My Inquiry
My Account
Texas Instruments SN74ABTH245DGVR
- Part No.:
- SN74ABTH245DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74ABTH245DGVR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABTH245DGVR 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 and embedded systems. It features ±32-mA high-drive outputs, bus-hold circuitry eliminating external pull resistors, Ioff support for hot insertion, and operates from –40°C to 85°C at 4.5–5.5 V.
For engineers reviewing the SN74ABTH245DGVR datasheet, SN74ABTH245DGVR pinout, SN74ABTH245DGVR application, or SN74ABTH245DGVR equivalent, this page delivers verified electrical specs, thermal performance (θJA = 92°C/W), switching timing (tPLH/tPHL ≤ 3.6 ns), bus-hold behavior, and hot-swap compatibility - all critical for legacy TTL-level bus isolation and level-shifting designs.
Technical Context
This device implements EPIC-IIB BiCMOS logic to achieve low power dissipation while maintaining TTL-compatible voltage thresholds (VIH = 2 V, VIL = 0.8 V) and robust output drive (–32 mA IOH, 64 mA IOL). Its direction-control (DIR) and output-enable (OE) inputs enable flexible bidirectional flow control without external logic.
The integrated bus-hold circuitry actively maintains valid logic levels on floating A/B port inputs (II(hold) = ±100 µA), and Ioff protection limits reverse current to ±100 µA when VCC = 0 V - both essential for system-level reliability during partial power-down or hot-plug events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-voltage backplane interfaces. |
| IOH / IOL | –32 mA / 64 mA - drives heavy capacitive loads and long traces without external buffers in industrial backplanes. |
| tPLH / tPHL | ≤ 3.6 ns - supports high-speed data handshaking up to ~275 MHz in point-to-point configurations (CL = 50 pF). |
| θJA | 92°C/W - matches DGV (TSSOP-20) package thermal profile; requires minimal PCB copper for thermal management. |
| Bus-Hold Current | ±100 µA - actively clamps unused data lines to valid logic states, removing need for 4.7-kΩ pull-up/down resistors. |
| Ioff | ±100 µA at VCC = 0 - prevents damaging backflow current during hot insertion or partial system power-down. |
| Operating Temp | –40°C to +85°C - qualified for commercial/industrial environments including factory automation and test equipment. |
Pinout & Package
TSSOP-20 (DGV) package: 4.4 mm × 6.5 mm, 1.2 mm max height, 0.65 mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | DIR | Direction control: LOW enables B→A transfer; HIGH enables A→B transfer - determines data flow path synchronously. |
| 2–9 | A1–A8 | Input/output port A - connects to source bus; bus-hold active when floating; driven by DIR/OE logic. |
| 11–18 | B1–B8 | Input/output port B - connects to destination bus; identical bus-hold and drive capability as A-side. |
| 10 | GND | Ground reference - must be low-impedance connection to minimize ground bounce (VOLP < 1 V). |
| 20 | VCC | Power supply - decoupling capacitor (0.1 µF) required near pin for stable 5-V operation and noise immunity. |
| 19 | OE | Output enable: LOW activates transceiver; HIGH forces all A/B outputs into high-impedance state - isolates buses. |
Key Features
| Feature | Design Value |
|---|---|
| EPIC-IIB BiCMOS Process | Reduces static power consumption vs. standard bipolar TTL while retaining speed and drive strength. |
| Hot-Insertion Support | Ioff and power-up 3-state ensure safe insertion into live backplanes without disrupting adjacent devices. |
| Integrated Bus-Hold | Eliminates 16 external pull resistors (8 per side), reducing BOM count and board space in dense bus architectures. |
| High-Drive Outputs | –32 mA IOH / 64 mA IOL sustains signal integrity across 10+ cm PCB traces loaded with multiple TTL inputs. |
| Low Ground Bounce | VOLP < 1 V at VCC = 5 V, TA = 25°C - minimizes noise coupling into shared ground planes in multi-channel systems. |
Applications
| Industrial Backplane Interface | Legacy System Bus Isolation |
|---|---|
Use Scenario: Isolating CPU address/data bus from peripheral expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver enabling synchronous read/write cycles between master and slave modules. Use Value: Bus-hold eliminates pull resistors on 16-bit parallel bus; 3-state isolation prevents contention during slot reset or firmware update. |
Use Scenario: Interfacing modern microcontrollers to legacy ISA or VMEbus peripherals requiring 5-V TTL signaling. IC Role / Device Role / Timing Role: Level-shifting and direction-controlled data bridge between mismatched voltage domains and timing protocols. Use Value: High-drive outputs drive long bus stubs; tPLH/tPHL ≤ 3.6 ns meets ISA timing budgets without added wait states. |
| Test Equipment Signal Routing | Automated Test Fixture Control |
Use Scenario: Dynamic reconfiguration of signal paths in automated board test systems using relayless switching. IC Role / Device Role / Timing Role: Low-latency bidirectional data switch controlled via FPGA GPIO for stimulus/response routing. Use Value: OE-controlled 3-state allows glitch-free bus sharing among multiple DUT interfaces; θJA = 92°C/W supports compact stacked layouts. |
Use Scenario: Controlling parallel I/O lines (e.g., JTAG, boundary scan, or sensor arrays) in production test fixtures. IC Role / Device Role / Timing Role: Robust bus driver ensuring reliable logic-level translation under noisy factory floor conditions. Use Value: Ioff protection prevents damage during fixture cable swaps; latch-up immunity >500 mA per JESD 17 enhances field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245A | 3.3-V only operation (1.65–3.6 V); lower drive (–24 mA / 24 mA); no bus-hold; CMOS input thresholds. | Suitable for modern low-voltage digital systems but incompatible with 5-V TTL buses without level shifters. | Select when migrating to 3.3-V logic families and external pull resistors are acceptable. |
| SN74ABT245 | Same 5-V operation and pinout, but lacks Ioff and bus-hold; higher ICC (30 mA typical); no hot-insertion support. | Functional replacement where hot-swap is not required and board layout accommodates external pull resistors. | Choose only for cost-sensitive legacy upgrades where thermal margin and bus stability are less critical. |
Compared with SN74LVC245A and SN74ABT245, the SN74ABTH245DGVR uniquely combines 5-V TTL compatibility, integrated bus-hold, Ioff-enabled hot insertion, and 92°C/W thermal performance - making it irreplaceable in industrial backplane and test fixture designs requiring zero-resistor bus termination and live-system modularity.
Availability
SN74ABTH245DGVR is available at Aetrix Electronics and suitable for industrial backplane interface, legacy system bus isolation, and automated test fixture control requiring stable component supply across extended product lifecycles.
Supply support for SN74ABTH245DGVR 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 50 years of industrial-grade component heritage.
The ABTH logic family targets high-reliability, high-drive 5-V bus interfacing applications - specifically engineered for noise-immune data transfer in factory automation, test equipment, and military-grade commercial systems.
FAQ
What is the maximum operating temperature range for the SN74ABTH245DGVR?
The SN74ABTH245DGVR is characterized for operation from –40°C to +85°C, meeting industrial temperature requirements. This range is validated per the recommended operating conditions in the official TI datasheet SCBS663D, and applies specifically to the DGV (TSSOP-20) package variant. Operation outside this range may result in undefined timing or output behavior.
Does the SN74ABTH245DGVR require external pull-up or pull-down resistors on its data lines?
No. The SN74ABTH245DGVR includes active bus-hold circuitry on all A and B port inputs, which maintains valid logic levels on floating lines with ±100 µA hold current. This eliminates the need for external pull resistors - a key design simplification confirmed in the device description and electrical characteristics tables of the SCBS663D datasheet.
Is the SN74ABTH245DGVR compatible with hot-insertion into a live 5-V backplane?
Yes. The SN74ABTH245DGVR incorporates Ioff circuitry that limits reverse current to ±100 µA when VCC = 0 V, and power-up 3-state logic that holds outputs in high-impedance until VCC exceeds 2.1 V. These features are explicitly validated for hot-insertion applications per the datasheet's "Ioff and Power-Up 3-State Support Hot Insertion" section.
What is the thermal resistance (θJA) of the SN74ABTH245DGVR in its DGV package?
The SN74ABTH245DGVR in the DGV (TSSOP-20) package has a junction-to-ambient thermal resistance (θJA) of 92°C/W, as specified in the Absolute Maximum Ratings table of the SCBS663D datasheet. This value assumes standard JEDEC test conditions (single-layer 1-in² copper pad) and informs heatsinking requirements for continuous 64-mA IOL operation.
How does the direction-control (DIR) and output-enable (OE) logic interact in the SN74ABTH245DGVR?
In the SN74ABTH245DGVR, OE must be LOW to activate the transceiver; when OE is HIGH, all A/B outputs enter high-impedance regardless of DIR state. When OE is LOW, DIR determines direction: DIR = LOW enables B→A data flow, and DIR = HIGH enables A→B flow - per the Function Table in the SCBS663D datasheet.
SN74ABTH245DGVR 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
SN74ABTH245DGVR FAQ
1.How can I place an order for SN74ABTH245DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABTH245DGVR 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 SN74ABTH245DGVR reliable?
The price and inventory of SN74ABTH245DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH245DGVR is usually 5 days.
3.What payment methods are accepted for SN74ABTH245DGVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABTH245DGVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABTH245DGVR?
SN74ABTH245DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABTH245DGVR 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 SN74ABTH245DGVR?
For technical support, including SN74ABTH245DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH245DGVR requirements.
6.How does Aetrix verify that SN74ABTH245DGVR is sourced from the original manufacturer or authorized distributors?
All SN74ABTH245DGVR 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 SN74ABTH245DGVR meets industry standards.
7.What is the process for return or replacement of SN74ABTH245DGVR?
All SN74ABTH245DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH245DGVR, 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 SN74ABTH245DGVR part is unused and in its original packaging.
Return procedure for SN74ABTH245DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABTH245DGVR 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…
