My Inquiry
My Account
Nexperia USA Inc. 74LVC4245AD,112
- Part No.:
- 74LVC4245AD,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
74LVC4245AD,112.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,907
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVC4245AD,112 from Nexperia is an octal dual-supply translating transceiver with 3-state bus-compatible outputs in both directions, designed for bidirectional level translation between 3 V (VCC(B)) and 5 V (VCC(A)) buses. It features independent DIR and active-low OE controls, Schmitt-trigger inputs for noise immunity, and operates across -40 °C to +125 °C. Used in mixed-voltage microcontroller I/O expansion, FPGA-to-ASIC interface, and legacy 5 V peripheral bridging into 3.3 V systems.
For engineers reviewing the 74LVC4245AD,112 datasheet, 74LVC4245AD,112 pinout, 74LVC4245AD,112 application, or 74LVC4245AD,112 equivalent, key selection criteria include dual-rail voltage support (1.5–5.5 V on VCC(A), 1.5–3.6 V on VCC(B)), propagation delay ≤8.5 ns (Bn→An at 3.6 V), 3-state isolation during suspend mode, and JEDEC JESD8B/JESD36 compliance for system-level interoperability.
Technical Context
This transceiver implements true bidirectional voltage translation using separate supply domains: VCC(A) powers the A-side (5 V bus) I/Os and control inputs, while VCC(B) powers the B-side (3 V bus) data terminals. Direction control is synchronous-DIR determines signal flow (A→B or B→A) only when OE is low; OE overrides DIR to force high-impedance on all outputs regardless of direction state.
Schmitt-trigger inputs on DIR, OE, and all data pins provide hysteresis (typ. 0.5 V) to tolerate slow edges and reduce noise-induced switching. The device guarantees no current path between VCC(A) and VCC(B) when either supply is at 0 V, enabling safe hot-insertion and partial-power-down operation in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC(A) Range | 1.5 V to 5.5 V - supports direct connection to 5 V TTL/CMOS logic and backward compatibility with 3.3 V systems. |
| VCC(B) Range | 1.5 V to 3.6 V - enables interfacing with modern low-voltage microcontrollers, FPGAs, and memory interfaces. |
| tPHL / tPLH (Bn→An) | 1.0–8.0 ns - ensures sub-10 ns latency for real-time bus arbitration and synchronous data handshaking. |
| VIH/VIL (Control Inputs) | 0–5.5 V input tolerance - allows 5 V logic signals to drive DIR/OE even when VCC(B) = 3.3 V or lower. |
| IOZ (Off-State Current) | ±5 μA max - guarantees minimal leakage during 3-state isolation, critical for low-power standby modes. |
| Operating Temp | -40 °C to +125 °C - qualified for industrial and extended-temperature embedded applications without derating. |
| ESD Rating | HBM >2000 V, CDM >1000 V - meets robustness requirements for board-level handling and in-system reliability. |
Pinout & Package
74LVC4245AD,112 is supplied in SO24 (SOT137-1) package: plastic small outline, 24-pin, 7.5 mm body width, standard gull-wing lead form. Pin 1 index located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VCC(A) | Supply for A-side (5 V bus) I/Os and control inputs; must be ≥ VCC(B) except in suspend mode. |
| 2 | DIR | Direction control: LOW = A→B, HIGH = B→A; Schmitt-triggered for noise immunity on slow edges. |
| 3–10 | A0–A7 | Bidirectional data terminals for 5 V bus; function as inputs or outputs depending on DIR and OE state. |
| 11–13 | GND | Common ground reference for both supply domains; three pins minimize ground bounce in high-speed switching. |
| 14–21 | B7–B0 | Bidirectional data terminals for 3 V bus; mirrored pin order (B7=pin14, B0=pin21) per logic diagram. |
| 22 | OE | Active-low output enable: HIGH forces all A/B outputs into high-impedance, overriding DIR state. |
| 23–24 | VCC(B) | Supply for B-side (3 V bus) data I/Os; dual VCC(B) pins reduce IR drop and improve power integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-supply translation | Independent VCC(A) and VCC(B) rails allow simultaneous 5 V ↔ 3.3 V bidirectional data transfer without external level shifters. |
| 3-state bus isolation | OE-controlled high-impedance on all A/B ports enables multi-drop bus sharing and prevents contention during reset or sleep. |
| Schmitt-trigger inputs | ≥0.5 V hysteresis on DIR, OE, and all data pins rejects noise and accommodates slow-rise clock or control signals. |
| Suspend-mode safety | No current path between VCC(A) and VCC(B) when either supply is 0 V - eliminates backfeed risk during hot-swap or partial power loss. |
| JEDEC-compliant I/O | Meets JESD8B/JESD36 for 5 V tolerant inputs and TTL-compatible thresholds at 3.3 V, ensuring interoperability with legacy logic families. |
Applications
| Microcontroller I/O Expansion | FPGA-to-ASIC Interface |
|---|---|
|
Use Scenario: Expanding GPIO count of a 3.3 V ARM Cortex-M MCU to drive legacy 5 V peripherals (e.g., displays, sensors, EEPROMs). IC Role / Device Role / Timing Role: Translates MCU's 3.3 V outputs to 5 V levels for peripheral writes and buffers 5 V status reads back to MCU inputs. Use Value: Eliminates need for eight discrete level shifters; maintains <8.5 ns round-trip latency for time-critical status polling. |
Use Scenario: Interfacing a 3.3 V FPGA I/O bank with a 5 V ASIC co-processor in a high-speed data acquisition module. IC Role / Device Role / Timing Role: Serves as bidirectional data channel for parallel command/status exchange, synchronized by shared clock and DIR control. Use Value: Enables deterministic timing with guaranteed tPHL/tPLH ≤8.5 ns and skew <1.5 ns across all 8 lanes. |
| Legacy Peripheral Bridging | Industrial Bus Isolation |
|
Use Scenario: Connecting modern 3.3 V SoC-based controllers to aging 5 V RS-232 transceivers or parallel printer ports. IC Role / Device Role / Timing Role: Acts as voltage translator and bus driver, with OE used to tri-state during UART idle periods or printer handshake asserts. Use Value: Supports full 8-bit parallel transfers at up to 100 Mbps effective throughput with no external pull-ups or biasing. |
Use Scenario: Isolating CAN or Modbus RTU communication lines from a main controller in harsh industrial environments. IC Role / Device Role / Timing Role: Provides galvanically isolated signal conditioning via optocoupler-driven DIR/OE, with VCC(B) tied to isolated 3.3 V domain. Use Value: Prevents ground loop currents between domains while maintaining fast edge rates (<2.5 ns rise/fall) for reliable protocol timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-supply translating transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APW | TSSOP24 package (4.4 mm width); identical electrical specs and pinout mapping but thinner profile and finer pitch. | Better suited for space-constrained PCBs where SO24 footprint is prohibitive; thermal resistance higher than SO24. | Select when board area is limited and reflow profile supports 0.65 mm pitch; verify solder mask clearance for exposed pad variants. |
| 74AVC4245BQ | DHVQFN24 package; supports wider VCC(A) range (1.2–3.6 V) but lacks 5 V tolerance on control inputs. | Optimized for ultra-low-voltage systems (1.2 V core logic); not suitable for direct 5 V bus interfacing without external clamping. | Choose only for sub-1.8 V designs requiring minimal height; avoid if interfacing with 5 V peripherals or legacy TTL. |
Compared with SN74LVC4245APW and 74AVC4245BQ, the 74LVC4245AD,112 offers the broadest voltage interoperability (5 V-tolerant controls + 1.5–5.5 V VCC(A)), mechanical robustness of SO24, and lowest thermal resistance among the three-making it optimal for industrial temperature cycling and long-term reliability-critical deployments.
Availability
74LVC4245AD,112 is available at Aetrix Electronics and suitable for industrial automation interfaces, automotive ECU diagnostics adapters, and medical device data acquisition systems requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 74LVC4245AD,112 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions with emphasis on reliability, efficiency, and manufacturability for high-volume applications.
The 74LVC4245A belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, engineered specifically for seamless voltage translation in mixed-supply digital systems-targeting industrial control, communications infrastructure, and consumer electronics where interoperability across legacy and modern logic families is essential.
FAQ
Can 74LVC4245AD,112 operate with VCC(A) = 3.3 V and VCC(B) = 1.8 V?
Yes. Per Table 5, VCC(A) supports 1.5–5.5 V and VCC(B) supports 1.5–3.6 V, with VCC(A) ≥ VCC(B) required for normal operation. At VCC(A) = 3.3 V and VCC(B) = 1.8 V, the device functions as a 3.3 V ↔ 1.8 V translator with VIH/VIL thresholds scaled accordingly (e.g., VIH ≈ 2.0 V min on control inputs). Propagation delay increases slightly versus 5 V/3.3 V operation but remains within spec.
What happens if DIR is floating while OE is low?
DIR has Schmitt-trigger inputs with defined hysteresis but no internal pull-up/down. A floating DIR causes undefined direction state, potentially resulting in bus contention if A and B sides drive opposing logic levels simultaneously. Nexperia recommends tying DIR to a controlled logic source or using external 10 kΩ pull-up/down resistor to ensure deterministic A→B or B→A flow.
Is the SO24 package (SOT137-1) RoHS compliant and lead-free?
Yes. The 74LVC4245AD,112 in SO24 packaging conforms to RoHS Directive 2011/65/EU and is lead-free, with matte tin (Sn) termination finish. The device meets JEDEC J-STD-020 moisture sensitivity level MSL3 (floor life 168 hours at ≤30 °C/60% RH) and is compatible with standard Pb-free reflow profiles (peak 260 °C).
How does suspend mode behave when VCC(A) = 0 V and VCC(B) = 3.3 V?
In suspend mode (VCC(A) = 0 V), all A-side I/Os and control inputs enter high-impedance, and no current flows between VCC(B) and the A-side pins-even if B-side signals are driven. The B-side remains fully functional: B0–B7 retain their 3.3 V logic levels, DIR and OE inputs remain active (with VCC(B)-referenced thresholds), and data can flow B→A if OE is low and DIR is asserted-but A-side outputs remain inactive until VCC(A) is restored.
74LVC4245AD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- Packaging:
- Tube
- Product Status:
- Obsolete
- Translator Type:
- -
- Channel Type:
- -
- Number of Circuits:
- -
- Channels per Circuit:
- -
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- -
- Output Signal:
- -
- Output Type:
- -
- Data Rate:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SOIC (0.295", 7.50mm Width)
74LVC4245AD,112 FAQ
1.How can I place an order for 74LVC4245AD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC4245AD,112 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 74LVC4245AD,112 reliable?
The price and inventory of 74LVC4245AD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC4245AD,112 is usually 5 days.
3.What payment methods are accepted for 74LVC4245AD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC4245AD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC4245AD,112?
74LVC4245AD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC4245AD,112 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 74LVC4245AD,112?
For technical support, including 74LVC4245AD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC4245AD,112 requirements.
6.How does Aetrix verify that 74LVC4245AD,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC4245AD,112 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 74LVC4245AD,112 meets industry standards.
7.What is the process for return or replacement of 74LVC4245AD,112?
All 74LVC4245AD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC4245AD,112, 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 74LVC4245AD,112 part is unused and in its original packaging.
Return procedure for 74LVC4245AD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC4245AD,112 Tags
-
74LVC1T45GW,125
Nexperia USA Inc.
-
74LVCH2T45DC,125
Nexperia USA Inc.
-
SN74LVC1T45DBVR
Texas Instruments
-
SN74LVC1T45DRLR
Texas Instruments
-
SN74LVC1T45DPKR
Texas Instruments
-
SN74LVC2T45DCTR
Texas Instruments
-
74LVC2T45GT,115
Nexperia USA Inc.
-
SN74LVC1T45YZPR
Texas Instruments
-
LSF0102DCUR
Texas Instruments
-
SN74LVC1T45DCKR
Texas Instruments
-
TXS0102DCTR
Texas Instruments
-
FXLP34P5X
onsemi
Tech Hub
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…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
