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Nexperia USA Inc. 74LVCH245AD,118
- Part No.:
- 74LVCH245AD,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVCH245AD,118.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,339
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Product details
Overview
74LVCH245AD,118 from Nexperia is an octal 3-state bus transceiver with bidirectional data flow control via DIR and output enable (OE) inputs, operating from 1.2 V to 3.6 V supply, supporting mixed-voltage translation between 3.3 V and 5 V systems, and featuring bus hold on all data inputs for floating-input stability.
For engineers reviewing the 74LVCH245AD,118 datasheet, 74LVCH245AD,118 pinout, 74LVCH245AD,118 application, or 74LVCH245AD,118 equivalent, this device is selected for level-shifting in industrial I/O expansion, FPGA-to-peripheral interconnects, and legacy bus bridging where IOFF-enabled partial power-down and Schmitt-trigger input tolerance are critical.
Technical Context
This transceiver implements dual-bus bidirectional data transfer using a single DIR signal to select direction (A→B or B→A), while OE (active LOW) independently controls 3-state output disable. Its IOFF circuitry ensures zero backflow current during power-down, meeting JEDEC JESD78 requirements for partial power-down operation.
All eight data I/Os feature bus hold (74LVCH245A variant only), eliminating external pull resistors on unused lines, and Schmitt-trigger inputs tolerate slow-rising/falling edges - enabling reliable interfacing with mechanical switches, long traces, or low-slew-rate drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 1.2 V to 3.6 V - supports direct interface with 1.8 V, 2.5 V, and 3.3 V logic domains without level shifters. |
| Input voltage tolerance | Up to 5.5 V - enables safe connection to 5 V peripherals while powered from 3.3 V or lower supplies. |
| Propagation delay (VCC = 3.3 V) | Max 6.3 ns - ensures timing compliance in high-speed parallel bus applications up to ~80 MHz clock-equivalent rates. |
| IOFF leakage (VCC = 0 V) | ±10 μA max - prevents damaging back-current when one side of the bus is powered down while the other remains active. |
| Bus hold current (VI = 0.8 V) | 75 μA typical - actively maintains valid logic state on un-driven A/B pins, removing need for external biasing. |
| Operating temperature | −40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLCs, and extended-temperature embedded controllers. |
| ESD rating (HBM) | >2000 V - provides robust handling margin during board assembly and field service without additional protection. |
Pinout & Package
74LVCH245AD,118 is supplied in SO20 (SOT163-1) package: plastic small outline, 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW = A→B data flow; HIGH = B→A; determines physical signal path through transceiver core. |
| 2–9 (A0–A7) | Port A data I/O | Bidirectional data terminals connected to source-side bus (e.g., microcontroller or FPGA); include bus hold. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and I/O circuits; must be low-impedance for noise immunity. |
| 11–18 (B0–B7) | Port B data I/O | Bidirectional data terminals connected to sink-side bus (e.g., peripheral or memory); include bus hold. |
| 19 (OE) | Output enable (active LOW) | Drives all A/B outputs into high-impedance state when HIGH; enables bus sharing across multiple devices. |
| 20 (VCC) | Power supply | Primary supply for internal logic and I/O buffers; decoupling capacitor required within 1 cm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (1.2 V to 3.6 V) | Enables drop-in use across 1.8 V, 2.5 V, and 3.3 V system domains without redesign or external regulators. |
| Overvoltage-tolerant inputs (to 5.5 V) | Permits direct connection to 5 V legacy peripherals while powered from 3.3 V, eliminating discrete level translators. |
| IOFF partial power-down protection | Blocks reverse current flow when VCC = 0 V, allowing hot-swap or asymmetric power sequencing in modular systems. |
| Schmitt-trigger inputs | Accepts slow-rising/falling signals (e.g., from sensors or mechanical switches) without oscillation or metastability. |
| Bus hold on all data I/Os | Maintains last-valid logic state on floating A/B pins, reducing BOM count and PCB space vs. external pull-up/down resistors. |
Applications
| Industrial I/O Expansion | FPGA-to-Peripheral Interface |
|---|---|
|
Use Scenario: Connecting a 3.3 V FPGA GPIO bank to legacy 5 V industrial sensors and actuators over shared parallel bus. IC Role / Device Role / Timing Role: Bidirectional voltage translator and bus isolator, enabling synchronous read/write cycles with sub-10 ns propagation delay. Use Value: Eliminates need for eight discrete level shifters; bus hold prevents glitches during FPGA configuration or reset sequences. |
Use Scenario: Interfacing a Xilinx Artix-7 FPGA's LVCMOS33 I/O bank to a 2.5 V ADC and 1.8 V DAC on same PCB trace. IC Role / Device Role / Timing Role: Dual-supply domain bridge with direction-controlled data flow and OE-gated bus arbitration. Use Value: Single-chip solution replaces two separate uni-directional translators; IOFF protects ADC/DAC during FPGA power sequencing. |
| Automotive Body Control Module | Embedded Controller Bus Bridging |
|
Use Scenario: Isolating MCU-controlled CAN/LIN subsystems from 5 V display backlight drivers and HVAC motor controllers. IC Role / Device Role / Timing Role: High-reliability bus buffer with −40 °C to +125 °C operation and ESD-hardened I/O for under-dash environments. Use Value: Withstands automotive load dump transients; bus hold prevents undefined states during ignition cycling or battery disconnect. |
Use Scenario: Extending an ARM Cortex-M7 microcontroller's internal APB bus to external SRAM and flash memory in a medical data logger. IC Role / Device Role / Timing Role: Timing-critical address/data multiplexer with DIR-synchronized latching and OE-controlled tristate isolation. Use Value: Meets 6.3 ns tpd requirement at 3.3 V for 80 MHz bus timing; Schmitt inputs reject noise from switching power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APWR (TI) | No bus hold; identical VCC range, IOFF, and pinout; slightly higher VOL at 24 mA (0.55 V vs. 0.4 V). | Lacks bus hold - requires external pull resistors if A/B lines float during idle states. | Select when cost sensitivity outweighs need for bus hold; verify external biasing in low-power sleep modes. |
| 74ALVC245PW,118 (Nexperia) | Wider VCC (1.65 V–3.6 V); no bus hold; faster tpd (5.2 ns @ 3.3 V); same SO20 package and pinout. | Optimized for speed-critical interfaces but lacks floating-input stabilization - unsuitable for mechanically switched inputs. | Choose for highest-speed parallel links where bus hold is unnecessary and 1.2 V operation is not required. |
Compared with SN74LVC245APWR and 74ALVC245PW,118, the 74LVCH245AD,118 uniquely combines bus hold, 1.2 V minimum supply, and −40 °C to +125 °C qualification - making it optimal for resource-constrained, mixed-voltage industrial edge nodes requiring zero-BOM floating-input resilience.
Availability
74LVCH245AD,118 is available at Aetrix Electronics and suitable for industrial I/O expansion, FPGA-to-peripheral interface, and automotive body control module applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVCH245AD,118 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, reliable logic, analog, and MOSFET solutions optimized for efficiency, miniaturization, and robustness in mass-market electronics.
The 74LVCH245A series belongs to Nexperia's advanced LVC logic family, engineered specifically for low-voltage, mixed-signal system interfacing where voltage translation, power sequencing resilience, and ESD-hardened I/O are mandatory.
FAQ
Can 74LVCH245AD,118 operate with VCC = 1.2 V while interfacing with 5 V inputs?
Yes. The device supports VCC as low as 1.2 V and tolerates input voltages up to 5.5 V independent of supply level. This allows direct connection to 5 V sources while powered from ultra-low-voltage rails - verified per Table 5 (VI = 0 to 5.5 V) and Table 4 (VI max = +6.5 V absolute).
What is the function of the DIR pin, and how does it interact with OE?
DIR selects data direction: LOW enables A→B transfer; HIGH enables B→A. OE (active LOW) overrides DIR - when OE is HIGH, all outputs go high-impedance regardless of DIR state. This allows independent control of data flow and bus release, essential for multi-master arbitration.
Does the bus hold feature apply to all pins, including DIR and OE?
No. Bus hold is implemented only on data I/O pins A0–A7 and B0–B7 (per Table 6 note [4]). Control pins DIR and OE have standard CMOS inputs without bus hold - they must be actively driven or externally biased to avoid undefined states.
How does IOFF behavior protect the device during partial power-down?
When VCC = 0 V, the IOFF circuit disables all output buffers and blocks current flow between A/B ports and VCC/GND. Measured IOFF leakage is ≤±10 μA (Table 6), preventing destructive back-current from live buses into a powered-down section - critical for hot-plug and modular power architectures.
74LVCH245AD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVCH
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74LVCH245AD,118 FAQ
1.How can I place an order for 74LVCH245AD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVCH245AD,118 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 74LVCH245AD,118 reliable?
The price and inventory of 74LVCH245AD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVCH245AD,118 is usually 5 days.
3.What payment methods are accepted for 74LVCH245AD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVCH245AD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVCH245AD,118?
74LVCH245AD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVCH245AD,118 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 74LVCH245AD,118?
For technical support, including 74LVCH245AD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVCH245AD,118 requirements.
6.How does Aetrix verify that 74LVCH245AD,118 is sourced from the original manufacturer or authorized distributors?
All 74LVCH245AD,118 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 74LVCH245AD,118 meets industry standards.
7.What is the process for return or replacement of 74LVCH245AD,118?
All 74LVCH245AD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVCH245AD,118, 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 74LVCH245AD,118 part is unused and in its original packaging.
Return procedure for 74LVCH245AD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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