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Texas Instruments SN74LV245APWRG3
- Part No.:
- SN74LV245APWRG3
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LV245APWRG3.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
SN74LV245APWRG3 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 I/O (e.g., 5 V inputs into 3.3 V system), and features Ioff partial-power-down protection. It is used in LED display column drivers where level-shifting and bus isolation are required.
For engineers reviewing the SN74LV245APWRG3 datasheet, SN74LV245APWRG3 pinout, SN74LV245APWRG3 application, or SN74LV245APWRG3 equivalent, key selection criteria include its 20-pin TSSOP (PW) package, direction-controlled bidirectional flow, 35 mA per-output drive capability, and guaranteed operation across –40°C to +125°C industrial temperature range.
Technical Context
The SN74LV245APWRG3 implements a dual-bus transceiver architecture with DIR-controlled signal directionality and OE-gated 3-state output control. Its CMOS design enables overvoltage-tolerant inputs (up to 5.5 V regardless of VCC), allowing reliable down-translation (e.g., 5 V → 3.3 V). The device uses slow-edge-rate outputs to suppress ringing on lightly loaded traces.
It integrates Ioff circuitry that disables all outputs during power-down, preventing back-current flow when VCC = 0 V. Latch-up immunity exceeds 250 mA per JESD17, and ESD robustness meets 2000-V HBM, 200-V MM, and 1000-V CDM per JESD22 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports single-supply operation across 3.3 V and 5 V logic domains |
| tpd (max) | 6.5 ns at VCC = 5 V, CL = 15 pF - ensures timing-critical bus handshaking in high-speed interfaces |
| Ioff Current | ≤5 µA at VCC = 0 V - enables safe hot-insertion and partial power-down without bus contention |
| Output Drive | ±35 mA per pin - sufficient for driving LED segment lines or moderate-capacitance PCB traces |
| Operating Temp | –40°C to +125°C - qualified for industrial and automotive under-hood applications |
| Input Voltage Tolerance | Up to 5.5 V on all I/O pins - allows direct interfacing with legacy 5 V peripherals without external level shifters |
| ESD Rating (HBM) | 2000 V - meets IEC 61000-4-2 Level 2 for system-level ESD immunity in end equipment |
Pinout & Package
TSSOP-20 (PW) package: 6.50 mm × 4.40 mm body, 0.65 mm pitch, exposed pad optional, RoHS-compliant with SN lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DIR (Pin 1) | Direction control input | Low = B→A data flow; High = A→B data flow - determines real-time bus directionality |
| OE (Pin 19) | Output enable input | Low = outputs active; High = all A/B ports enter high-impedance state - enables bus isolation |
| A1–A8 (Pins 2–9) | Port A I/O terminals | Bidirectional data path for first bus - compatible with 2–5.5 V logic levels |
| B1–B8 (Pins 11–18) | Port B I/O terminals | Bidirectional data path for second bus - electrically isolated from Port A when OE = high |
| VCC (Pin 20) | Power supply | Single supply rail powering both input and output stages - no separate IOVDD required |
| GND (Pin 10) | Ground reference | Common return path for all signals and internal logic - must be low-impedance for noise control |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-voltage I/O support | Enables interoperability between 2.5 V, 3.3 V, and 5 V subsystems without external translators |
| Slow edge-rate outputs | Reduces overshoot/undershoot on PCB traces, minimizing EMI and signal integrity issues in LED driver layouts |
| Ioff partial-power-down | Prevents damaging current backflow when VCC is off, critical for hot-swap and modular backplane designs |
| Overvoltage-tolerant inputs | Accepts up to 5.5 V regardless of VCC setting - simplifies interface to higher-voltage sensors or legacy controllers |
| Industrial temperature range | Guaranteed functionality from –40°C to +125°C - suitable for telecom infrastructure and motor control enclosures |
Applications
| LED Display Driver | Network Switch Backplane |
|---|---|
Use Scenario: Driving 8-bit column data lines in multiplexed 7-segment or dot-matrix LED displays with variable supply rails. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver isolating microcontroller GPIO (3.3 V) from LED sink drivers (5 V). Use Value: Eliminates need for discrete level shifters; slow edges prevent ghosting and reduce conducted EMI on display cables. | Use Scenario: Isolating management bus (I²C/SMBus) from switching fabric control lines in modular Ethernet switches. IC Role / Device Role / Timing Role: Direction-controlled bus buffer enabling firmware updates and diagnostics without disrupting packet forwarding paths. Use Value: OE pin allows runtime bus segmentation; Ioff prevents power leakage during module hot-swap events. |
| Industrial I/O Expander | Motor Driver Interface |
Use Scenario: Extending GPIO count of PLC CPU modules to drive relays, indicators, and sensor inputs across mixed-voltage field wiring. IC Role / Device Role / Timing Role: Octal transceiver providing galvanically isolated data path between 3.3 V controller and 24 V industrial I/O cards. Use Value: 125°C rating ensures reliability in enclosed control cabinets; overvoltage tolerance handles transient surges on field lines. | Use Scenario: Interfacing microcontroller PWM outputs to gate-driver ICs in BLDC motor inverters with split 3.3 V logic / 12 V gate-drive supplies. IC Role / Device Role / Timing Role: Unidirectional signal conditioner translating logic-level PWM to isolated gate-driver enable inputs. Use Value: Low propagation delay (<6.5 ns) preserves PWM duty-cycle fidelity; 35 mA drive supports optocoupler LED biasing. |
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 min (1.65 V), faster tpd (5.3 ns @ 3.3 V), but no Ioff support | Not suitable for partial-power-down systems; requires strict VCC sequencing | Choose for cost-sensitive 3.3 V-only systems needing higher speed and lower static current |
| 74AVC245 | Wider VCC range (1.2 V to 3.6 V), higher drive (±24 mA), no overvoltage tolerance | Cannot interface directly with 5 V peripherals; limited to low-voltage mobile/embedded use | Prefer for battery-powered devices with sub-2 V logic rails and minimal ESD exposure |
Compared with SN74LVC245A and 74AVC245, the SN74LV245APWRG3 uniquely combines 5.5 V input tolerance, Ioff-enabled power-down safety, and industrial temperature range - making it the only option among the three qualified for mixed-voltage industrial backplanes and hot-pluggable modules.
Availability
SN74LV245APWRG3 is available at Aetrix Electronics and suitable for LED display drivers, network switch backplanes, and industrial I/O expanders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74LV245APWRG3 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 logic solutions for industrial, automotive, and communications markets.
The SN74LV245A product line delivers robust, wide-supply-voltage octal transceivers optimized for mixed-signal system interfacing, bus isolation, and level translation in harsh operating environments.
FAQ
What is the maximum operating voltage for SN74LV245APWRG3?
The SN74LV245APWRG3 supports a VCC supply range of 2 V to 5.5 V. Its inputs tolerate up to 5.5 V regardless of VCC level, enabling reliable interfacing with 5 V peripherals even when powered from 3.3 V. This overvoltage capability is confirmed in Section 6.1 Absolute Maximum Ratings and Section 8.3 Feature Description of the official TI datasheet SCLS382R.
Does SN74LV245APWRG3 support partial power-down mode?
Yes, SN74LV245APWRG3 supports partial power-down via its Ioff feature. When VCC = 0 V, Ioff limits current flow to ≤5 µA, preventing back-current through powered I/O lines. This behavior is specified in Section 6.5 Electrical Characteristics and enabled by internal circuitry described in Section 8.1 Overview - making SN74LV245APWRG3 suitable for hot-swap and modular backplane applications.
What is the propagation delay of SN74LV245APWRG3 at 3.3 V supply?
At VCC = 3.3 V and CL = 15 pF, the SN74LV245APWRG3 exhibits a typical propagation delay (tpd) of 5.9 ns and a maximum of 11 ns across –40°C to +125°C. These values are measured from input transition to valid output transition and are documented in Section 6.7 Switching Characteristics of the TI datasheet SCLS382R.
Which package type does SN74LV245APWRG3 use?
SN74LV245APWRG3 uses the TSSOP-20 (PW) package: 6.50 mm × 4.40 mm body size, 0.65 mm lead pitch, with SN (matte tin) lead finish and moisture sensitivity level (MSL) 1. This is confirmed in the Package Option Addendum and Tape and Reel Information sections of the official TI documentation.
Can SN74LV245APWRG3 translate between 5 V and 3.3 V logic levels?
Yes, SN74LV245APWRG3 supports bidirectional level translation: its inputs accept up to 5.5 V independent of VCC, and outputs swing rail-to-rail within the VCC domain. For example, with VCC = 3.3 V, it accepts 5 V inputs and drives 3.3 V outputs - a capability explicitly stated in Section 8.3 Feature Description and validated in Section 6.3 Recommended Operating Conditions.
SN74LV245APWRG3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-TSSOP (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-TSSOP
SN74LV245APWRG3 FAQ
1.How can I place an order for SN74LV245APWRG3 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV245APWRG3 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 SN74LV245APWRG3 reliable?
The price and inventory of SN74LV245APWRG3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV245APWRG3 is usually 5 days.
3.What payment methods are accepted for SN74LV245APWRG3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV245APWRG3 transactions.
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4.How is shipping managed for SN74LV245APWRG3?
SN74LV245APWRG3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV245APWRG3 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 SN74LV245APWRG3?
For technical support, including SN74LV245APWRG3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV245APWRG3 requirements.
6.How does Aetrix verify that SN74LV245APWRG3 is sourced from the original manufacturer or authorized distributors?
All SN74LV245APWRG3 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 SN74LV245APWRG3 meets industry standards.
7.What is the process for return or replacement of SN74LV245APWRG3?
All SN74LV245APWRG3 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV245APWRG3, 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 SN74LV245APWRG3 part is unused and in its original packaging.
Return procedure for SN74LV245APWRG3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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