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NXP Semiconductors 74ABT2245D,112
- Part No.:
- 74ABT2245D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT2245D,112.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,090
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Product details
Overview
74ABT2245D,112 from NXP Semiconductors (formerly Philips) is an octal bidirectional 3-State transceiver with integrated 30 Ω series output termination resistors, non-inverting logic, 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 achieves 3.9 ns typical propagation delay (An↔Bn) at 5 V with 50 pF load - optimized for high-speed bus interface applications including memory address/data buses and clock distribution.
For engineers reviewing the 74ABT2245D,112 datasheet, 74ABT2245D,112 pinout, 74ABT2245D,112 application, or 74ABT2245D,112 equivalent, this device is selected for its integrated 30 Ω series termination (eliminating external resistors), live insertion capability, power-up 3-State behavior, and compatibility with ABT-family timing and drive requirements in industrial and telecom backplane designs.
Technical Context
The 74ABT2245D,112 implements a dual-rail BiCMOS architecture enabling high-speed switching with low dynamic power. Its DIR-controlled bidirectional data flow supports both A→B and B→A transmission paths without inversion, while OE provides synchronous 3-State control across all eight channels.
Each I/O pin integrates matched 30 Ω series resistance in both HIGH and LOW output states, reducing signal reflections and line noise on PCB traces up to 15 cm. The device meets JEDEC Std 17 latch-up immunity (>500 mA) and MIL-STD-833 ESD ratings (>2000 V HBM, >200 V MM), supporting hot-swap operation in modular systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 4.5 V to 5.5 V - ensures compatibility with standard 5 V TTL/CMOS logic rails and margin against supply droop. |
| Propagation delay (tPLH/tPHL) | 3.9 ns typical (CL = 50 pF, VCC = 5 V) - enables ≤250 MHz bus operation with tight timing budgets. |
| Output drive strength | +12 mA / –32 mA - supports driving multiple TTL loads or unterminated stubs in point-to-multipoint topologies. |
| Input capacitance (CIN) | 4 pF (DIR, OE) - minimizes capacitive loading on control lines, preserving setup/hold margins in high-frequency enable sequencing. |
| I/O pin capacitance (CI/O) | 7 pF (outputs disabled) - reduces crosstalk and dynamic current draw during 3-State idle periods. |
| Quiescent supply current (ICCZ) | 50 µA (VCC = 5.5 V, outputs disabled) - enables low-power standby in always-on system management interfaces. |
| Series termination resistance | 30 Ω (integrated per output) - eliminates need for 20–30 Ω discrete series resistors on each trace, simplifying layout and reducing BOM count. |
Pinout & Package
74ABT2245D,112 is housed in a 20-pin plastic small outline (SO) package (SOT163-1), 7.5 mm body width, with standard 1.27 mm pitch and gull-wing leads suitable for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: LOW enables A→B data flow; HIGH enables B→A data flow - allows single-wire bus arbitration without external logic. |
| 2–9 | A0–A7 | Data I/O port A: bidirectional pins with 30 Ω series termination - connect to microcontroller address/data bus or FPGA side A. |
| 10 | GND | Ground reference (0 V) - must be low-inductance connection to minimize ground bounce during simultaneous switching. |
| 11–18 | B7–B0 | Data I/O port B: bidirectional pins with 30 Ω series termination - connect to memory module, peripheral bus, or FPGA side B (note reversed numbering). |
| 19 | OE | Active-LOW output enable: drives all A/B pins into high-impedance state when HIGH - enables bus sharing and hot-plug isolation. |
| 20 | VCC | Positive supply (4.5–5.5 V) - requires local 100 nF ceramic decoupling within 5 mm of pin for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30 Ω series termination | Eliminates eight external resistors per device, reducing PCB area, assembly cost, and impedance mismatch risk on 50–75 Ω traces. |
| Power-up 3-State | Outputs remain in high-impedance state until VCC stabilizes above 2.1 V - prevents bus contention during power sequencing. |
| Live insertion/extraction support | Withstands hot-swap events without latch-up or ESD damage, verified per JEDEC Std 17 and MIL-STD-833. |
| Non-inverting bidirectional transfer | Preserves signal polarity in both directions - avoids need for inverters or software polarity correction in address/data paths. |
| Latch-up immunity >500 mA | Guarantees robustness against transient overcurrent events in noisy industrial environments with shared ground planes. |
Applications
| Memory Address Bus Interface | Backplane Data Transceiver |
|---|---|
Use Scenario: Driving 8-bit address lines from a microcontroller to multiple SRAM or EPROM devices on a shared bus. IC Role / Device Role / Timing Role: Bidirectional address transceiver with DIR-controlled flow and 30 Ω series termination to suppress ringing on 10–15 cm traces. Use Value: Eliminates external termination resistors while maintaining <4 ns propagation delay, enabling reliable 200 MHz address strobe timing. |
Use Scenario: Interfacing two FPGA-based subsystems across a 20 cm backplane with controlled-impedance routing. IC Role / Device Role / Timing Role: Hot-swappable bus buffer providing isolated, direction-controlled data transfer between independent clock domains. Use Value: Power-up 3-State and live insertion capability prevent bus glitches during module replacement; 30 Ω termination reduces inter-symbol interference at 100 Mbps. |
| Legacy ISA Bus Extender | Industrial PLC I/O Expansion |
Use Scenario: Extending a vintage ISA bus to add legacy peripherals using modern PCB layout practices. IC Role / Device Role / Timing Role: Level-shifting and noise-suppressing transceiver between ISA slot and daughterboard, operating at 8 MHz. Use Value: ±32 mA drive strength ensures clean signal edges into 10+ TTL loads; 4 pF DIR/OE inputs preserve setup time under fast edge rates. |
Use Scenario: Isolating programmable logic controller CPU bus from field I/O modules subject to EMI and ground shifts. IC Role / Device Role / Timing Role: Direction-controlled data coupler with high ESD immunity (2000 V HBM) and latch-up protection for harsh factory environments. Use Value: 50 µA ICCZ in 3-State mode minimizes standby power in always-on control cabinets; 7 pF I/O capacitance limits crosstalk between adjacent I/O channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245N | Same ABT family, identical electrical specs and pinout; differs only in package (PDIP-20 vs SO-20) and ordering suffix. | No change in bus timing, drive, or termination - direct substitution where through-hole mounting is required. | Select SN74ABT245N only for legacy PDIP-based prototyping or repair; 74ABT2245D,112 preferred for surface-mount production. |
| 74LVT245PW | Lower 3.3 V supply (2.7–3.6 V), 24 mA drive, no integrated termination - requires external 22–33 Ω resistors per line. | Suitable for mixed-voltage 3.3 V systems but adds 16 passive components and increases propagation delay to ~5.2 ns. | Choose 74LVT245PW only when interfacing to 3.3 V logic; 74ABT2245D,112 remains optimal for 5 V bus integrity and BOM simplification. |
Compared with SN74ABT245N and 74LVT245PW, the 74ABT2245D,112 uniquely combines 5 V operation, integrated 30 Ω termination, and SO-package reliability - delivering lower total system cost and higher signal fidelity in industrial 5 V backplane and memory interface designs.
Availability
74ABT2245D,112 is available at Aetrix Electronics and suitable for memory address buffering, backplane data coupling, and industrial I/O expansion requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for 74ABT2245D,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, formerly Philips Semiconductors, is a global leader in high-performance logic and interface ICs, with deep expertise in automotive, industrial, and communications silicon.
The 74ABT2245D,112 belongs to the ABT-series advanced BiCMOS transceiver family, engineered for high-speed 5 V bus interfacing with integrated signal integrity features - targeting industrial control, telecom infrastructure, and legacy system upgrades.
FAQ
What is the function of the DIR pin on the 74ABT2245D,112?
The DIR (Direction) pin on the 74ABT2245D,112 controls bidirectional data flow: when DIR is LOW, data passes from A-side pins (A0–A7) to B-side pins (B0–B7); when DIR is HIGH, data flows from B-side to A-side. This non-inverting path eliminates polarity inversion, and the pin's 4 pF input capacitance ensures minimal timing impact on direction control signals in high-speed systems using the 74ABT2245D,112.
Does the 74ABT2245D,112 require external termination resistors?
No, the 74ABT2245D,112 integrates 30 Ω series termination resistors in both HIGH and LOW output states on all 16 I/O pins (A0–A7, B0–B7), eliminating the need for external resistors. This design reduces PCB space, BOM count, and impedance mismatch risk - confirmed in the "FEATURES" section and schematic of each output in the official Philips product data for the 74ABT2245D,112.
What is the maximum operating temperature range for the 74ABT2245D,112?
The 74ABT2245D,112 is rated for operation from –40 °C to +85 °C, as specified in the "ORDERING INFORMATION" and "RECOMMENDED OPERATING CONDITIONS" sections of the Philips product data. This industrial temperature range supports deployment in factory automation, telecom equipment, and outdoor embedded systems where ambient thermal stress is present - a key specification of the 74ABT2245D,112.
How does the 74ABT2245D,112 handle power-up sequencing?
The 74ABT2245D,112 features power-up 3-State behavior: outputs remain in high-impedance state until VCC exceeds 2.1 V, preventing bus contention during power ramp-up. This is verified in the "FEATURES" list and "DC ELECTRICAL CHARACTERISTICS" table (IPU/IPD parameter), ensuring safe integration into systems with asynchronous power domains - a critical reliability feature of the 74ABT2245D,112.
Is the 74ABT2245D,112 compatible with live insertion or hot-swap operations?
Yes, the 74ABT2245D,112 supports live insertion and extraction, as explicitly stated in its "FEATURES" list. This capability is enabled by latch-up immunity exceeding 500 mA (per JEDEC Std 17) and ESD protection >2000 V HBM, allowing safe module replacement in powered-backplane systems - a documented operational feature of the 74ABT2245D,112.
74ABT2245D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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-SO
74ABT2245D,112 FAQ
1.How can I place an order for 74ABT2245D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT2245D,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 74ABT2245D,112 reliable?
The price and inventory of 74ABT2245D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT2245D,112 is usually 5 days.
3.What payment methods are accepted for 74ABT2245D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT2245D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT2245D,112?
74ABT2245D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT2245D,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 74ABT2245D,112?
For technical support, including 74ABT2245D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT2245D,112 requirements.
6.How does Aetrix verify that 74ABT2245D,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT2245D,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 74ABT2245D,112 meets industry standards.
7.What is the process for return or replacement of 74ABT2245D,112?
All 74ABT2245D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT2245D,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 74ABT2245D,112 part is unused and in its original packaging.
Return procedure for 74ABT2245D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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