no external reset circuitry-ensuring safe initialization in systems with asynchronous power rails, a key reliability feature of the 74ABT2245DB,112.
Is the 74ABT2245DB,112 pin-compatible with other ABT-series transceivers?
Yes-the 74ABT2245DB,112 shares identical pinout and function with 74ABT245D,112 and 74ABT245N, as confirmed by the datasheet stating "The 74ABT2245 is the same as the 74ABT245-1." All three share the same 20-pin SSOP/SO/TSSOP footprints, DIR/OE control scheme, and I/O mapping-enabling direct substitution in existing layouts without redesign, provided voltage and timing margins align for the specific 74ABT2245DB,112 variant.
74ABT2245DB,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:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- 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
74ABT2245DB,112 FAQ
1.How can I place an order for 74ABT2245DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT2245DB,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 74ABT2245DB,112 reliable?
The price and inventory of 74ABT2245DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT2245DB,112 is usually 5 days.
3.What payment methods are accepted for 74ABT2245DB,112?
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4.How is shipping managed for 74ABT2245DB,112?
74ABT2245DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT2245DB,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 74ABT2245DB,112?
For technical support, including 74ABT2245DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT2245DB,112 requirements.
6.How does Aetrix verify that 74ABT2245DB,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT2245DB,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 74ABT2245DB,112 meets industry standards.
7.What is the process for return or replacement of 74ABT2245DB,112?
All 74ABT2245DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT2245DB,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 74ABT2245DB,112 part is unused and in its original packaging.
Return procedure for 74ABT2245DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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