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Texas Instruments SN74ABTR2245PW

Name: SN74ABTR2245PW
Brand: Texas Instruments
SKU: SN74ABTR2245PW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ABTR2245PW

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: SN74ABTR2245PW.pdf

Description:: IC TXRX NON-INVERT 5.5V 20TSSOP

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Product details

Overview

SN74ABTR2245PW from Texas Instruments is an octal transceiver with 3-state outputs, designed for asynchronous bidirectional data bus communication between A and B ports. It features integrated 25-Ω series output resistors, operates from 4.5 V to 5.5 V, supports –40°C to 85°C temperature range, and delivers 12 mA sink/source capability per I/O. It is used in industrial control backplanes and memory interface isolation.

For engineers reviewing the SN74ABTR2245PW datasheet, SN74ABTR2245PW pinout, SN74ABTR2245PW application, or SN74ABTR2245PW equivalent, key selection considerations include direction-control logic behavior, high-impedance state during power sequencing, integrated termination, BiCMOS low-power operation, and TSSOP-20 package compatibility with high-density PCB layouts.

Technical Context

This device implements dual-octet bidirectional data routing controlled by DIR (direction) and OE (output enable) inputs. Its EPIC-II^B BiCMOS process enables fast propagation delays (t_PLH/t_PHL ≤ 4.5 ns at 5 V) while maintaining low ICC (≤ 32 mA active, ≤ 250 µA disabled). The internal 25-Ω series resistor per output eliminates external termination components.

It guarantees high-impedance isolation during power-up/down when V_CC is below 2.1 V, and requires OE tied to V_CC via pullup for guaranteed Hi-Z above that threshold. Latch-up immunity exceeds 500 mA per JESD-17, and ESD protection meets 2000 V HBM and 200 V machine model standards.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS systems without level-shifting.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded and control applications.
Output Drive	±12 mA per channel - sufficient to drive standard TTL loads and stubbed transmission lines.
Propagation Delay	≤ 4.5 ns (t_PHL, t_PLH) - enables reliable operation in high-speed bus timing budgets up to ~100 MHz.
Output Termination	Integrated 25-Ω series resistor - eliminates need for external series resistors, reducing BOM count and layout area.
Power-Down Behavior	Hi-Z state when V_CC < 2.1 V - prevents bus contention during power sequencing without external circuitry.
ESD Rating	2000 V HBM, 200 V MM - meets robustness requirements for handling and board-level integration.

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm footprint, 1.2 mm max height, 0.65 mm pitch, lead-free NIPDAU finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1, 19, 2, 18, 3, 17, 4, 16, 5, 15	A-port I/O	Bidirectional data pins connected to A bus; each includes 25-Ω series resistor and ±12 mA drive.
6, 14, 7, 13, 8, 12, 9, 11	B-port I/O	Bidirectional data pins connected to B bus; identical electrical characteristics to A-port pins.
10	DIR	Direction control input: LOW routes B→A, HIGH routes A→B; TTL-compatible thresholds (V_IL ≤ 0.8 V, V_IH ≥ 2 V).
20	OE	Output-enable input: LOW enables transceiver, HIGH forces all A/B outputs into high-impedance state.
11	GND	Ground reference for all I/O and internal logic; must be low-inductance connection for signal integrity.
20	V_CC	Positive supply (4.5–5.5 V); decoupling capacitor required within 1 cm of pin for noise suppression.

Key Features

Feature	Design Value
Integrated 25-Ω series termination	Eliminates external resistors on all 16 I/Os, reducing component count and PCB space while controlling edge overshoot/undershoot.
EPIC-II^B BiCMOS process	Reduces active power dissipation vs. legacy bipolar designs, enabling higher channel density in thermally constrained systems.
Power-up/power-down Hi-Z guarantee	Ensures bus isolation during supply ramping without external reset coordination or pullup networks.
High latch-up immunity	Exceeds 500 mA per JEDEC JESD-17 - critical for reliability in noisy industrial environments with ground bounce or supply transients.
Low ground bounce (V_OLP < 1 V)	Maintains signal integrity during simultaneous switching of multiple outputs at 5 V, reducing false triggering in downstream logic.

Applications

Industrial Backplane Interface	Memory Subsystem Isolation
Use Scenario: Isolating CPU address/data buses from peripheral expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional transceiver managing A→B (CPU→peripheral) and B→A (peripheral→CPU) data flow under DIR control, with OE enabling hot-swap safe bus disconnection. Use Value: Integrated 25-Ω resistors suppress reflections across long backplane traces; Hi-Z on power loss prevents bus contention during module insertion/removal.	Use Scenario: Separating SRAM or Flash memory data bus from microcontroller bus in safety-critical avionics modules. IC Role / Device Role / Timing Role: Octal line driver/transceiver providing direction-controlled data path between MCU D[7:0] and memory DQ[7:0], with OE synchronized to memory access strobes. Use Value: 4.5–5.5 V operation matches legacy memory voltage rails; <4.5 ns propagation delay ensures setup/hold timing margins at 20+ MHz access rates.
Legacy System Bus Bridge	Test Equipment Signal Routing
Use Scenario: Interfacing ISA-bus peripherals with modern FPGA-based controller cards in lab instrumentation upgrades. IC Role / Device Role / Timing Role: Translating bidirectional 8-bit data between ISA D[7:0] and FPGA I/O banks, using DIR to match ISA direction protocol and OE for bus arbitration. Use Value: TTL-compatible VIH/VIL thresholds ensure interoperability with 5-V ISA signaling; 12 mA drive sustains signal integrity over 15 cm ribbon cable runs.	Use Scenario: Configurable signal path switching in automated test equipment (ATE) fixture boards for DUT I/O routing. IC Role / Device Role / Timing Role: Reconfigurable 8-bit bus switch controlled by FPGA GPIOs (DIR = path direction, OE = path enable), supporting multiple DUT pin configurations. Use Value: Low ICC in Hi-Z state (<250 µA) minimizes standby power in multi-channel ATE systems; MSL-1 rating supports reflow assembly without moisture sensitivity concerns.

Industrial Backplane Interface

Memory Subsystem Isolation

Use Scenario: Isolating CPU address/data buses from peripheral expansion slots in programmable logic controllers.

IC Role / Device Role / Timing Role: Bidirectional transceiver managing A→B (CPU→peripheral) and B→A (peripheral→CPU) data flow under DIR control, with OE enabling hot-swap safe bus disconnection.

Use Value: Integrated 25-Ω resistors suppress reflections across long backplane traces; Hi-Z on power loss prevents bus contention during module insertion/removal.

Use Scenario: Separating SRAM or Flash memory data bus from microcontroller bus in safety-critical avionics modules.

IC Role / Device Role / Timing Role: Octal line driver/transceiver providing direction-controlled data path between MCU D[7:0] and memory DQ[7:0], with OE synchronized to memory access strobes.

Use Value: 4.5–5.5 V operation matches legacy memory voltage rails; <4.5 ns propagation delay ensures setup/hold timing margins at 20+ MHz access rates.

Legacy System Bus Bridge

Test Equipment Signal Routing

Use Scenario: Interfacing ISA-bus peripherals with modern FPGA-based controller cards in lab instrumentation upgrades.

IC Role / Device Role / Timing Role: Translating bidirectional 8-bit data between ISA D[7:0] and FPGA I/O banks, using DIR to match ISA direction protocol and OE for bus arbitration.

Use Value: TTL-compatible VIH/VIL thresholds ensure interoperability with 5-V ISA signaling; 12 mA drive sustains signal integrity over 15 cm ribbon cable runs.

Use Scenario: Configurable signal path switching in automated test equipment (ATE) fixture boards for DUT I/O routing.

IC Role / Device Role / Timing Role: Reconfigurable 8-bit bus switch controlled by FPGA GPIOs (DIR = path direction, OE = path enable), supporting multiple DUT pin configurations.

Use Value: Low ICC in Hi-Z state (<250 µA) minimizes standby power in multi-channel ATE systems; MSL-1 rating supports reflow assembly without moisture sensitivity concerns.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC2245APW	3.3-V only operation (1.65–3.6 V), lower drive (±24 mA), no integrated 25-Ω resistors.	Suitable for mixed-voltage 3.3-V systems but requires external termination; not drop-in for 5-V buses.	Select when migrating to 3.3-V logic families and external termination is acceptable.
SN74ABT2245N	DIP-20 package, same 5-V operation and 25-Ω termination, higher θ_JA (67°C/W), through-hole mounting.	Used in prototyping, legacy repair, or applications requiring socketed through-hole devices instead of surface-mount.	Select for hand-soldered prototypes or field-replaceable modules where TSSOP rework is impractical.

Compared with SN74LVC2245APW and SN74ABT2245N, the SN74ABTR2245PW uniquely combines 5-V compatibility, integrated termination, and TSSOP-20 packaging-enabling compact, robust, and drop-in-ready bus interfacing without redesigning termination or changing voltage domains.

Availability

SN74ABTR2245PW is available at Aetrix Electronics and suitable for industrial backplane interfaces, memory subsystem isolation, legacy system bus bridging, and test equipment signal routing requiring stable component supply and long-term manufacturability.

Supply support for SN74ABTR2245PW 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of heritage in high-reliability interface ICs.

The ABTR-series transceivers were engineered for robust 5-V bus interfacing in industrial and military systems, emphasizing latch-up immunity, power sequencing safety, and integrated signal integrity features.

FAQ

What is the recommended power supply decoupling for SN74ABTR2245PW?

Place a 0.1-µF ceramic capacitor between V_CC (pin 20) and GND (pin 11) within 1 cm of the SN74ABTR2245PW package. For systems with heavy simultaneous switching, add a bulk 4.7-µF tantalum or aluminum electrolytic capacitor near the power entry point. This ensures stable operation and minimizes ground bounce (V_OLP < 1 V) during fast transitions.

Does SN74ABTR2245PW support hot-plug operation?

Yes - the SN74ABTR2245PW enters a guaranteed high-impedance state when V_CC drops below 2.1 V, preventing bus contention during insertion or removal. To ensure full Hi-Z above 2.1 V, tie OE to V_CC via a pullup resistor (value determined by driver sink capability). This behavior makes SN74ABTR2245PW suitable for hot-swap backplane applications.

Can SN74ABTR2245PW drive unterminated 50-Ω transmission lines?

No - the SN74ABTR2245PW's integrated 25-Ω series resistor is optimized for stub-loaded or short-point-to-point traces, not 50-Ω controlled-impedance lines. For true 50-Ω line driving, use a dedicated line driver (e.g., SN65LVDS1) or add external series termination. Using SN74ABTR2245PW on 50-Ω lines may cause undershoot/overshoot exceeding specification limits.

What is the maximum data rate supported by SN74ABTR2245PW?

While not specified as a data rate, SN74ABTR2245PW's typical propagation delay (≤ 4.5 ns) and rise/fall times support reliable operation in systems with clock periods ≥ 10 ns - corresponding to effective data rates up to ~100 Mbps in non-return-to-zero (NRZ) bus protocols. Timing margin must be verified against actual load capacitance and trace length in the target design.

Is SN74ABTR2245PW pin-compatible with SN74ABT2245N?

Yes - SN74ABTR2245PW (TSSOP-20) and SN74ABT2245N (PDIP-20) share identical pin functions and logic behavior, including DIR, OE, A/B port mapping, and power/ground locations. However, due to differing package dimensions and thermal characteristics (θ_JA = 128°C/W vs. 67°C/W), thermal design and PCB layout must be adapted accordingly.

SN74ABTR2245PW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ABTR

Package/Case:: 20-TSSOP (0.173", 4.40mm 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:: 12mA, 12mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-TSSOP

SN74ABTR2245PW FAQ

1.How can I place an order for SN74ABTR2245PW through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ABTR2245PW 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 SN74ABTR2245PW reliable?

The price and inventory of SN74ABTR2245PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTR2245PW is usually 5 days.

3.What payment methods are accepted for SN74ABTR2245PW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABTR2245PW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ABTR2245PW?

SN74ABTR2245PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ABTR2245PW 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 SN74ABTR2245PW?

For technical support, including SN74ABTR2245PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTR2245PW requirements.

6.How does Aetrix verify that SN74ABTR2245PW is sourced from the original manufacturer or authorized distributors?

All SN74ABTR2245PW 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 SN74ABTR2245PW meets industry standards.

7.What is the process for return or replacement of SN74ABTR2245PW?

All SN74ABTR2245PW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTR2245PW, 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 SN74ABTR2245PW part is unused and in its original packaging.

Return procedure for SN74ABTR2245PW:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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