My Inquiry
My Account
Texas Instruments SN74ABTR2245DGVR
- Part No.:
- SN74ABTR2245DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABTR2245DGVR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,814
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABTR2245DGVR 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 provides high-impedance isolation during power-up/down - ideal for memory interface and board-level bus bridging applications.
For engineers reviewing the SN74ABTR2245DGVR datasheet, SN74ABTR2245DGVR pinout, SN74ABTR2245DGVR application, or SN74ABTR2245DGVR equivalent, key selection criteria include direction-control logic behavior, 3-state enable timing (tPZH/tPLZ ≤ 6.3 ns), output current capability (±12 mA), built-in termination, and DGV package thermal performance (θJA = 146°C/W).
Technical Context
This BiCMOS transceiver implements dual 8-bit bidirectional data paths controlled by DIR (direction) and OE (output enable) inputs. Its EPIC-IIB architecture enables low-power operation while maintaining TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V) and fast switching (tPLH/tPHL ≤ 4.5 ns at 5 V).
The device guarantees high-impedance state when VCC is below 2.1 V and requires OE tied to VCC via pullup resistor above that threshold. Output structures include internal 25-Ω series resistors to suppress overshoot/undershoot without external components.
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 mixed-voltage system rails. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and computing applications. |
| Output Drive | ±12 mA per channel - sufficient to drive terminated transmission lines or multiple TTL loads. |
| Propagation Delay | tPLH/tPHL ≤ 4.5 ns (VCC = 5 V, CL = 50 pF) - supports high-speed bus handshaking up to ~200 MHz effective data rate. |
| Enable/Disable Time | tPZH/tPLZ ≤ 6.3 ns - enables rapid bus arbitration and dynamic port isolation in multiprocessor systems. |
| Input Leakage | ±20 µA (A/B ports) - minimizes signal integrity impact on high-impedance control lines. |
| ESD Protection | >2000 V HBM, >200 V MM - meets MIL-STD-833 requirements for robust handling in manufacturing and field environments. |
Pinout & Package
SN74ABTR2245DGVR is housed in a 20-pin Thin Very Small-Outline (DGV) package, 4.4 mm × 6.5 mm footprint, 1.2 mm max height, with gull-wing leads and JEDEC MO-153 compliance. Pin 1 marked via index area; lead finish is NiPdAu, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | DIR | Direction control input: LOW routes B→A, HIGH routes A→B; TTL-compatible threshold. |
| 2–9 | A1–A8 | Port A I/O terminals - bidirectional, ±12 mA drive, integrated 25-Ω series resistor. |
| 10 | GND | Ground reference for all logic and output stages; decoupling required near pin. |
| 11–18 | B1–B8 | Port B I/O terminals - functionally identical to A-port with same drive and termination. |
| 19 | OE | Active-low output enable: HIGH disables both ports into high-Z state; critical for bus isolation. |
| 20 | VCC | Positive supply rail (4.5–5.5 V); requires local 0.1 µF ceramic bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω Series Termination | Eliminates need for external source-series resistors on all 16 I/O lines, reducing BOM count and PCB area. |
| Power-Up/Down High-Z Guarantee | Automatically enters high-impedance state when VCC < 2.1 V - prevents bus contention during sequencing. |
| EPIC-IIB BiCMOS Process | Reduces static power consumption vs. legacy bipolar designs while retaining speed and drive strength. |
| Latch-Up Immunity | Exceeds 500 mA per JESD17 - ensures robustness against transient-induced SCR triggering. |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V - maintains signal integrity during simultaneous output switching. |
Applications
| Memory Bus Isolation | Processor-to-Peripheral Bridging |
|---|---|
Use Scenario: Isolating DRAM address/data buses from CPU during DMA cycles or reset sequences. IC Role / Device Role / Timing Role: Bidirectional transceiver enabling controlled data flow between memory controller and SDRAM modules with precise OE-gated timing. Use Value: Prevents bus contention and signal corruption using guaranteed high-Z state during power transitions and OE assertion. | Use Scenario: Interfacing microcontroller GPIO banks with external peripherals (ADCs, DACs, FPGAs) operating on separate voltage domains. IC Role / Device Role / Timing Role: Level-shifting and bus-driving transceiver supporting synchronous read/write handshaking with sub-5 ns propagation delay. Use Value: Delivers ±12 mA drive and integrated 25-Ω termination to maintain signal fidelity across 10+ cm traces without external components. |
| Backplane Data Routing | Legacy System Bus Extension |
Use Scenario: Extending ISA or PCI-like parallel control/data buses across multi-board chassis with impedance-matched routing. IC Role / Device Role / Timing Role: Octal bidirectional repeater with matched trace-length delay and low ground bounce for multi-drop topologies. Use Value: Reduces EMI and reflections via on-die 25-Ω series resistors - eliminates need for discrete termination networks. | Use Scenario: Upgrading aging industrial controllers by adding modern peripheral interfaces while preserving legacy bus architecture. IC Role / Device Role / Timing Role: Drop-in compatible transceiver replacing obsolete 74LS245 variants with enhanced drive, lower power, and improved ESD tolerance. Use Value: Maintains pinout and logic behavior of legacy parts while delivering 50% lower ICC and >2× higher latch-up immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR | 3.3-V only operation (1.65–3.6 V), lower drive (±24 mA), no integrated series resistors. | Suitable for modern low-voltage systems; requires external termination for clean edges. | Choose when migrating to 3.3-V logic and board space allows discrete resistors. |
| SN74ABT245N | DIP-20 package, same 5-V operation and 25-Ω termination, but higher θJA (67°C/W) and larger footprint. | Fits through-hole prototyping or legacy repair; lacks surface-mount thermal efficiency of DGV. | Select for hand-soldered evaluation or replacement in existing DIP-based designs. |
Compared with SN74LVC245APWR and SN74ABT245N, the SN74ABTR2245DGVR uniquely combines 5-V operation, integrated 25-Ω termination, and ultra-compact DGV packaging - making it optimal for space-constrained industrial boards requiring robust 5-V bus interfacing without layout overhead.
Availability
SN74ABTR2245DGVR is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and test equipment applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SN74ABTR2245DGVR 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 over 90 years of innovation in high-reliability IC design.
The ABTR2245 family belongs to TI's advanced bus-interface logic portfolio, engineered specifically for noise-immune, high-speed bidirectional data transfer in mission-critical industrial and computing infrastructure.
FAQ
What is the maximum recommended operating voltage for SN74ABTR2245DGVR?
The absolute maximum supply voltage for SN74ABTR2245DGVR is 7 V, but the recommended operating range is strictly 4.5 V to 5.5 V per the datasheet. Operating outside this window risks violating timing specifications, increasing ICC, or compromising latch-up immunity. The SN74ABTR2245DGVR must be powered within 4.5–5.5 V to guarantee full functionality including 3-state control, propagation delay, and output drive performance.
Does SN74ABTR2245DGVR require external pull-up resistors on DIR or OE pins?
OE must be pulled up to VCC via an external resistor when VCC exceeds 2.1 V to ensure reliable high-impedance state; minimum value depends on driver sink capability (typically 4.7 kΩ). DIR has no mandatory pull-up requirement - it may be driven directly from CMOS/TTL logic. The SN74ABTR2245DGVR itself does not include internal pull-ups on either control pin.
Can SN74ABTR2245DGVR be used in 3.3-V systems?
No - SN74ABTR2245DGVR is specified only for 4.5–5.5 V operation. Input thresholds (VIH = 2 V, VIL = 0.8 V) and output VOH/VOL levels assume 5-V VCC. Using it with 3.3-V logic violates recommended conditions and may result in marginal noise margins, increased ICC, or undefined 3-state behavior. For 3.3-V systems, consider SN74LVC245A instead.
What is the thermal resistance (θJA) of the SN74ABTR2245DGVR package?
The SN74ABTR2245DGVR uses a 20-pin Thin Very Small-Outline (DGV) package with a published junction-to-ambient thermal resistance (θJA) of 146°C/W under standard JEDEC test conditions. This value assumes a 1-inch² copper pad with two vias; actual board-level θJA will vary based on PCB layout, copper area, and airflow. Derating is required above 70°C ambient for continuous 12-mA per-pin loading.
How does the integrated 25-Ω series resistor in SN74ABTR2245DGVR improve signal integrity?
The integrated 25-Ω series resistor in each SN74ABTR2245DGVR I/O path damps transmission-line reflections at the source, reducing overshoot and undershoot without requiring discrete components. This improves eye diagram margin on PCB traces up to ~10 cm in length at 5-V signaling, lowers EMI emissions, and simplifies layout - especially critical in dense industrial backplanes where routing stubs and impedance mismatches are common. The resistor value is trimmed during wafer test for consistency.
SN74ABTR2245DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTR
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TVSOP
SN74ABTR2245DGVR FAQ
1.How can I place an order for SN74ABTR2245DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTR2245DGVR 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 SN74ABTR2245DGVR reliable?
The price and inventory of SN74ABTR2245DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTR2245DGVR is usually 5 days.
3.What payment methods are accepted for SN74ABTR2245DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABTR2245DGVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABTR2245DGVR?
SN74ABTR2245DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTR2245DGVR 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 SN74ABTR2245DGVR?
For technical support, including SN74ABTR2245DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTR2245DGVR requirements.
6.How does Aetrix verify that SN74ABTR2245DGVR is sourced from the original manufacturer or authorized distributors?
All SN74ABTR2245DGVR 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 SN74ABTR2245DGVR meets industry standards.
7.What is the process for return or replacement of SN74ABTR2245DGVR?
All SN74ABTR2245DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTR2245DGVR, 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 SN74ABTR2245DGVR part is unused and in its original packaging.
Return procedure for SN74ABTR2245DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABTR2245DGVR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
