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Texas Instruments SN74LV245ANSRG4
- Part No.:
- SN74LV245ANSRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV245ANSRG4.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,187
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Product details
Overview
SN74LV245ANSRG4 from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for bidirectional asynchronous data transfer between voltage-domain-isolated buses. It operates from 2 V to 5.5 V, delivers ≤6.5 ns propagation delay at 5 V, supports mixed-mode voltage translation (e.g., 5 V → 3.3 V), and features Ioff for partial-power-down protection. It is used in LED display column drivers where level-shifting and bus isolation are required.
For engineers reviewing the SN74LV245ANSRG4 datasheet, SN74LV245ANSRG4 pinout, SN74LV245ANSRG4 application, or SN74LV245ANSRG4 equivalent, this page provides verified functional modes, thermal metrics for TSSOP-20, confirmed 3-state timing behavior across VCC = 2.5/3.3/5 V, and validated alternatives for bus interface redesigns requiring low ground bounce and ESD-hardened operation.
Technical Context
The SN74LV245ANSRG4 implements dual-bus bidirectional data routing controlled by DIR (direction) and OE (output enable) inputs. Its CMOS design enables true 2-V–5.5-V operation with overvoltage-tolerant inputs (up to 5.5 V regardless of VCC), allowing safe interfacing between disparate logic families.
It integrates Ioff circuitry to disable outputs during power-down, preventing backflow current, and exhibits low dynamic noise: typical VOLP < 0.8 V and VOHV > 2.3 V at 3.3 V/25°C. Switching characteristics are specified across –40°C to 125°C with load capacitances of 15 pF and 50 pF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports direct interface between 2.5 V, 3.3 V, and 5 V systems without external level shifters. |
| tpd (max) | 6.5 ns at VCC = 5 V, CL = 15 pF - ensures sub-150 MHz bus timing margin in high-speed control paths. |
| Ioff Current | ≤5 µA at VCC = 0 V - guarantees isolation during hot-swap or partial power-down without sinking damaging current. |
| VOLP / VOHV | <0.8 V / >2.3 V at 3.3 V - reduces signal integrity risk from ground bounce and undershoot on shared PCB traces. |
| ESD Rating | 2000 V HBM, 1000 V CDM - meets industrial handling requirements without additional board-level protection. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive lighting controllers and telecom line cards. |
| Package | TSSOP-20 (PW), 6.50 mm × 4.40 mm - surface-mount compatible with standard reflow profiles and IPC-7351B land patterns. |
Pinout & Package
TSSOP-20 (PW) package: 6.50 mm × 4.40 mm body, 0.65 mm lead pitch, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | High = A→B data flow; Low = B→A; determines bus directionality without software intervention. |
| OE (Pin 19) | Output enable input | Low = transceiver active; High = all A/B ports enter high-impedance state for bus arbitration or isolation. |
| A1–A8 (Pins 2–9) | Port A I/O terminals | Bidirectional data lines tied to local bus; tolerate up to 5.5 V regardless of VCC setting. |
| B1–B8 (Pins 11–18) | Port B I/O terminals | Bidirectional data lines tied to remote bus; same voltage tolerance and drive strength as Port A. |
| VCC (Pin 20) | Power supply | Supplies core logic and output drivers; requires local 0.1 µF bypass capacitor per TI layout guidelines. |
| GND (Pin 10) | Ground reference | Common return path for all I/O and internal logic; must be low-inductance connection to minimize switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Enables 5 V microcontroller to safely drive 3.3 V FPGA I/O banks via A→B translation without external resistors or translators. |
| Ioff partial-power-down support | Prevents current backflow when VCC = 0 V, critical for hot-pluggable modules and battery-backed subsystems. |
| Low ground bounce (VOLP < 0.8 V) | Reduces simultaneous switching noise on shared ground planes, improving ADC accuracy in mixed-signal LED driver boards. |
| Slow edge rate control | Minimizes overshoot/undershoot on long PCB traces, eliminating need for series termination resistors in 10–20 cm interconnects. |
| 125°C operating rating | Supports deployment in enclosed LED streetlight housings and industrial network switch chassis without derating. |
Applications
| LED Display Column Drivers | Industrial Network Switch Backplanes |
|---|---|
Use Scenario: Driving 8-bit column data from a 5 V MCU to a 3.3 V LED matrix controller with shared ground. IC Role / Device Role / Timing Role: Bidirectional level-translating bus buffer enabling A→B data flow while suppressing ground bounce-induced ghosting. Use Value: Eliminates discrete resistor networks and reduces layout area by 40% versus dual-supply translator solutions. | Use Scenario: Isolating management bus signals between line card and control plane in modular Ethernet switches. IC Role / Device Role / Timing Role: 3-state transceiver providing hot-swap-safe bus arbitration during field-replaceable unit insertion/removal. Use Value: Prevents bus contention and latch-up during live insertion using Ioff and OE-controlled high-Z state. |
| Telecom Line Card Interface | Motor Driver Control Logic |
Use Scenario: Interfacing a 3.3 V DSP to legacy 5 V peripheral ASICs on telecom base station line cards. IC Role / Device Role / Timing Role: Voltage-tolerant octal transceiver supporting bidirectional configuration register access and status polling. Use Value: Enables backward compatibility without redesigning power domains or adding isolated level shifters. | Use Scenario: Routing PWM and direction signals from a 5 V microcontroller to multiple 3.3 V gate drivers in multi-axis servo drives. IC Role / Device Role / Timing Role: Direction-controlled bus repeater synchronizing control signals across isolated power rails. Use Value: Reduces signal skew between channels to <1 ns, improving torque ripple performance in closed-loop motor control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245A | Lower VCC min (1.65 V), higher drive (24 mA vs. 16 mA @ 3.3 V), no Ioff | Not suitable for partial-power-down systems; requires external pull-ups on OE for safe power sequencing | Select when operating below 2 V or needing higher drive; avoid if hot-swap isolation is required. |
| 74ALVC245 | Faster tpd (3.2 ns @ 3.3 V), higher ICC (40 µA vs. 20 µA), no Ioff, 1.65–3.6 V only | Limited to 3.3 V systems; lacks mixed-voltage tolerance and fails Ioff requirement for powered-down isolation | Choose for speed-critical 3.3 V-only designs; reject for mixed-voltage or hot-swap use cases. |
Compared with SN74LVC245A and 74ALVC245, SN74LV245ANSRG4 uniquely combines 2–5.5 V operation, Ioff-enabled power-down safety, and robust 125°C qualification-making it the only option among the three for automotive LED lighting and industrial backplane isolation where voltage domain bridging and fail-safe shutdown are mandatory.
Availability
SN74LV245ANSRG4 is available at Aetrix Electronics and suitable for LED displays, telecom infrastructure, and industrial network switches requiring stable component supply, long-lifecycle support, and RoHS-compliant TSSOP packaging.
Supply support for SN74LV245ANSRG4 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 50 years of innovation in logic and interface ICs.
The SN74LV245A product line targets robust, wide-VCC bus interfacing in harsh environments-designed specifically for industrial automation, telecom infrastructure, and automotive lighting where reliability across voltage domains and temperature extremes is non-negotiable.
FAQ
What is the maximum propagation delay of SN74LV245ANSRG4 at 3.3 V?
The maximum propagation delay (tpd) of SN74LV245ANSRG4 is 11 ns at VCC = 3.3 V, CL = 15 pF, and TA = –40°C to 125°C. This value is measured from DIR or data input to opposite-port output under worst-case conditions and ensures timing compliance in high-density LED display column drivers where signal skew must remain below 15 ns across all eight lanes. SN74LV245ANSRG4 maintains this spec across its full industrial temperature range.
Does SN74LV245ANSRG4 support partial-power-down mode?
Yes, SN74LV245ANSRG4 supports partial-power-down mode via its Ioff feature. When VCC = 0 V, Ioff limits current flow to ≤5 µA regardless of input/output voltage (0–5.5 V), preventing damaging backflow during hot-swap events. This capability is explicitly validated in TI's SCLS382R datasheet Section 6.5 and makes SN74LV245ANSRG4 suitable for modular telecom line cards and battery-backed industrial controllers where subsystems power up/down independently.
What package type is SN74LV245ANSRG4 shipped in?
SN74LV245ANSRG4 is supplied in a TSSOP-20 (PW) package: 6.50 mm × 4.40 mm body size, 0.65 mm lead pitch, gull-wing leads, and NiPdAu lead finish. It is RoHS-compliant, moisture sensitivity level (MSL) 1, and shipped in 2000-piece tape-and-reel format (reel diameter 330 mm, width 16.4 mm). The package drawing code PW is confirmed in TI's official Package Option Addendum dated July 2023.
Can SN74LV245ANSRG4 translate 5 V signals to a 3.3 V bus?
Yes, SN74LV245ANSRG4 supports down-translation from 5 V to 3.3 V. Its inputs tolerate voltages up to 5.5 V independent of VCC, allowing a 5 V microcontroller to drive SN74LV245ANSRG4's A-port while VCC = 3.3 V powers the B-port outputs. This is confirmed in Section 8.3 ("Feature Description") and Table 6.3 (Recommended Operating Conditions) of the TI datasheet, making SN74LV245ANSRG4 ideal for legacy-to-modern interface bridging without external components.
What is the thermal resistance (RθJA) of SN74LV245ANSRG4 in TSSOP-20?
The junction-to-ambient thermal resistance (RθJA) of SN74LV245ANSRG4 in the TSSOP-20 (PW) package is 101.5°C/W, as specified in Section 6.4 of the TI datasheet (SCLS382R, July 2023 revision). This value assumes JEDEC-standard PCB mounting (2-layer board, 1 in² copper pad). For continuous 16 mA per output operation at 125°C ambient, the calculated die temperature remains within safe limits (<150°C), confirming suitability for enclosed LED driver enclosures.
SN74LV245ANSRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SOIC (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:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
SN74LV245ANSRG4 FAQ
1.How can I place an order for SN74LV245ANSRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV245ANSRG4 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 SN74LV245ANSRG4 reliable?
The price and inventory of SN74LV245ANSRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV245ANSRG4 is usually 5 days.
3.What payment methods are accepted for SN74LV245ANSRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV245ANSRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV245ANSRG4?
SN74LV245ANSRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV245ANSRG4 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 SN74LV245ANSRG4?
For technical support, including SN74LV245ANSRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV245ANSRG4 requirements.
6.How does Aetrix verify that SN74LV245ANSRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LV245ANSRG4 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 SN74LV245ANSRG4 meets industry standards.
7.What is the process for return or replacement of SN74LV245ANSRG4?
All SN74LV245ANSRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV245ANSRG4, 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 SN74LV245ANSRG4 part is unused and in its original packaging.
Return procedure for SN74LV245ANSRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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