My Inquiry
My Account
Texas Instruments SN74LVC245APW
- Part No.:
- SN74LVC245APW
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC245APW.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,351
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC245APW from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for bidirectional asynchronous data bus communication between 1.65-V and 3.6-V logic domains. It features direction control (DIR), output enable (OE), 8 A-side and 8 B-side I/O channels, 6.3 ns max propagation delay at 3.3 V, and 5.5-V tolerant inputs - enabling use in mixed-voltage systems such as 5-V microcontroller interfacing to 3.3-V peripherals.
For engineers reviewing the SN74LVC245APW datasheet, SN74LVC245APW pinout, SN74LVC245APW application, or SN74LVC245APW equivalent, key selection criteria include voltage translation capability (5 V ↔ 3.3 V), Ioff support for live insertion, 3-state isolation timing (ten/tdis), and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The SN74LVC245APW implements a dual-bus, direction-controllable transceiver architecture with independent DIR and OE inputs. Its CMOS design supports true bidirectional data flow: when DIR = HIGH, data propagates A→B; when DIR = LOW, data flows B→A. OE asserts high-impedance on both A and B ports when HIGH, isolating buses completely.
It incorporates Ioff circuitry that disables outputs during partial power-down, preventing back-drive current when VCC = 0 V while inputs remain at 5.5 V. Input tolerance up to 5.5 V across the full 1.65–3.6-V VCC range enables robust level-shifting without external components - verified for 5-V-to-3.3-V and 5-V/3.3-V-to-1.8-V translation per TI's Feature Description section.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports operation across low-voltage embedded rails including 1.8 V, 2.5 V, and 3.3 V systems |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5-V logic without clamping diodes or level-shifters |
| Max Propagation Delay | 6.3 ns at VCC = 3.3 V - ensures timing compliance in high-speed bus interfaces up to ~80 MHz |
| Ioff Support | Active at VCC = 0 V - enables hot-plug and partial-power-down system designs without latch-up risk |
| ESD Rating | 2000 V HBM, 1000 V CDM - meets industrial-grade ESD robustness requirements per JESD22 |
| Output Drive | ±24 mA at VCC = 3.0 V - sufficient to drive moderate capacitive loads and longer PCB traces |
| Operating Temperature | –40°C to +125°C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
TSSOP-20 (PW) package: 6.50 mm × 4.40 mm body, 0.65 mm lead pitch, surface-mount, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction Control Input | Logic HIGH enables A→B data flow; LOW enables B→A - determines real-time bus directionality |
| 2–9 (A1–A8) | A-Side I/O Port | Bidirectional data pins connected to first bus domain; tolerate up to 5.5 V regardless of VCC |
| 10 (GND) | Ground Reference | Primary return path for all internal logic and I/O - must be low-inductance for noise immunity |
| 11–18 (B1–B8) | B-Side I/O Port | Bidirectional data pins connected to second bus domain; electrically identical to A-side pins |
| 19 (OE) | Output Enable Input | Active-LOW control: LOW enables transceiver; HIGH places all A/B pins in high-impedance state |
| 20 (VCC) | Power Supply | Single supply input for core logic and I/O - bypass capacitor required per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | Enables interoperability between 5-V, 3.3-V, and 1.8-V logic families on same device without external translators |
| Live insertion support via Ioff | Prevents damaging back-current when board is partially powered - critical for modular backplane systems |
| Low ground bounce (VOLP < 0.8 V) | Reduces switching noise coupling into shared ground planes - improves signal integrity in dense layouts |
| High noise immunity (VOHV > 2 V) | Minimizes false triggering from transient overshoot on output lines - enhances reliability in noisy environments |
| Latch-up immunity > 250 mA | Guarantees robustness against accidental overvoltage or ESD-induced latch-up per JESD17 |
Applications
| Industrial PLC Backplanes | Automotive Body Control Modules |
|---|---|
Use Scenario: Isolating and translating signals between legacy 5-V sensor interfaces and modern 3.3-V MCU subsystems within programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus transceiver managing data flow between isolated voltage domains with precise direction and enable control. Use Value: Eliminates need for discrete level shifters; supports hot-swap maintenance via Ioff; meets extended temperature and ESD requirements. |
Use Scenario: Interfacing 5-V CAN transceiver logic levels with 3.3-V microcontroller GPIO banks in body electronics gateways. IC Role / Device Role / Timing Role: Voltage-tolerant transceiver enabling safe, low-latency communication across mixed-supply domains without timing skew. Use Value: 6.3 ns tpd ensures CAN FD timing margins; 5.5-V input tolerance prevents damage from bus transients; –40°C to 125°C rating matches under-hood specs. |
| LED Display Driver Interfaces | Network Switch Management Buses |
Use Scenario: Driving column/row address lines of high-density LED matrices where 5-V display drivers connect to 3.3-V FPGA controllers. IC Role / Device Role / Timing Role: High-drive transceiver buffering and translating control signals with minimal propagation delay and clean edge integrity. Use Value: ±24 mA drive strength sustains signal integrity over long traces; low VOLP/VOHV reduces flicker and ghosting artifacts. |
Use Scenario: Isolating I²C or SPI management buses between 5-V power management ICs and 3.3-V switch fabric controllers in enterprise switches. IC Role / Device Role / Timing Role: 3-state enabled bus buffer providing electrical isolation and voltage translation during firmware updates or fault conditions. Use Value: OE-controlled high-Z state prevents bus contention during reconfiguration; Ioff protects powered-down sections during hot-swap events. |
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/Os; otherwise identical voltage range, speed, and pinout | Eliminates need for external pull-up/down resistors on unused or floating bus lines | Preferred when bus stability during idle states is critical and board space for resistors is constrained |
| 74LVC245ADW | SOIC-20 package (12.8 mm × 7.5 mm); same electrical specs but larger footprint and higher thermal resistance (RθJA = 78°C/W vs. 83.6°C/W) | Suitable for prototyping or legacy through-hole-compatible designs requiring manual soldering | Select when TSSOP assembly infrastructure is unavailable or thermal margin is less critical than mechanical compatibility |
Compared with SN74LVC245APW, SN74LVCH245A adds bus-hold functionality for enhanced noise immunity on unterminated lines, while 74LVC245ADW trades compact TSSOP packaging for SOIC's ease of hand-soldering and lower cost in low-volume builds - neither offers pin-to-pin replacement without layout revision.
Availability
SN74LVC245APW is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, LED display driver interfaces, and network switch management buses requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for SN74LVC245APW 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 SN74LVC245A product line delivers robust, voltage-tolerant bus transceivers optimized for mixed-signal interoperability in industrial automation, automotive electronics, and communications infrastructure.
FAQ
What is the maximum operating voltage on the inputs of the SN74LVC245APW?
The SN74LVC245APW inputs accept voltages up to 5.5 V regardless of VCC level - verified across the full 1.65–3.6-V supply range. This overvoltage tolerance enables direct interfacing with 5-V logic families without external protection or translation circuitry, as confirmed in Section 7.3 (Recommended Operating Conditions) and Feature Description of the datasheet.
Does the SN74LVC245APW support hot-plug or live-insertion applications?
Yes, the SN74LVC245APW supports live insertion via its Ioff feature, which disables outputs and blocks current backflow when VCC = 0 V while inputs remain at up to 5.5 V. This behavior is explicitly specified in the Feature list and Detailed Description sections, making SN74LVC245APW suitable for modular backplane and hot-swap systems.
What is the propagation delay of the SN74LVC245APW at 3.3 V?
The SN74LVC245APW has a maximum propagation delay (tpd) of 6.3 ns at VCC = 3.3 V ± 0.3 V, as specified in Table 7.6 (Switching Characteristics). Typical tpd is 3.8 ns under the same conditions, supporting reliable operation in synchronous bus systems with clock periods ≥12.6 ns.
Can the SN74LVC245APW translate between 5-V and 1.8-V logic levels?
Yes, the SN74LVC245APW supports down-translation from 5 V to 1.8 V, as documented in Section 9.3 (Feature Description), which lists "5 V or 3.3 V to 1.8 V" as a supported configuration. Inputs tolerate 5.5 V at any valid VCC, and outputs swing rail-to-rail relative to the applied VCC - enabling safe, functional level shifting without external components.
What package type is used for the SN74LVC245APW?
The SN74LVC245APW uses a TSSOP-20 (PW) package measuring 6.50 mm × 4.40 mm with 0.65 mm lead pitch. This information is confirmed in the Package Option Addendum and Mechanical, Packaging, and Orderable Information section, where SN74LVC245APW is explicitly listed as "TSSOP (PW) | 20".
SN74LVC245APW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVC245APW FAQ
1.How can I place an order for SN74LVC245APW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC245APW 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 SN74LVC245APW reliable?
The price and inventory of SN74LVC245APW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC245APW is usually 5 days.
3.What payment methods are accepted for SN74LVC245APW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC245APW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC245APW?
SN74LVC245APW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC245APW 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 SN74LVC245APW?
For technical support, including SN74LVC245APW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC245APW requirements.
6.How does Aetrix verify that SN74LVC245APW is sourced from the original manufacturer or authorized distributors?
All SN74LVC245APW 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 SN74LVC245APW meets industry standards.
7.What is the process for return or replacement of SN74LVC245APW?
All SN74LVC245APW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC245APW, 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 SN74LVC245APW part is unused and in its original packaging.
Return procedure for SN74LVC245APW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC245APW 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…
