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Texas Instruments SN74LVC245AIDBRSV
- Part No.:
- SN74LVC245AIDBRSV
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
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SN74LVC245AIDBRSV.pdf
- Description:
- MOS LOGIC AUTOMOTIVE
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Product details
Overview
SN74LVC245AIDBRSV from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for asynchronous bidirectional data transfer between 1.65-V to 3.6-V buses. It supports mixed-mode I/O (5.5-V-tolerant inputs with 3.3-V VCC), delivers 6.3 ns max propagation delay at 3.3 V, and features Ioff for live insertion and partial-power-down protection - used in LED displays, network switches, and cable modem termination systems.
For engineers reviewing the SN74LVC245AIDBRSV datasheet, SN74LVC245AIDBRSV pinout, SN74LVC245AIDBRSV application, or SN74LVC245AIDBRSV equivalent, key selection criteria include voltage translation capability (5 V ↔ 3.3 V), 20-pin SSOP package compatibility, 3-state output control via DIR/OE, and JESD 17 latch-up immunity exceeding 250 mA.
Technical Context
The SN74LVC245AIDBRSV implements a dual-bus directional transceiver architecture with independent DIR (direction) and OE (output enable) control inputs. Its CMOS design enables bidirectional data flow: when DIR = HIGH, signals propagate A→B; when DIR = LOW, B→A; OE = HIGH forces all outputs into high-impedance state.
It integrates Ioff circuitry that disables outputs during power-down, preventing back-drive current, and accepts input voltages up to 5.5 V regardless of VCC (1.65–3.6 V), enabling robust level-shifting in mixed-voltage systems without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports low-voltage logic domains including 1.8 V, 2.5 V, and 3.3 V systems |
| Input Voltage Tolerance | Up to 5.5 V - enables direct interfacing with 5-V legacy peripherals without level-shifters |
| Max Propagation Delay | 6.3 ns at VCC = 3.3 V - ensures timing compliance in high-speed digital bus applications |
| Ioff Support | Active during power-down - prevents damaging current flow in hot-swap or partial-power-down scenarios |
| Latch-Up Immunity | >250 mA per JESD 17 - guarantees robust operation under transient overcurrent conditions |
| ESD Protection | 2000-V HBM, 1000-V CDM - meets industrial reliability requirements for handling and assembly |
Pinout & Package
SN74LVC245AIDBRSV is packaged in a 20-pin SSOP (DB package), body size 7.50 mm × 5.30 mm, with standard 0.65-mm lead pitch and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Transceiver I/O (Port A) | Bidirectional data pins connected to source bus; driven or sensed depending on DIR state |
| B1–B8 | Transceiver I/O (Port B) | Bidirectional data pins connected to destination bus; directionally coupled to A-port via DIR |
| DIR | Direction Control Input | Active-HIGH: A→B data flow; Active-LOW: B→A data flow - determines signal path polarity |
| OE | Output Enable Input | Active-LOW: enables 3-state outputs; HIGH forces all A/B pins into high-impedance isolation mode |
| VCC | Power Supply | Supplies core logic and output drivers; must be bypassed with 0.1-μF capacitor near pin |
| GND | Ground Reference | Common return path for logic and I/O; requires low-inductance connection to minimize ground bounce |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs with 3.3-V VCC enable seamless integration into heterogeneous voltage systems |
| Live insertion support | Ioff functionality isolates powered-down devices, allowing safe board replacement in active backplanes |
| Low ground bounce (VOLP) | <0.8 V typical at VCC = 3.3 V - reduces noise coupling into shared ground planes |
| Output undershoot suppression (VOHV) | >2 V typical at VCC = 3.3 V - maintains signal integrity during fast edge transitions |
| Wide temperature range | Specified from –40°C to +125°C - suitable for industrial and telecom infrastructure environments |
Applications
| LED Displays | Network Switches |
|---|---|
Use Scenario: Driving column/row lines in large-format outdoor LED signage with long PCB traces and capacitive loads. IC Role / Device Role / Timing Role: Bidirectional bus transceiver buffering and voltage-level shifting between 3.3-V controller and 5-V LED driver ICs. Use Value: 6.3 ns max tpd ensures synchronized pixel updates across 8-bit parallel buses; 5.5-V input tolerance eliminates external level shifters. |
Use Scenario: Interfacing management MCU (3.3 V) with PHY registers and status lines (5 V) in enterprise-grade Ethernet switches. IC Role / Device Role / Timing Role: Isolating and translating control/data signals between mixed-voltage subsystems during configuration and monitoring. Use Value: Ioff protection prevents back-drive damage during PHY hot-plug events; 250 mA latch-up rating withstands transient surges on noisy switch backplanes. |
| Cable Modem Termination | Motor Drivers |
Use Scenario: Signal conditioning between DOCSIS-compliant baseband processor (3.3 V) and legacy analog front-end (5 V) in CMTS line cards. IC Role / Device Role / Timing Role: Direction-controlled data routing for upstream/downstream register access and status reporting. Use Value: DIR/OE dual-control allows dynamic bus arbitration; 2000-V HBM ESD rating sustains repeated field service handling. |
Use Scenario: Level-shifting PWM and fault feedback signals between 3.3-V microcontroller and 5-V gate-driver ICs in BLDC motor control modules. IC Role / Device Role / Timing Role: Bidirectional interface for real-time current sensing, enable/disable commands, and thermal alerts. Use Value: 3-state isolation during motor stall or fault conditions prevents bus contention; VOLP <0.8 V minimizes false triggering in noisy motor drive environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVCH245A | Includes bus-hold circuitry on all I/O pins; otherwise identical VCC range, speed, and pinout | Eliminates need for external pull-up/down resistors on unused or floating bus lines | Preferred where input stability is critical and board space for discrete biasing is constrained |
| 74LVC245ADW | Same electrical specs but in SOIC-20 package (12.80 mm × 7.50 mm); larger footprint, through-hole compatible | Suitable for prototyping, legacy designs, or applications requiring mechanical robustness over density | Select when SSOP reflow constraints exist or manual assembly is required |
Compared with SN74LVC245AIDBRSV, SN74LVCH245A adds bus-hold for floating-input resilience, while 74LVC245ADW trades SSOP compactness for SOIC manufacturability - both retain full functional and timing equivalence for drop-in use in non-bus-hold or through-hole contexts.
Availability
SN74LVC245AIDBRSV is available at Aetrix Electronics and suitable for LED display interfaces, network switch control planes, and cable modem termination systems requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for SN74LVC245AIDBRSV 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 experience in logic interface solutions.
The SN74LVC245AIDBRSV belongs to TI's LVC (Low-Voltage CMOS) logic family, engineered for high-speed, low-power bidirectional bus interfacing in mixed-voltage digital systems from consumer to industrial infrastructure.
FAQ
What is the operating voltage range for SN74LVC245AIDBRSV?
The SN74LVC245AIDBRSV operates from 1.65 V to 3.6 V on VCC, with input tolerance up to 5.5 V across all pins. This allows reliable interfacing between 1.8-V, 2.5-V, and 3.3-V logic domains while accepting 5-V signals - a key feature confirmed in TI's SCAS218X datasheet Section 7.3.
Does SN74LVC245AIDBRSV support hot-swap or live insertion?
Yes, SN74LVC245AIDBRSV supports live insertion via its Ioff circuitry, which disables outputs and blocks current backflow when VCC = 0 V. This protects downstream components during partial-power-down or board replacement - explicitly documented in Section 1 Features and Section 9.1 Overview of the datasheet.
What is the maximum propagation delay of SN74LVC245AIDBRSV at 3.3 V?
The maximum propagation delay (tpd) of SN74LVC245AIDBRSV is 6.3 ns at VCC = 3.3 V and TA = 25°C, as specified in Section 7.6 Switching Characteristics. This value applies to both A→B and B→A directions under recommended load conditions.
How does the DIR pin control data flow in SN74LVC245AIDBRSV?
In SN74LVC245AIDBRSV, the DIR pin determines direction: when DIR = HIGH, data flows from Port A to Port B; when DIR = LOW, data flows from Port B to Port A. This behavior is defined in Table 1 (Function Table) in Section 9.4 of the datasheet and is independent of OE state.
Is SN74LVC245AIDBRSV pin-compatible with other packages of the same part number?
Yes, SN74LVC245AIDBRSV shares identical pinout and functionality with all 20-pin variants (e.g., SOIC DW, TSSOP PW, VQFN RGY), as confirmed in the Device Information table (Section 3) and Pin Configuration diagram (Section 6). Only package dimensions and thermal metrics differ.
SN74LVC245AIDBRSV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LVC245AIDBRSV FAQ
1.How can I place an order for SN74LVC245AIDBRSV through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC245AIDBRSV 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 SN74LVC245AIDBRSV reliable?
The price and inventory of SN74LVC245AIDBRSV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC245AIDBRSV is usually 5 days.
3.What payment methods are accepted for SN74LVC245AIDBRSV?
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4.How is shipping managed for SN74LVC245AIDBRSV?
SN74LVC245AIDBRSV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC245AIDBRSV 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 SN74LVC245AIDBRSV?
For technical support, including SN74LVC245AIDBRSV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC245AIDBRSV requirements.
6.How does Aetrix verify that SN74LVC245AIDBRSV is sourced from the original manufacturer or authorized distributors?
All SN74LVC245AIDBRSV 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 SN74LVC245AIDBRSV meets industry standards.
7.What is the process for return or replacement of SN74LVC245AIDBRSV?
All SN74LVC245AIDBRSV units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC245AIDBRSV, 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 SN74LVC245AIDBRSV part is unused and in its original packaging.
Return procedure for SN74LVC245AIDBRSV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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