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Texas Instruments SN74LV245ADGVR
- Part No.:
- SN74LV245ADGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV245ADGVR.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TVSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74LV245ADGVR from Texas Instruments is an octal bus transceiver with 3-state outputs, designed for bidirectional asynchronous data transfer between voltage domains. It operates from 2 V to 5.5 V, delivers 6.5 ns maximum propagation delay at 5 V, supports mixed-mode I/O (e.g., 5 V inputs with 3.3 V VCC), and features Ioff partial-power-down protection. It is used in LED display column drivers where level translation and bus isolation are required.
For engineers reviewing the SN74LV245ADGVR datasheet, SN74LV245ADGVR pinout, SN74LV245ADGVR application, or SN74LV245ADGVR equivalent, key selection criteria include its 20-pin TVSOP package, 3-state control via DIR/OE pins, ±35 mA output drive capability, ground-bounce immunity (<0.8 V at 3.3 V), and JESD 22-compliant ESD robustness (2000-V HBM).
Technical Context
The SN74LV245ADGVR implements dual-bus bidirectional data flow controlled by a single DIR input and enabled/disabled by OE. Its CMOS design enables down-translation - inputs tolerate up to 5.5 V regardless of VCC, allowing 5 V logic to safely drive a 3.3 V bus. The device uses slow edge-rate control to suppress output ringing and undershoot/overshoot.
It integrates Ioff circuitry that disables outputs during power-down, preventing back-current flow when VCC = 0 V. Thermal performance is characterized by RθJA = 114.8 °C/W (TVSOP), and it meets latch-up immunity >250 mA per JESD 17 and ESD ratings per JESD 22 (2000-V HBM, 1000-V CDM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing without external level shifters. |
| tpd (max) | 6.5 ns at VCC = 5 V, CL = 15 pF - ensures sub-10 ns timing margin for high-speed bus handshaking. |
| Ioff Current | <5 µA at VCC = 0 V - prevents damaging backflow during hot-insertion or partial power-down sequences. |
| Output Drive | ±35 mA per pin - sufficient to drive 50-pF loads across PCB traces or multiple CMOS inputs. |
| ESD Rating (HBM) | 2000 V - exceeds industrial IEC 61000-4-2 system-level surge immunity baseline requirements. |
| VOLP / VOHV | <0.8 V / >2.3 V at VCC = 3.3 V - limits ground bounce and supply undershoot to preserve signal integrity on shared buses. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial motor control, and telecom infrastructure environments. |
Pinout & Package
SN74LV245ADGVR is housed in a 20-pin Thin Very Small Outline Package (TVSOP, DGV), measuring 5.00 mm × 4.40 mm with 0.5 mm lead pitch. This RoHS-compliant, surface-mount package supports automated assembly and offers improved thermal dissipation over standard SOIC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | High = A→B data flow; Low = B→A data flow - enables full-duplex bus arbitration without external logic. |
| OE (Pin 19) | Output enable input | Low = outputs active; High = all A/B ports enter high-impedance state - provides bus isolation during reset or standby. |
| A1–A8 (Pins 2–9) | Port A I/O terminals | Bidirectional data lines tied to one bus segment; tolerate up to 5.5 V regardless of VCC - simplifies 5 V-to-3.3 V interface design. |
| B1–B8 (Pins 11–18) | Port B I/O terminals | Complementary bidirectional data lines for second bus segment; electrically identical to A-side with matched timing. |
| VCC (Pin 20) | Power supply | Single-supply rail powering internal logic and output drivers; bypass capacitor required near pin for noise suppression. |
| GND (Pin 10) | Ground reference | Common return path for all I/O and internal circuitry - must be low-inductance connection to minimize switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage operation | Inputs accept up to 5.5 V while VCC = 2.3 V–3.6 V - eliminates need for discrete level translators in heterogeneous voltage systems. |
| Ioff partial-power-down support | Outputs disable automatically when VCC = 0 V - prevents current backflow into powered subsystems during hot-swap or brownout conditions. |
| Slow edge-rate control | Controlled slew rate minimizes overshoot/undershoot and reduces EMI - critical for clean signal integrity on long PCB traces or ribbon cables. |
| High noise immunity | VIL = 0.3×VCC and VIH = 0.7×VCC thresholds - provides ≥30% noise margin across full VCC range, improving reliability in noisy industrial environments. |
| Thermal robustness | RθJA = 114.8 °C/W (TVSOP) and RθJC(bot) = 56.3 °C/W - enables stable operation at 125°C ambient with minimal derating in compact enclosures. |
Applications
| LED Display Column Driver | Industrial I/O Expander |
|---|---|
|
Use Scenario: Driving 8-bit column segments of multiplexed LED signage using a microcontroller with 3.3 V GPIO and 5 V LED supply rails. IC Role / Device Role / Timing Role: Bidirectional level translator and bus isolator - routes column data from MCU to LED driver IC while blocking reverse current during blanking intervals. Use Value: Eliminates external MOSFET translators; 6.5 ns tpd ensures precise column timing alignment; Ioff prevents latch-up when LED supply remains active during MCU reset. |
Use Scenario: Extending GPIO count of a PLC controller to manage 16 discrete sensors/actuators across two isolated 8-bit buses. IC Role / Device Role / Timing Role: Octal bidirectional buffer with 3-state control - enables time-multiplexed sensor readback and actuator writeback without bus contention. Use Value: ±35 mA drive supports direct connection to 24 V optocoupler inputs; –40°C to 125°C rating ensures operation in uncooled control cabinets; OE pin allows dynamic bus partitioning. |
| Telecom Backplane Interface | Motor Control Logic Isolation |
|
Use Scenario: Interfacing a 3.3 V FPGA management bus to legacy 5 V backplane control signals in network switch line cards. IC Role / Device Role / Timing Role: Voltage-tolerant transceiver - translates FPGA configuration commands to 5 V-compatible CPLD registers while maintaining signal integrity. Use Value: 5.5 V input tolerance avoids clamping diodes; <0.8 V VOLP prevents false logic transitions on shared ground planes; 20-pin TVSOP saves board space vs. SOIC alternatives. |
Use Scenario: Isolating microcontroller PWM outputs from gate-driver ICs in BLDC motor inverters operating at 12 V–48 V bus voltages. IC Role / Device Role / Timing Role: Direction-controlled data coupler - forwards direction and enable signals from MCU to half-bridge drivers while blocking feedback noise. Use Value: Slow edge rates suppress EMI-induced gate oscillation; Ioff protects MCU during power sequencing; 125°C rating matches motor controller thermal envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245A | Lower VCC range (1.65–3.6 V); faster tpd (5.2 ns @ 3.3 V); no 5.5 V input tolerance. | Restricted to single-supply 3.3 V systems; unsuitable for mixed 5 V/3.3 V interfaces. | Select when only 3.3 V operation is needed and higher speed is prioritized over voltage flexibility. |
| 74AVCH245 | Wider VCC (1.2–3.6 V); supports auto-direction sensing; higher drive (±50 mA); different pinout. | Requires redesign for DIR/OE logic; not pin-compatible; better for ultra-low-voltage portable designs. | Choose for battery-powered applications needing sub-1.8 V operation or automatic direction detection. |
Compared with SN74LVC245A and 74AVCH245, the SN74LV245ADGVR uniquely balances wide supply range (2–5.5 V), 5.5 V-tolerant inputs, and industrial temperature support - making it optimal for legacy-to-modern voltage bridging in fixed infrastructure equipment.
Availability
SN74LV245ADGVR is available at Aetrix Electronics and suitable for LED displays, industrial I/O expanders, telecom infrastructure, and motor driver control requiring stable component supply across extended temperature ranges and mixed-voltage designs.
Supply support for SN74LV245ADGVR 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 industrial, automotive, and communications markets.
The SN74LV245ADGVR belongs to TI's LV logic family, engineered for robust voltage translation and noise-immune bus interfacing in harsh industrial and infrastructure applications - emphasizing reliability, wide VCC range, and seamless integration into heterogeneous systems.
FAQ
What is the maximum operating voltage for SN74LV245ADGVR inputs?
The SN74LV245ADGVR inputs tolerate up to 5.5 V regardless of VCC level, enabling safe interfacing between 5 V logic and lower-voltage buses (e.g., 3.3 V or 2.5 V). This overvoltage capability is explicitly specified in the Absolute Maximum Ratings table and applies to all A/B port pins and DIR/OE inputs. The SN74LV245ADGVR does not require external clamping diodes when driven by 5 V sources while operating at 3.3 V VCC.
Does SN74LV245ADGVR support hot-swap or partial-power-down operation?
Yes, the SN74LV245ADGVR incorporates Ioff circuitry that actively disables outputs when VCC = 0 V, limiting off-state current to <5 µA. This prevents damaging back-current flow from live buses into unpowered sections - a critical feature for hot-pluggable modules or systems with staggered power sequencing. The SN74LV245ADGVR maintains this protection across its full –40°C to +125°C operating range.
What is the propagation delay of SN74LV245ADGVR at 3.3 V supply?
At VCC = 3.3 V and CL = 15 pF, the SN74LV245ADGVR exhibits a typical propagation delay (tpd) of 5.9 ns and a maximum of 11 ns over the full –40°C to +125°C temperature range. This value is measured between input transition and output crossing 50% of VCC, per Figure 7-1 load circuit. The SN74LV245ADGVR achieves consistent timing across both A→B and B→A directions due to symmetrical internal architecture.
Can SN74LV245ADGVR be used for unidirectional data transfer?
Yes, the SN74LV245ADGVR supports unidirectional operation by holding DIR constant (e.g., DIR = HIGH for A→B only) while using OE to enable/disable the entire transceiver. In this mode, it functions identically to an octal buffer with 3-state outputs - preserving timing, drive strength, and voltage translation capabilities. The SN74LV245ADGVR requires no hardware modification to operate unidirectionally.
What package type is SN74LV245ADGVR supplied in, and what are its dimensions?
The SN74LV245ADGVR is supplied in a 20-pin Thin Very Small Outline Package (TVSOP, DGV) with body dimensions of 5.00 mm × 4.40 mm and 0.5 mm lead pitch. Its height is ≤1.2 mm, and it features gull-wing leads compatible with standard reflow profiles (MSL Level-1, 260°C peak). The SN74LV245ADGVR's compact footprint reduces PCB area by ~40% versus equivalent SOIC (DW) variants.
SN74LV245ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- 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:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TVSOP
SN74LV245ADGVR FAQ
1.How can I place an order for SN74LV245ADGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV245ADGVR 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 SN74LV245ADGVR reliable?
The price and inventory of SN74LV245ADGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV245ADGVR is usually 5 days.
3.What payment methods are accepted for SN74LV245ADGVR?
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4.How is shipping managed for SN74LV245ADGVR?
SN74LV245ADGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV245ADGVR 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 SN74LV245ADGVR?
For technical support, including SN74LV245ADGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV245ADGVR requirements.
6.How does Aetrix verify that SN74LV245ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74LV245ADGVR 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 SN74LV245ADGVR meets industry standards.
7.What is the process for return or replacement of SN74LV245ADGVR?
All SN74LV245ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV245ADGVR, 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 SN74LV245ADGVR part is unused and in its original packaging.
Return procedure for SN74LV245ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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