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Nexperia USA Inc. 74VHC245D,118
- Part No.:
- 74VHC245D,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74VHC245D,118.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:344
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Product details
Overview
74VHC245D,118 from Nexperia is a high-speed CMOS octal bus transceiver with non-inverting 3-state outputs in both directions, featuring DIR (direction control) and active-low OE (output enable) for bidirectional bus isolation in digital systems. It operates from 2.0 V to 5.5 V, supports -40 °C to +125 °C ambient range, and delivers propagation delay as low as 3.5 ns (VCC = 4.5–5.5 V, CL = 15 pF). It is used in microcontroller peripheral expansion, memory address/data bus interfacing, and level-shifting between logic domains.
For engineers reviewing the 74VHC245D,118 datasheet, 74VHC245D,118 pinout, 74VHC245D,118 application, or 74VHC245D,118 equivalent, this page provides verified functional role, SO20 package mapping, real-world timing behavior, thermal derating profile, and validated alternatives for industrial bus interface design.
Technical Context
The 74VHC245D,118 implements dual-directional data flow via a single DIR input that selects A→B (send) or B→A (receive), while OE independently places all 16 I/Os into high-impedance state. Its Schmitt-trigger inputs accept overvoltage signals up to 7.0 V and tolerate slow-rising edges - critical for noisy industrial bus environments.
It uses Si-gate CMOS technology with balanced tPLH/tPHL propagation delays (≤5.5 ns typical at 5 V), TTL-compatible input thresholds only in the VHCT variant (not applicable here), and guaranteed static drive strength: VOH ≥ 3.94 V at IO = −8 mA (VCC = 4.5 V), VOL ≤ 0.36 V at IO = 8 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 2.0 V to 5.5 V - enables direct interface with 3.3 V and 5 V logic families without level shifters. |
| Propagation Delay (tpd) | 3.5 ns (typ) at VCC = 5 V, CL = 15 pF - supports >100 MHz bus toggle rates in short-trace applications. |
| Output Drive (IO) | ±25 mA - sufficient to drive 50 Ω transmission lines or multiple CMOS loads without external buffers. |
| Input Thresholds (VIH/VIL) | VIH = 3.85 V, VIL = 1.65 V at VCC = 5.5 V - ensures noise margin >0.7 V under worst-case supply and temperature. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood automotive ECUs, industrial PLC backplanes, and outdoor telecom gear. |
| ESD Protection | HBM >2000 V, CDM >1000 V - reduces field failure risk during manual handling and board assembly. |
| Power Dissipation (Ptot) | 500 mW (SO20, Tamb ≤ 109 °C); derates 12.3 mW/K above - defines maximum sustained switching frequency before thermal throttling. |
Pinout & Package
74VHC245D,118 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads, 7.5 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a notch or bevel on the package top edge.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW = A→B data flow; HIGH = B→A - enables full-duplex bus arbitration with single control line. |
| 2–9 (A0–A7) | Port A bidirectional I/O | Connects to microcontroller or CPU data/address bus; driven or sensed depending on DIR state. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-inductance connection. |
| 11–18 (B0–B7) | Port B bidirectional I/O | Interfaces to peripheral devices (e.g., SRAM, FPGA, display controller); electrically isolated when OE = HIGH. |
| 19 (OE) | Active-low output enable | When HIGH, forces all A/B pins to high-Z - essential for multi-master bus sharing and hot-swap isolation. |
| 20 (VCC) | Positive supply | Must be decoupled with 100 nF ceramic capacitor within 5 mm of pin to suppress switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Balanced propagation delays | tPLH and tPHL match within ±0.5 ns - eliminates duty-cycle distortion in clock-forwarding or strobe-based protocols. |
| Schmitt-trigger inputs | Hysteresis ≥ 0.5 V - rejects EMI-induced glitches on long PCB traces or unshielded cables. |
| Voltage-tolerant inputs | Accept VI up to 7.0 V independent of VCC - allows safe interfacing with 5 V peripherals even when VCC = 3.3 V. |
| 3-state bus compatibility | Output leakage < ±0.25 μA in OFF-state - prevents signal contention and power waste when multiple transceivers share one bus. |
| Wide temperature operation | Specified from −40 °C to +125 °C - eliminates need for derating or thermal monitoring in sealed enclosures. |
Applications
| Microcontroller Bus Expansion | Memory Interface Buffering |
|---|---|
|
Use Scenario: Expanding GPIO count of an ARM Cortex-M4 MCU to drive 16-bit parallel LCD or ADC interface. IC Role / Device Role / Timing Role: Bidirectional data shuttle between MCU's limited port and external peripheral; DIR toggled per transaction phase, OE synchronized to chip select. Use Value: Eliminates need for two separate unidirectional buffers; 3.5 ns tpd ensures setup/hold timing closure at 25 MHz bus clock. |
Use Scenario: Isolating a 32-bit microprocessor data bus from legacy 16-bit SRAM modules during read/write cycles. IC Role / Device Role / Timing Role: Direction-controlled data path between CPU D[15:0] and SRAM DQ[15:0]; OE asserted during address latching to prevent bus contention. Use Value: Enables mixed-width memory subsystems without custom ASIC; ±25 mA drive sustains signal integrity across 10 cm PCB traces. |
| FPGA-to-ASIC Communication Bridge | Industrial I/O Module Data Multiplexing |
|
Use Scenario: Interfacing Xilinx Artix-7 FPGA I/O banks (3.3 V) with legacy ASIC (5 V) using shared address/data bus. IC Role / Device Role / Timing Role: Level-translating transceiver with direction control managed by FPGA state machine; OE used for bus arbitration with other peripherals. Use Value: Input voltage tolerance up to 7.0 V allows direct 5 V ASIC signal connection without external level shifters. |
Use Scenario: Consolidating sensor data streams (RS-485, analog mux outputs) onto a single CAN controller data bus in a DIN-rail PLC. IC Role / Device Role / Timing Role: Time-multiplexed bidirectional buffer between isolated sensor front-end and main controller; OE sequenced to avoid bus collisions. Use Value: −40 °C to +125 °C rating ensures reliable operation inside thermally unregulated industrial cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC245AD,118 | Lower VCC range (1.2–3.6 V); 3.3 V only; 3.2 ns tpd at 3.3 V | Not suitable for 5 V systems; better for ultra-low-power portable designs | Select if system runs exclusively at 3.3 V and requires lower ICC (< 10 μA) and smaller die size. |
| SN74LVCH245AQPWRQ1 | Automotive AEC-Q100 Grade 1 (−40 °C to +125 °C); same pinout; higher ESD (HBM 8 kV) | Qualified for automotive infotainment and ADAS domain controllers | Choose for automotive production where qualification and extended reliability testing are mandatory. |
Compared with 74VHC245D,118, the 74LVC245AD,118 trades 5 V compatibility for lower static current and faster speed at 3.3 V, while the SN74LVCH245AQPWRQ1 adds automotive qualification and robustness at higher cost and identical functional behavior.
Availability
74VHC245D,118 is available at Aetrix Electronics and suitable for industrial automation, embedded computing, and telecommunications infrastructure requiring stable component supply across extended temperature ranges and multi-year production cycles.
Supply support for 74VHC245D,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 focused on high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74VHC series targets general-purpose digital interfacing with emphasis on speed, noise immunity, and wide supply voltage operation - designed specifically for robust bus bridging in harsh electrical environments.
FAQ
Can 74VHC245D,118 operate with VCC = 3.3 V and interface to 5 V peripherals?
Yes. Its inputs tolerate up to 7.0 V regardless of VCC, enabling safe connection to 5 V peripherals when powered from 3.3 V. Outputs swing rail-to-rail (VOH ≈ VCC, VOL ≈ 0 V), so external pull-ups or level translators are required for 5 V logic-high recognition on the receiving side.
What is the maximum recommended clock rate for data transfer using 74VHC245D,118?
While not a clocked device, its 3.5 ns typical propagation delay (VCC = 5 V, CL = 15 pF) supports reliable data toggling up to ~100 MHz in point-to-point configurations. For bus applications with 50 pF load, max usable frequency drops to ~60 MHz due to 7.0 ns tpd and rise/fall time limitations.
Is thermal pad soldering required for the SO20 package of 74VHC245D,118?
No. The SO20 (SOT163-1) package has no exposed thermal pad. Thermal dissipation relies on leads and PCB copper; Ptot = 500 mW at Tamb ≤ 109 °C, derating linearly by 12.3 mW/K above that temperature.
How does OE assertion affect power consumption during bus idle periods?
When OE = HIGH, all outputs enter high-impedance state with OFF-state current ≤ ±0.25 μA per pin (VCC = 5.5 V), reducing total ICC to < 10 μA. This enables ultra-low-power sleep modes in battery-backed systems without disabling the entire bus.
74VHC245D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74VHC
- 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:
- 8mA, 8mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74VHC245D,118 FAQ
1.How can I place an order for 74VHC245D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHC245D,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 74VHC245D,118 reliable?
The price and inventory of 74VHC245D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHC245D,118 is usually 5 days.
3.What payment methods are accepted for 74VHC245D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHC245D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHC245D,118?
74VHC245D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHC245D,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 74VHC245D,118?
For technical support, including 74VHC245D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHC245D,118 requirements.
6.How does Aetrix verify that 74VHC245D,118 is sourced from the original manufacturer or authorized distributors?
All 74VHC245D,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 74VHC245D,118 meets industry standards.
7.What is the process for return or replacement of 74VHC245D,118?
All 74VHC245D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHC245D,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 74VHC245D,118 part is unused and in its original packaging.
Return procedure for 74VHC245D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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