My Inquiry
My Account
Texas Instruments SN74ABT245BDBRG4
- Part No.:
- SN74ABT245BDBRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT245BDBRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,994
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74ABT245BDBRG4 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 communication systems. It features high-drive outputs (−32 mA IOH, 64 mA IOL), hot-insertion support via Ioff and power-up 3-state, and operates across −40°C to +85°C with 4.5–5.5 V supply.
For engineers reviewing the SN74ABT245BDBRG4 datasheet, SN74ABT245BDBRG4 pinout, SN74ABT245BDBRG4 application, or SN74ABT245BDBRG4 equivalent, key selection criteria include direction-control logic behavior, output isolation during power sequencing, ground-bounce performance (<1 V VOLP), and SSOP-20 package compatibility with legacy 5-V TTL-level bus architectures.
Technical Context
This device implements dual 8-bit bidirectional data paths controlled by DIR (direction) and OE (output-enable) inputs. When OE is low, data flows either A→B (DIR = high) or B→A (DIR = low); when OE is high, all outputs enter high-impedance state regardless of DIR. The Ioff circuitry actively disables outputs at VCC = 0 V, preventing backflow current during hot insertion.
Propagation delays are tightly specified: tPLH/tPHL ≤ 3.9 ns (max), tPZL/tPZH ≤ 6.2 ns (max) at VCC = 5 V, CL = 50 pF. Input hysteresis (Vhys = 100 mV) improves noise immunity on control lines, while latch-up performance exceeds 500 mA per JEDEC JESD17.
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 CMOS logic rails without level-shifting. |
| High-Level Output Current | −32 mA IOH - drives heavy capacitive loads or multiple TTL inputs without signal degradation. |
| Low-Level Output Current | 64 mA IOL - supports robust sink capability for pull-down-dominated bus topologies. |
| Propagation Delay | ≤3.9 ns max (tPHL/tPLH) - enables reliable operation in high-speed 5-V digital systems up to ~200 MHz effective data rate. |
| Ground Bounce (VOLP) | <1 V at VCC = 5 V, TA = 25°C - minimizes switching noise-induced logic errors during simultaneous output transitions. |
| Hot-Insertion Support | Ioff and power-up 3-state - prevents damaging current flow and bus contention during live board insertion or removal. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environmental stress without derating. |
Pinout & Package
SN74ABT245BDBRG4 uses a 20-pin SSOP (Shrink Small Outline Package) with 0.65 mm pitch, 7.4 mm × 5.3 mm body, and 2.0 mm max height per JEDEC MO-150. Pin 1 index is marked by a beveled corner or dot; package is RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 inputs/outputs | Port A bidirectional data terminals - connect to upstream bus segment; direction determined by DIR input. |
| 9 | DIR | Direction-control input - high enables A→B transfer; low enables B→A transfer. |
| 10, 11, 12, 13, 14, 15, 16, 17 | B1–B8 inputs/outputs | Port B bidirectional data terminals - connect to downstream bus segment; function mirrors A port under DIR control. |
| 18 | OE | Output-enable active-low input - high forces all A/B outputs into high-impedance state for bus isolation. |
| 19 | GND | Power ground reference - must be low-impedance connection to minimize noise coupling and ground bounce. |
| 20 | VCC | Positive supply rail - decoupling capacitor (0.1 µF ceramic) required adjacent to pin for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | −32 mA source / 64 mA sink capability - eliminates need for external buffer stages in dense 5-V bus designs. |
| Hot-Insertion Ready | Ioff ≤ ±100 µA at VCC = 0 V - prevents backfeed damage when inserted into powered-backplane systems. |
| Power-Up 3-State | Outputs remain high-Z during VCC ramp-up - avoids bus conflicts before system initialization completes. |
| Robust ESD Protection | 2000-V HBM, 200-V MM per JESD22 - withstands handling and board assembly without additional protection circuitry. |
| Latch-Up Immunity | >500 mA per JEDEC JESD17 - survives transient overcurrent events without destructive latch-up. |
Applications
| Industrial PLC Backplane Interface | Legacy 5-V Microcontroller Bus Expansion |
|---|---|
|
Use Scenario: Isolating CPU local bus from modular I/O rack backplane in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional data bridge enabling read/write access to distributed analog/digital modules while maintaining electrical isolation between domains. Use Value: High drive strength ensures signal integrity across 30-cm backplane traces; hot-insertion support allows field-replacement of I/O cards without powering down the entire system. |
Use Scenario: Extending address/data bus of 8051 or similar 5-V microcontrollers to external memory or peripheral ICs. IC Role / Device Role / Timing Role: Direction-controlled transceiver synchronizing CPU-initiated transfers with external SRAM or UART peripherals. Use Value: Sub-4 ns propagation delay preserves timing margins in 12-MHz+ 8051 systems; 3-state isolation prevents bus contention during interrupt service routines. |
| Automotive Body Control Module Communication | Test Equipment Digital Pattern Generator |
|
Use Scenario: Interfacing MCU-based BCM with legacy CAN/LIN transceivers and discrete sensor drivers on shared 5-V bus. IC Role / Device Role / Timing Role: Signal-level translator and isolator between MCU GPIO and mixed-signal subsystems operating under varying noise conditions. Use Value: 100-mV input hysteresis rejects EMI-induced glitches on DIR/OE control lines; −40°C to +85°C rating meets automotive under-hood requirements. |
Use Scenario: Driving high-capacitance test fixture loads (e.g., 100+ pF) from FPGA-based pattern generators in ATE systems. IC Role / Device Role / Timing Role: Output buffer stage ensuring clean, fast-rising/falling edges into unterminated or lightly terminated test nodes. Use Value: 64-mA sink current maintains <1-V VOL under 50-pF load at 20-MHz toggle rates; SSOP-20 footprint simplifies PCB layout in space-constrained probe cards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT245BDWR | SOIC-20 package (7.5 mm × 5.3 mm), higher thermal resistance (θJA = 58°C/W vs. 70°C/W for DB), identical electrical specs. | Better suited for through-hole prototyping or legacy SOIC footprints; less compact than SSOP but easier hand-soldering. | Select SN74ABT245BDWR if board space permits larger package and manual assembly is required. |
| SN74LVC245A | 3.3-V only operation (1.65–3.6 V), lower drive (−24 mA/24 mA), no Ioff or hot-insertion support, smaller 20-pin TSSOP. | Designed for modern low-voltage systems; lacks robustness for mixed-voltage or hot-swap environments. | Choose SN74LVC245A only for cost-sensitive 3.3-V-only designs where hot insertion and 5-V tolerance are unnecessary. |
Compared with SN74ABT245BDWR and SN74LVC245A, SN74ABT245BDBRG4 uniquely combines 5-V operation, hot-insertion readiness, and SSOP-20 compactness-making it optimal for industrial upgrades requiring backward-compatible 5-V signaling in constrained layouts.
Availability
SN74ABT245BDBRG4 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, legacy microcontroller bus expansion, and automated test equipment requiring stable component supply and long-term manufacturability.
Supply support for SN74ABT245BDBRG4 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 over 90 years of innovation in industrial, automotive, and communications markets.
The SN74ABT245B belongs to TI's ABT logic family, engineered for high-speed, high-drive 5-V TTL-compatible bus interfacing in noise-immune industrial and instrumentation applications.
FAQ
What is the maximum operating temperature range for SN74ABT245BDBRG4?
The SN74ABT245BDBRG4 is rated for operation from −40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in demanding environments such as factory automation controllers and automotive under-dash modules, without requiring thermal derating or forced cooling.
Does SN74ABT245BDBRG4 support hot insertion, and how is it implemented?
Yes, SN74ABT245BDBRG4 supports hot insertion via two integrated features: Ioff circuitry disables outputs when VCC = 0 V (limiting current to ±100 µA), and power-up 3-state holds outputs in high-impedance during VCC ramp-up. These ensure no bus contention or backfeed current occurs when inserting the device into a live 5-V system.
What are the absolute maximum ratings for SN74ABT245BDBRG4 supply voltage and output current?
The absolute maximum supply voltage for SN74ABT245BDBRG4 is −0.5 V to 7 V. Maximum output current is 128 mA per pin in the low state (IOL), and −32 mA in the high state (IOH) under recommended operating conditions. Exceeding these limits risks permanent damage per JEDEC stress guidelines.
How does the DIR input control data flow direction in SN74ABT245BDBRG4?
In SN74ABT245BDBRG4, the DIR input determines bidirectional path direction when OE is low: DIR = high enables data transfer from A bus to B bus; DIR = low enables transfer from B bus to A bus. When OE is high, both ports are isolated regardless of DIR state-ensuring deterministic bus separation.
Is SN74ABT245BDBRG4 pin-compatible with other packages in the SN74ABT245B family?
Yes, all SN74ABT245B variants-including SN74ABT245BDBRG4 (SSOP-20), SN74ABT245BDWR (SOIC-20), and SN74ABT245BPWR (TSSOP-20)-share identical pinout, electrical characteristics, and functional behavior. Only mechanical dimensions and thermal performance differ, allowing direct PCB footprint substitution where package height and layout allow.
SN74ABT245BDBRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-SSOP
SN74ABT245BDBRG4 FAQ
1.How can I place an order for SN74ABT245BDBRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT245BDBRG4 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 SN74ABT245BDBRG4 reliable?
The price and inventory of SN74ABT245BDBRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT245BDBRG4 is usually 5 days.
3.What payment methods are accepted for SN74ABT245BDBRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT245BDBRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT245BDBRG4?
SN74ABT245BDBRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT245BDBRG4 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 SN74ABT245BDBRG4?
For technical support, including SN74ABT245BDBRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT245BDBRG4 requirements.
6.How does Aetrix verify that SN74ABT245BDBRG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT245BDBRG4 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 SN74ABT245BDBRG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT245BDBRG4?
All SN74ABT245BDBRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT245BDBRG4, 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 SN74ABT245BDBRG4 part is unused and in its original packaging.
Return procedure for SN74ABT245BDBRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74ABT245BDBRG4 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…
