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Texas Instruments SN74ABTH245DGVRE4
- Part No.:
- SN74ABTH245DGVRE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABTH245DGVRE4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,046
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Product details
Overview
SN74ABTH245DGVRE4 from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between A and B buses in industrial control and embedded system interconnects. It features ±32-mA high-drive outputs, bus-hold on all data inputs, Ioff support for hot insertion, and operates over –40°C to 85°C at 4.5–5.5 V supply.
For engineers reviewing the SN74ABTH245DGVRE4 datasheet, SN74ABTH245DGVRE4 pinout, SN74ABTH245DGVRE4 application, or SN74ABTH245DGVRE4 equivalent, this device is selected for robust 5-V logic-level bus isolation, low ground bounce (<1 V), and latch-up immunity exceeding 500 mA per JESD 17 - critical for mixed-voltage board interfaces and hot-pluggable modules.
Technical Context
The SN74ABTH245DGVRE4 implements EPIC-IIB BiCMOS architecture to reduce dynamic power while maintaining TTL-compatible drive strength. Its DIR and OE control logic enables direction-selectable data flow (A↔B) with simultaneous 3-state isolation when OE is high.
Bus-hold circuitry actively maintains valid logic levels on floating A/B inputs without external resistors, and Ioff protection limits reverse current during partial power-down - both essential for system-level reliability in modular backplane and peripheral interface designs.
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 stable operation across industrial voltage tolerances. |
| Output Drive | –32 mA IOH / +64 mA IOL - supports heavy capacitive loads and long trace routing without signal degradation. |
| Propagation Delay | 0.8–3.9 ns (tPLH/tPHL) - enables high-speed bus handshaking up to ~250 MHz effective throughput in synchronous protocols. |
| Bus-Hold Current | ±100 µA at VI = 0.8 V or 2 V - eliminates need for external pull-up/down resistors on unused data lines, reducing BOM count and layout complexity. |
| Thermal Resistance | θJA = 92°C/W (DGV package) - defines maximum power dissipation limit under natural convection cooling in compact PCB layouts. |
| Ioff Leakage | ±100 µA at VCC = 0 V - prevents damaging backflow current during hot-insertion or partial power sequencing. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications including PLC I/O modules and motor drive controllers. |
Pinout & Package
SN74ABTH245DGVRE4 uses a 20-pin Thin Very Small-Outline (DGV) package, 4.4 mm × 3.6 mm body, 0.5 mm pitch, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, DIR | Direction Control Input | Low = B→A data transfer; High = A→B transfer - determines real-time bus flow direction without reconfiguration. |
| 2–9, A1–A8 | Data Inputs/Outputs (Port A) | Bidirectional I/O with bus-hold; connect to microcontroller or FPGA data bus segment A. |
| 10, GND | Ground Reference | Primary return path for all internal logic and output drivers; must be low-impedance connection. |
| 11, VCC | Power Supply | +5 V supply for core logic and output stages; requires local 0.1 µF ceramic decoupling. |
| 12–19, B1–B8 | Data Inputs/Outputs (Port B) | Bidirectional I/O with bus-hold; connects to peripheral or memory bus segment B. |
| 20, OE | Output Enable Input | Low = outputs active; High = all A/B pins enter high-impedance state - enables bus arbitration and isolation. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS Process | Reduces dynamic power vs. standard bipolar TTL while retaining high noise immunity and drive capability. |
| Hot-Insertion Support | Guaranteed Ioff and power-up 3-state behavior prevent damage during live board replacement in rack-mounted systems. |
| Bus-Hold Circuitry | Eliminates external biasing components on all 16 data lines - reduces PCB area, assembly cost, and failure points. |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V - minimizes switching noise coupling into shared ground planes in dense digital systems. |
| Latch-Up Immunity | Exceeds 500 mA per JESD 17 - ensures robustness against transient overcurrent events in industrial environments. |
Applications
| Industrial PLC Backplane Interface | Microcontroller-to-Peripheral Bus Isolation |
|---|---|
Use Scenario: Interfacing a 5-V microcontroller data bus to isolated I/O expansion modules in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional level-shifting and bus-isolating transceiver enabling safe hot-swap of I/O cards without disrupting main CPU bus. Use Value: Ioff and power-up 3-state prevent backfeed during card insertion; bus-hold avoids floating inputs on disconnected modules. |
Use Scenario: Connecting an FPGA's general-purpose I/O bank to legacy parallel peripherals (e.g., LCD controllers, ADCs) requiring strict 5-V signaling. IC Role / Device Role / Timing Role: Direction-controlled data bridge with sub-4-ns propagation delay to meet tight setup/hold timing margins. Use Value: ±64-mA drive sustains signal integrity across 10+ cm traces; low VOLP prevents ground noise from corrupting adjacent analog sections. |
| Automated Test Equipment (ATE) Signal Routing | Embedded Data Acquisition Front-End |
Use Scenario: Multiplexing multiple sensor input channels onto a shared 5-V data acquisition bus in modular test fixtures. IC Role / Device Role / Timing Role: 3-state-enabled bus transceiver allowing dynamic channel selection and isolation via OE control. Use Value: Fast enable/disable times (tPZL/tPHZ ≤ 7 ns) support rapid channel switching; latch-up immunity withstands ESD events common in lab environments. |
Use Scenario: Isolating a microcontroller's internal bus from external sensor interface boards in medical or environmental monitoring devices. IC Role / Device Role / Timing Role: Hot-plug-capable bus buffer ensuring safe field replacement of sensor modules without powering down the host system. Use Value: DGV package enables compact 2-layer PCB layout; –40°C to +85°C rating supports uncontrolled ambient deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus 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 bus-hold; CMOS process. | Suitable for modern low-voltage systems but incompatible with 5-V buses without level translation. | Select when migrating to 3.3-V domains and external pull resistors are acceptable. |
| 74ABT245N | PDIP-20 package only; identical 5-V specs and pinout; no DGV option; RoHS exemption status differs. | Preferred for through-hole prototyping or legacy board repairs where surface-mount is not feasible. | Choose for manual assembly, breadboarding, or drop-in replacement on existing DIP-based designs. |
Compared with SN74LVC245APWR and 74ABT245N, the SN74ABTH245DGVRE4 uniquely combines 5-V tolerance, integrated bus-hold, hot-insertion safety, and space-saving DGV packaging - making it optimal for industrial-grade surface-mount bus isolation where voltage compatibility and reliability are non-negotiable.
Availability
SN74ABTH245DGVRE4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller peripheral interfaces, automated test equipment signal routing, and embedded data acquisition front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74ABTH245DGVRE4 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 connectivity technologies, with decades of heritage in logic IC design and industrial-grade reliability validation.
The ABTH logic family - including SN74ABTH245DGVRE4 - was engineered for high-noise industrial environments, emphasizing latch-up immunity, hot-swap safety, and robust 5-V bus interfacing in programmable controllers and factory automation systems.
FAQ
What is the operating temperature range for SN74ABTH245DGVRE4?
The SN74ABTH245DGVRE4 is specified for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is validated per the manufacturer's recommended operating conditions and supports deployment in control cabinets, motor drives, and outdoor instrumentation without derating.
Does SN74ABTH245DGVRE4 support hot insertion?
Yes, SN74ABTH245DGVRE4 fully supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0 V to block reverse current, and power-up 3-state ensures outputs remain high-impedance during power ramp-up - both verified per TI's production test flow.
What package type is used by SN74ABTH245DGVRE4?
SN74ABTH245DGVRE4 uses a 20-pin Thin Very Small-Outline (DGV) package: 4.4 mm × 3.6 mm body, 0.5 mm lead pitch, 1.2 mm maximum height, RoHS-compliant NiPdAu finish, and JEDEC MO-179 compliant footprint.
How does bus-hold functionality work on SN74ABTH245DGVRE4?
SN74ABTH245DGVRE4 integrates active bus-hold circuitry on all 16 data I/Os (A1–A8, B1–B8), maintaining valid logic levels (VIH/VIL) on floating inputs with ±100 µA hold current - eliminating external pull resistors and preventing metastability in unconnected or unterminated bus segments.
What are the absolute maximum ratings for SN74ABTH245DGVRE4?
Per the official datasheet, SN74ABTH245DGVRE4 has absolute maximum ratings of: VCC = –0.5 V to +7 V; VI = –0.5 V to +7 V; VO = –0.5 V to +5.5 V; IOL peak = 128 mA; storage temperature = –65°C to +150°C - exceeding these may cause permanent damage.
SN74ABTH245DGVRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TVSOP
SN74ABTH245DGVRE4 FAQ
1.How can I place an order for SN74ABTH245DGVRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH245DGVRE4 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 SN74ABTH245DGVRE4 reliable?
The price and inventory of SN74ABTH245DGVRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH245DGVRE4 is usually 5 days.
3.What payment methods are accepted for SN74ABTH245DGVRE4?
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4.How is shipping managed for SN74ABTH245DGVRE4?
SN74ABTH245DGVRE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH245DGVRE4 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 SN74ABTH245DGVRE4?
For technical support, including SN74ABTH245DGVRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH245DGVRE4 requirements.
6.How does Aetrix verify that SN74ABTH245DGVRE4 is sourced from the original manufacturer or authorized distributors?
All SN74ABTH245DGVRE4 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 SN74ABTH245DGVRE4 meets industry standards.
7.What is the process for return or replacement of SN74ABTH245DGVRE4?
All SN74ABTH245DGVRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH245DGVRE4, 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 SN74ABTH245DGVRE4 part is unused and in its original packaging.
Return procedure for SN74ABTH245DGVRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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