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Texas Instruments SN74ABTR2245PWR
- Part No.:
- SN74ABTR2245PWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABTR2245PWR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,009
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Product details
Overview
SN74ABTR2245PWR from Texas Instruments is an octal transceiver with 3-state outputs, designed for bidirectional asynchronous 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 capability per I/O. It is used in memory interface buffering and legacy parallel bus isolation.
For engineers reviewing the SN74ABTR2245PWR datasheet, SN74ABTR2245PWR pinout, SN74ABTR2245PWR application, or SN74ABTR2245PWR equivalent, key selection considerations include its 20-pin TSSOP (PW) package, direction-controlled bidirectional data flow, high-impedance state during power-up/down, and built-in termination eliminating external resistors.
Technical Context
The SN74ABTR2245PWR implements a dual-bus transceiver architecture with independent DIR (direction control) and OE (output enable) inputs. Its EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible voltage thresholds (VIL = 0.8 V, VIH = 2 V) and fast switching (tPLH/tPHL ≤ 4 ns at 5 V).
Each A- and B-port output integrates a nominal 25-Ω series resistor to suppress signal overshoot/undershoot without external components. The device enters high-impedance state when VCC is below 2.1 V or when OE is high, and latches robustly with >500 mA latch-up immunity per JESD-17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and LVTTL systems. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications. |
| Output Drive | ±12 mA - Sufficient to drive standard TTL loads and stubbed parallel buses. |
| Propagation Delay | ≤ 4.5 ns (tPHL, tPLH) - Enables reliable operation in high-speed 25+ MHz bus environments. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - Matches standard TTL logic levels for seamless interfacing. |
| Output Termination | Integrated 25-Ω series resistor - Eliminates need for external series termination on PCB traces. |
| Power-Up State | High-impedance when VCC < 2.1 V - Prevents bus contention during power sequencing. |
Pinout & Package
TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 1.2 mm max height, 0.65 mm pitch, lead-free NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: Low = B→A, High = A→B data flow. |
| 2–9 | A1–A8 | A-port bidirectional I/O pins - connect to source bus (e.g., microcontroller data bus). |
| 10 | GND | Ground reference for all internal circuitry and I/O. |
| 11–18 | B1–B8 | B-port bidirectional I/O pins - connect to destination bus (e.g., memory or peripheral bus). |
| 19 | OE | Output enable: Low = active transceiver, High = 3-state isolation of both ports. |
| 20 | VCC | Positive supply input (4.5–5.5 V) - powers internal logic and output drivers. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω series output resistors | Reduces PCB component count and layout complexity by eliminating external termination resistors on each line. |
| EPIC-IIB BiCMOS process | Delivers <250 µA ICC in 3-state mode and <32 mA ICC under full load - lowers system power budget vs. older bipolar designs. |
| Power-up/power-down high-impedance | Prevents bus contention during supply ramping - no external pull-ups needed on OE for safe boot sequences. |
| 2000-V HBM ESD protection | Meets MIL-STD-833 Class 3015 requirements - enhances reliability in handling and board assembly environments. |
| Latch-up immunity >500 mA | Complies with JEDEC JESD-17 - ensures robustness against transient current faults in noisy industrial settings. |
Applications
| Memory Bus Isolation | Legacy Parallel Interface Bridging |
|---|---|
Use Scenario: Isolating DRAM address/data lines from CPU bus during DMA cycles or low-power states. IC Role / Device Role / Timing Role: Bidirectional transceiver enabling controlled data flow between memory controller and DRAM module with precise direction and enable timing. Use Value: Integrated 25-Ω termination minimizes signal reflections on 50-Ω trace environments, improving setup/hold margin at 25 MHz bus speeds. | Use Scenario: Interfacing an FPGA's general-purpose I/O bank to a legacy ISA-style peripheral card with separate A/B bus segments. IC Role / Device Role / Timing Role: Level-shifting and bus-separation transceiver supporting independent control of data direction (DIR) and driver enable (OE) for synchronous handshaking. Use Value: TTL-compatible thresholds and ±12 mA drive ensure reliable logic-level translation without external level shifters or buffers. |
| Industrial Backplane Buffering | Test Equipment Signal Routing |
Use Scenario: Buffering parallel control signals across a 100-mm backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Octal line driver/transceiver providing noise-immune signal integrity between slot connectors using controlled-impedance routing. Use Value: Low ground bounce (<1 V VOLP) and fast enable/disable times (tPZH/tPHZ ≤ 6.3 ns) reduce crosstalk and timing skew across multi-drop buses. | Use Scenario: Reconfigurable signal path selection in automated test equipment (ATE) where DUT I/O must be dynamically connected to stimulus or measurement resources. IC Role / Device Role / Timing Role: 3-state isolator enabling software-controlled routing of up to eight bidirectional signals between test head and DUT interface. Use Value: High-impedance state during power transitions prevents false triggering on unpowered DUTs, improving test repeatability and safety. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APW | 3.3-V only (1.65–3.6 V), lower drive (24 mA), no integrated 25-Ω resistors. | Requires external series termination; suited for modern low-voltage systems, not 5-V legacy buses. | Select when migrating to 3.3-V logic and board space allows discrete termination. |
| SN74ABT245N | DIP-20 package, same 5-V operation and 25-Ω termination, but larger footprint and higher θJA (67°C/W). | Used in through-hole prototyping or legacy repair; lacks RoHS-compliant TSSOP form factor. | Choose for breadboard evaluation or replacement in existing DIP-based designs. |
Compared with SN74LVC245APW and SN74ABT245N, the SN74ABTR2245PWR uniquely combines 5-V operation, integrated 25-Ω termination, and compact TSSOP-20 packaging - making it optimal for space-constrained industrial 5-V bus isolation where signal integrity and drop-in compatibility are critical.
Availability
SN74ABTR2245PWR is available at Aetrix Electronics and suitable for industrial control systems, legacy memory subsystems, and test equipment requiring stable component supply and long-term obsolescence management.
Supply support for SN74ABTR2245PWR 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The ABTR-series transceivers were developed specifically for robust 5-V bus interfacing in mission-critical industrial and computing infrastructure - prioritizing noise immunity, power sequencing safety, and long-lifecycle support.
FAQ
What is the maximum clock/data rate supported by SN74ABTR2245PWR?
The SN74ABTR2245PWR is not a clocked device but a transparent transceiver. Its 4.5 ns typical propagation delay (tPLH/tPHL) supports reliable operation in asynchronous 25+ MHz parallel bus environments. System-level data rate depends on bus loading and trace length, but the device itself imposes no inherent frequency limit beyond its specified switching characteristics under CL = 50 pF.
Does SN74ABTR2245PWR require external pull-up resistors on DIR or OE?
No external pull-ups are required on DIR, but OE should be tied to VCC via a pull-up resistor if guaranteed high-impedance state above 2.1 V is needed - minimum value determined by driver sink capability. The SN74ABTR2245PWR enters high-Z during power-up/down (VCC < 2.1 V) inherently, so OE pull-up is optional for most industrial applications.
Can SN74ABTR2245PWR operate at 3.3 V?
No. The SN74ABTR2245PWR is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, VIH/VIL thresholds are not met, output drive degrades significantly, and functionality is not guaranteed. For 3.3-V systems, consider SN74LVC245APW instead.
What is the thermal resistance (θJA) of SN74ABTR2245PWR in its TSSOP-20 package?
The SN74ABTR2245PWR in TSSOP-20 (PW) package has a specified junction-to-ambient thermal resistance (θJA) of 128°C/W under standard JEDEC test conditions. This value assumes a 1-inch² copper pad with two vias; actual board layout will affect real-world thermal performance.
Is SN74ABTR2245PWR pin-compatible with SN74ABT245N?
No. While both are octal transceivers with identical logic function and 5-V operation, SN74ABTR2245PWR uses a 20-pin TSSOP (PW) package with 0.65 mm pitch, whereas SN74ABT245N uses a 20-pin PDIP (N) package with 2.54 mm pitch. Pin numbering and physical layout differ - they are functionally equivalent but not mechanically interchangeable.
SN74ABTR2245PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTR
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
SN74ABTR2245PWR FAQ
1.How can I place an order for SN74ABTR2245PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTR2245PWR 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 SN74ABTR2245PWR reliable?
The price and inventory of SN74ABTR2245PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTR2245PWR is usually 5 days.
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Once your SN74ABTR2245PWR 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 SN74ABTR2245PWR?
For technical support, including SN74ABTR2245PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTR2245PWR requirements.
6.How does Aetrix verify that SN74ABTR2245PWR is sourced from the original manufacturer or authorized distributors?
All SN74ABTR2245PWR 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 SN74ABTR2245PWR meets industry standards.
7.What is the process for return or replacement of SN74ABTR2245PWR?
All SN74ABTR2245PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTR2245PWR, 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 SN74ABTR2245PWR part is unused and in its original packaging.
Return procedure for SN74ABTR2245PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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