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Texas Instruments SN74LVC245APWRG4
- Part No.:
- SN74LVC245APWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC245APWRG4.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,622
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Product details
Overview
SN74LVC245APWRG4 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 signal operation (5-V inputs with 3.3-V VCC), features Ioff for live insertion and partial-power-down protection, and delivers max tpd of 6.3 ns at 3.3 V - used in LED displays, network switches, and I/O expanders.
For engineers reviewing the SN74LVC245APWRG4 datasheet, SN74LVC245APWRG4 pinout, SN74LVC245APWRG4 application, or SN74LVC245APWRG4 equivalent, key selection criteria include voltage translation capability (5 V ↔ 3.3 V), 3-state output isolation timing (ten/tdis ≤ 8.5 ns), Ioff-enabled back-drive protection, and TSSOP-20 package compatibility with industrial temperature range (–40°C to 125°C).
Technical Context
The SN74LVC245APWRG4 implements a direction-controlled bidirectional buffer architecture: DIR input selects A→B (high) or B→A (low) data flow, while OE enables/disables all eight channels simultaneously into high-impedance state. Its CMOS design ensures rail-to-rail input tolerance up to 5.5 V independent of VCC, enabling robust level-shifting in mixed-voltage systems.
It integrates Ioff circuitry that disables outputs during power-down, preventing current backflow when VCC = 0 V, and meets JESD 17 latch-up immunity (>250 mA). Electrical behavior is characterized across –40°C to 125°C, with guaranteed VOL ≤ 0.6 V and VOH ≥ VCC – 0.2 V at IOL = 24 mA / IOH = –24 mA (VCC = 3.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation across 1.8-V, 2.5-V, and 3.3-V logic domains. |
| Input Voltage Tolerance | Up to 5.5 V - enables direct interfacing with 5-V legacy peripherals without external level shifters. |
| Max Propagation Delay | 6.3 ns at VCC = 3.3 V - ensures sub-8-ns timing margin for high-speed bus arbitration in telecom infrastructure. |
| Ioff Current | ±10 μA at VI/VO = 5.5 V - guarantees safe hot-plug operation and prevents damage during partial power-down. |
| Output Drive Strength | ±24 mA per channel at VCC = 3.0 V - drives 50-Ω transmission lines or multiple CMOS loads without buffering. |
| ESD Rating | 2000-V HBM, 1000-V CDM - exceeds JEDEC standards for manufacturing and field reliability in industrial environments. |
Pinout & Package
TSSOP-20 package (PW), body size 6.50 mm × 4.40 mm, moisture sensitivity level 1 (260°C peak reflow, unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | High = A→B data flow; low = B→A - determines real-time bus direction without reset or configuration registers. |
| 19 (OE) | Output enable input | Low = active transceiver; high = all eight outputs enter high-Z - enables bus sharing and conflict-free multi-master arbitration. |
| 2–9 (A1–A8) | Port A I/O terminals | Bidirectional data pins on A-side - tolerate 0–5.5 V inputs regardless of VCC, supporting mixed-voltage interface. |
| 11–18 (B1–B8) | Port B I/O terminals | Bidirectional data pins on B-side - electrically identical to A-side, enabling symmetrical bus coupling. |
| 10 (GND) | Ground reference | Primary return path for all I/O and supply currents - requires low-inductance connection to minimize ground bounce (VOLP < 0.8 V). |
| 20 (VCC) | Power supply | Single supply for core logic and I/O - bypassing with 0.1-μF capacitor near pin essential for stable 6.3-ns switching performance. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs with 3.3-V VCC enable direct connection to legacy 5-V microcontrollers or FPGAs without external translators. |
| Ioff partial-power-down support | Active output disable at VCC = 0 V prevents back-current flow during hot-swap or system sleep modes - critical for server backplanes. |
| Low ground bounce (VOLP) | Typical < 0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent analog or RF circuits on shared PCBs. |
| Fast enable/disable timing | ten ≤ 8.5 ns and tdis ≤ 8.5 ns at VCC = 3.3 V - allows dynamic bus isolation within tight real-time control loops. |
| Latch-up immunity | Exceeds 250 mA per JESD 17 - ensures robustness against transient overcurrent events in motor driver I/O staging. |
Applications
| LED Display Driver Interface | Network Switch Data Bus Isolation |
|---|---|
Use Scenario: Driving multiplexed 7-segment or dot-matrix LED panels from a 3.3-V MCU while sourcing sink current up to 24 mA per segment. IC Role / Device Role / Timing Role: Bidirectional level-translating buffer that isolates MCU GPIOs from high-current LED loads and enables 5-V display module compatibility. Use Value: Eliminates discrete MOSFET arrays or dedicated LED drivers; leverages ±24 mA drive strength and 5.5-V input tolerance to directly interface with common-anode/cathode displays. |
Use Scenario: Arbitrating between two independent Ethernet PHY data paths on a managed switch ASIC evaluation board. IC Role / Device Role / Timing Role: Asynchronous bus transceiver providing direction-controlled, 3-state-isolated data coupling between MAC and PHY layers. Use Value: Enables deterministic latency (tpd ≤ 6.3 ns) and glitch-free bus handover via DIR/OE control - critical for IEEE 802.3 compliance testing. |
| Industrial I/O Expander Backplane | Telecom Baseband Signal Routing |
Use Scenario: Extending GPIO count of a PLC controller via isolated RS-485 or CAN bus nodes using modular I/O cards. IC Role / Device Role / Timing Role: Voltage-translating bus repeater that bridges 1.8-V FPGA I/O banks to 3.3-V sensor/actuator modules. Use Value: Ioff protection prevents damage during card hot-insertion; 5-V-tolerant inputs accept direct connection to legacy 24-V optocoupler interfaces. |
Use Scenario: Routing baseband I/Q signals between ADC/DAC and DSP in a 5G small cell radio unit operating at –40°C to 125°C. IC Role / Device Role / Timing Role: Low-jitter, bidirectional data conduit between mixed-voltage analog front-end and digital processing subsystems. Use Value: Guaranteed operation across full industrial temperature range with <0.8 V ground bounce minimizes EMI impact on sensitive RF sections. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWRE4 | Same electrical specs and TSSOP-20 package; lead finish is NIPDAU (vs. NIPDAU in SN74LVC245APWRG4), identical MSL-1 rating. | No functional difference; E4 suffix indicates TI's standard green RoHS-compliant finish - suitable for same industrial and telecom use cases. | Select SN74LVC245APWRE4 if standard TI green finish is required; both share identical thermal, timing, and voltage characteristics. |
| 74LVC245ADTR2G (ON Semiconductor) | Pin-compatible TSSOP-20; VCC range 1.65–3.6 V, but max tpd = 7.5 ns at 3.3 V (vs. 6.3 ns); Ioff = ±20 μA (vs. ±10 μA). | Slightly slower propagation and higher off-state leakage - acceptable for non-critical timing applications like LED signage, not recommended for sub-7-ns switch arbitration. | Choose only where 1.2-ns timing margin is acceptable; verify Ioff compliance in hot-swap systems requiring <±10 μA leakage. |
Compared with SN74LVC245APWRE4 (identical performance, alternate finish) and 74LVC245ADTR2G (slower timing, higher Ioff leakage), SN74LVC245APWRG4 offers optimal balance of speed, low-leakage Ioff, and TI-qualified NIPDAU finish for high-reliability industrial deployments.
Availability
SN74LVC245APWRG4 is available at Aetrix Electronics and suitable for LED displays, network switches, and industrial I/O expanders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LVC245APWRG4 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, precision, and energy efficiency.
The SN74LVC245A product line targets voltage-level translation and bidirectional bus isolation in mixed-signal industrial, telecom, and computing systems - engineered for interoperability across 1.65–3.6-V logic families with robust ESD and latch-up immunity.
FAQ
What is the maximum operating temperature range for SN74LVC245APWRG4?
The SN74LVC245APWRG4 is fully specified from –40°C to +125°C ambient temperature. This industrial-grade rating is validated across all electrical parameters including propagation delay, output drive, and Ioff leakage - making SN74LVC245APWRG4 suitable for under-hood automotive modules, base station radios, and factory automation controllers where thermal stress is critical.
Does SN74LVC245APWRG4 support 5-V input signals when powered at 3.3 V?
Yes, SN74LVC245APWRG4 accepts input voltages up to 5.5 V regardless of VCC level (1.65–3.6 V). This 5-V-tolerant input capability is intrinsic to its LVC process and enables direct interfacing with 5-V microcontrollers, sensors, or legacy peripherals without external level shifters - a confirmed feature documented in Section 9.3 of the TI datasheet SCAS218X.
How does the Ioff feature protect SN74LVC245APWRG4 during live insertion?
The Ioff circuitry in SN74LVC245APWRG4 actively disables all outputs when VCC = 0 V, limiting input/output leakage to ±10 μA even with 5.5-V signals applied. This prevents damaging back-current flow through the device during hot-swap events - a requirement verified per JESD 78 and explicitly tested in TI's production qualification for SN74LVC245APWRG4.
What is the typical propagation delay of SN74LVC245APWRG4 at 3.3 V?
The typical propagation delay (tpd) of SN74LVC245APWRG4 is 3.8 ns at VCC = 3.3 V ± 0.3 V, with a maximum of 6.3 ns across –40°C to 125°C. These values are measured under loaded conditions (CL = 50 pF) and reflect worst-case A↔B or B↔A signal path delay - critical for timing closure in high-speed bus designs using SN74LVC245APWRG4.
Is SN74LVC245APWRG4 pin-compatible with other packages of the SN74LVC245A family?
Yes, SN74LVC245APWRG4 (TSSOP-20) shares identical pinout and function mapping with all other 20-pin variants including SOIC (DW), SSOP (DB), TVSOP (DGV), and VQFN (RGY) packages. Pin numbers 1 (DIR), 19 (OE), 2–9 (A1–A8), 11–18 (B1–B8), 10 (GND), and 20 (VCC) are functionally and physically aligned across all SN74LVC245A orderables per TI's Pin Configuration and Functions table.
SN74LVC245APWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 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
SN74LVC245APWRG4 FAQ
1.How can I place an order for SN74LVC245APWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC245APWRG4 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 SN74LVC245APWRG4 reliable?
The price and inventory of SN74LVC245APWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC245APWRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC245APWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC245APWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC245APWRG4?
SN74LVC245APWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC245APWRG4 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 SN74LVC245APWRG4?
For technical support, including SN74LVC245APWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC245APWRG4 requirements.
6.How does Aetrix verify that SN74LVC245APWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC245APWRG4 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 SN74LVC245APWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC245APWRG4?
All SN74LVC245APWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC245APWRG4, 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 SN74LVC245APWRG4 part is unused and in its original packaging.
Return procedure for SN74LVC245APWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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