My Inquiry
My Account
Renesas IDT74LVC4245ASOG8
- Part No.:
- IDT74LVC4245ASOG8
- Manufacturer:
- Renesas
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
IDT74LVC4245ASOG8.pdf
- Description:
- IC TRANSLTR BIDIRECTIONAL 24SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,554
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
IDT74LVC4245ASOG8 from Integrated Device Technology is an octal noninverting bus transceiver with dual-supply voltage translation (3.3V ↔ 5V), ±24mA drive strength, industrial temperature range (–40°C to +85°C), 5V-tolerant I/O, and 3-state outputs. It enables asynchronous bidirectional data transfer between mixed-voltage buses in embedded control and interface subsystems.
For engineers reviewing the IDT74LVC4245ASOG8 datasheet, IDT74LVC4245ASOG8 pinout, IDT74LVC4245ASOG8 application, or IDT74LVC4245ASOG8 equivalent, key selection criteria include VCCA/VCCB supply separation, DIR/OE control logic, propagation delay (≤6.7 ns), rail-to-rail output swing, and SOIC-24 green package compatibility with legacy 5V/3.3V system interconnects.
Technical Context
The IDT74LVC4245ASOG8 implements a dual-rail CMOS transceiver architecture with independent A-port (5V) and B-port (3.3V) supplies, enabling true bidirectional level shifting without external biasing. Direction is controlled by DIR, while OE overrides direction and places both ports in high-impedance state.
All inputs feature hysteresis (100 mV typical) for noise immunity; outputs deliver ±24mA drive on A-port and ±24mA on B-port under respective VCC conditions. The device supports hot insertion and maintains rail-to-rail swing across its full industrial operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCCA Supply | 5V ±0.5V - powers A-port (5V logic domain) and defines VOH/VOL thresholds for A-side outputs |
| VCCB Supply | 2.7V to 3.6V - powers B-port (3.3V logic domain); 3.3V nominal enables compatibility with LVTTL/LVCMOS systems |
| Propagation Delay | ≤6.7 ns (A→B), ≤6.3 ns (B→A) - ensures sub-7 ns latency for real-time bus arbitration and synchronous handshaking |
| Output Drive | ±24mA per pin - drives moderate capacitive loads (e.g., 50pF traces + multiple inputs) without signal degradation |
| Input Hysteresis | 100 mV typical - rejects noise spikes up to 100 mV on DIR, OE, and data lines in electrically noisy environments |
| Operating Temp | –40°C to +85°C - validated for industrial control, motor drives, and telecom infrastructure where ambient extremes occur |
| I/O Voltage Tolerance | 5V tolerant on all pins - allows safe connection to 5V buses even when VCCB = 3.3V, eliminating external clamping diodes |
Pinout & Package
Package: SOIC-24 (SOG), gull-wing lead form, RoHS-compliant green finish (per ordering code "SOG8"). Dimensions: 15.4 mm × 7.5 mm × 2.36 mm (JEDEC MS-013).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 20 | GND | Separate ground reference for A-port and B-port logic domains; requires low-inductance PCB tie to common system ground plane |
| 10, 11 | VCCA | 5V supply input for A-port drivers and inputs; bypass with 0.1 µF ceramic capacitor near pin |
| 12, 13 | VCCB | 3.3V supply input for B-port drivers and inputs; decoupling required independently from VCCA |
| 19 | DIR | Direction control input (active-HIGH): HIGH enables A→B flow; LOW enables B→A flow |
| 18 | OE | Output enable input (active-LOW): LOW enables transceiver; HIGH forces both ports into 3-state high-Z |
| A1–A8 (pins 2–9) | A-port I/O | Bidirectional 5V-tolerant data lines; function as inputs or 3-state outputs depending on DIR/OE state |
| B1–B8 (pins 14–17, 21–24) | B-port I/O | Bidirectional 3.3V I/O lines; tolerate 5V inputs; driven by VCCB-regulated output stage |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output swing | VOH ≥ 4.3V (A-port, IOH = –24mA), VOL ≤ 0.55V - maximizes noise margin in 5V systems with marginal VCC regulation |
| Hot-insertion support | IOZH/IOZL ≤ ±5 µA in 3-state - prevents bus contention and backdrive damage during live board insertion |
| Dual-supply isolation | VCCA and VCCB powered independently - eliminates ground loop currents between 5V and 3.3V subsystems |
| Low static power | ICCL ≤ 80 µA (A-port), ICCL ≤ 50 µA (B-port) - reduces quiescent current in always-on industrial monitoring nodes |
| Capacitance-optimized I/O | CIN = 5 pF, CI/O = 11 pF - minimizes switching-induced crosstalk and EMI in dense PCB layouts |
Applications
| Industrial PLC Backplane Interface | Legacy 5V MCU to Modern 3.3V Peripheral Bridge |
|---|---|
Use Scenario: Connecting a 5V-rated CPU module to 3.3V I/O expansion cards in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional level-shifting transceiver managing address/data/control bus traffic between mismatched voltage domains. Use Value: Eliminates need for discrete level-shifters or voltage translators per signal line, reducing BOM count and layout area by >70% versus discrete solutions. |
Use Scenario: Interfacing an aging 5V microcontroller to new 3.3V sensors, ADCs, and communication ICs in retrofit industrial instrumentation. IC Role / Device Role / Timing Role: Voltage-domain translator enabling direct pin-to-pin connection of parallel bus signals without timing skew or level conversion delays. Use Value: Maintains <6.7 ns propagation delay across all eight channels, preserving setup/hold timing margins for 10+ MHz parallel interfaces. |
| Telecom Line Card Voltage Translation | Mixed-Voltage Test Equipment Bus Coupler |
Use Scenario: Isolating 5V control logic from 3.3V DSP/FPGA-based signal processing blocks on a telecom line card. IC Role / Device Role / Timing Role: Asynchronous bus transceiver with DIR-controlled directionality and OE-gated 3-state isolation for shared memory or register access. Use Value: 5V-tolerant I/O allows safe connection to legacy 5V control planes while driving modern 3.3V logic with ±24mA sink/source capability. |
Use Scenario: Coupling test fixtures with 5V DUT interfaces to 3.3V automated test equipment (ATE) controllers. IC Role / Device Role / Timing Role: Reconfigurable bidirectional buffer enabling flexible signal routing between voltage-mismatched test subsystems. Use Value: Industrial temperature rating (–40°C to +85°C) ensures stable operation during extended burn-in tests at elevated ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver and voltage translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC4245APWR | TI part uses same 24-pin TSSOP package but specifies VCCB = 1.65V–3.6V (wider low-voltage range); propagation delay slightly higher (max 7.5 ns) | Supports 1.8V I/O domains not covered by IDT74LVC4245ASOG8; less suitable for strict 3.3V-only designs requiring minimal delay | Select if interfacing to 1.8V peripherals; verify timing closure due to longer tPHL/tPLH |
| 74AVC4245PW,118 | NXP part offers lower ICCZ (300 µA vs 500 µA) and faster max tPLH (5.5 ns), but lacks 5V tolerance on B-port I/O pins | Requires external protection for B-port when connected to 5V sources; unsuitable for hot-plug scenarios involving 5V backplanes | Prefer for ultra-low-power 3.3V↔3.3V or 3.3V↔2.5V translation where 5V tolerance is unnecessary |
Compared with SN74LVC4245APWR and 74AVC4245PW,118, the IDT74LVC4245ASOG8 delivers guaranteed 5V tolerance on all pins and tighter propagation delay (≤6.7 ns), making it optimal for robust industrial 5V/3.3V bus bridging where signal integrity and fault resilience are critical.
Availability
IDT74LVC4245ASOG8 is available at Aetrix Electronics and suitable for industrial PLC backplanes, telecom line cards, and mixed-voltage test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant green packaging.
Supply support for IDT74LVC4245ASOG8 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
Integrated Device Technology (IDT), now part of Renesas Electronics, is a fabless semiconductor company specializing in timing, interface, and memory solutions for communications, computing, and industrial markets.
The IDT74LVC4245ASOG8 belongs to IDT's LVC logic family, designed specifically for reliable voltage translation and bus interfacing in harsh industrial environments where mixed-supply interoperability and thermal stability are essential.
FAQ
What is the maximum recommended operating voltage for VCCA and VCCB on the IDT74LVC4245ASOG8?
The IDT74LVC4245ASOG8 specifies VCCA = 5V ± 0.5V (i.e., 4.5V to 5.5V) and VCCB = 2.7V to 3.6V. Exceeding these ranges risks violating absolute maximum ratings and may cause permanent damage. The device is not rated for 3.3V ±10% operation on VCCB - 3.6V is the hard upper limit.
Does the IDT74LVC4245ASOG8 support hot swapping, and how is this implemented?
Yes, the IDT74LVC4245ASOG8 supports hot insertion via its 5V-tolerant I/O structure and low leakage in 3-state mode (IOZH/IOZL ≤ ±5 µA). When OE is HIGH, both ports enter high-impedance state before power rails stabilize, preventing backdrive current and bus contention during live board insertion into powered backplanes.
How does the DIR pin control data direction in the IDT74LVC4245ASOG8?
In the IDT74LVC4245ASOG8, DIR = LOW enables data flow from B-port to A-port (3.3V → 5V), while DIR = HIGH enables A-port to B-port (5V → 3.3V). This control is overridden by OE: when OE = HIGH, both ports go high-Z regardless of DIR state, providing unconditional bus isolation.
What is the significance of hysteresis on input pins of the IDT74LVC4245ASOG8?
The IDT74LVC4245ASOG8 incorporates 100 mV typical input hysteresis on all control and data pins. This increases noise immunity by creating separate VIH and VIL thresholds - for example, a rising signal must exceed VIH by ≥100 mV to register as HIGH, and falling signals must drop below VIL by ≥100 mV to register as LOW - suppressing false toggling in EMI-prone industrial settings.
Can the IDT74LVC4245ASOG8 be used for unidirectional translation only, and how is that configured?
Yes, the IDT74LVC4245ASOG8 can operate unidirectionally: fix DIR to a constant logic level (HIGH for A→B, LOW for B→A) and use OE to gate data flow. For example, with DIR = HIGH and OE toggled, only A-port drives B-port - B-port inputs remain valid but outputs are disabled, enabling clean 5V→3.3V translation without reverse path interference.
IDT74LVC4245ASOG8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74LVC
- Package/Case:
- Packaging:
- Tape & Reel (TR)
- 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)
IDT74LVC4245ASOG8 FAQ
1.How can I place an order for IDT74LVC4245ASOG8 through Aetrix?
Please submit a Request for Quotation (RFQ) for IDT74LVC4245ASOG8 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 IDT74LVC4245ASOG8 reliable?
The price and inventory of IDT74LVC4245ASOG8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for IDT74LVC4245ASOG8 is usually 5 days.
3.What payment methods are accepted for IDT74LVC4245ASOG8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for IDT74LVC4245ASOG8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for IDT74LVC4245ASOG8?
IDT74LVC4245ASOG8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your IDT74LVC4245ASOG8 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 IDT74LVC4245ASOG8?
For technical support, including IDT74LVC4245ASOG8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your IDT74LVC4245ASOG8 requirements.
6.How does Aetrix verify that IDT74LVC4245ASOG8 is sourced from the original manufacturer or authorized distributors?
All IDT74LVC4245ASOG8 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 IDT74LVC4245ASOG8 meets industry standards.
7.What is the process for return or replacement of IDT74LVC4245ASOG8?
All IDT74LVC4245ASOG8 units undergo pre-shipment inspection (PSI). If there is an issue with IDT74LVC4245ASOG8, 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 IDT74LVC4245ASOG8 part is unused and in its original packaging.
Return procedure for IDT74LVC4245ASOG8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
IDT74LVC4245ASOG8 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
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
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…
