My Inquiry
My Account
NXP Semiconductors 74VHCT245D,118
- Part No.:
- 74VHCT245D,118
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74VHCT245D,118.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74VHCT245D,118 from Nexperia is an octal non-inverting 3-state bus transceiver with TTL-compatible inputs and CMOS outputs, operating at 4.5 V to 5.5 V supply, supporting bidirectional data flow between A- and B-buses under DIR control and high-impedance isolation via active-low OE, used in industrial backplane interfacing and legacy microcontroller I/O expansion.
For engineers reviewing the 74VHCT245D,118 datasheet, 74VHCT245D,118 pinout, 74VHCT245D,118 application, or 74VHCT245D,118 equivalent, key selection criteria include TTL-level input compatibility, 8-bit bidirectional bus isolation timing (tpd ≤ 7.7 ns @ 5 V, CL = 15 pF), SO20 package thermal derating (12.3 mW/K above 109 °C), and −40 °C to +125 °C operation with Schmitt-trigger input hysteresis.
Technical Context
The device implements dual-directional 8-bit data transfer using a single DIR pin to select A→B or B→A path, with OE asserting high-impedance on all 16 I/O pins simultaneously. It uses Si-gate CMOS technology with TTL-input threshold logic (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), enabling direct interface with legacy 5 V TTL systems.
Propagation delay is symmetric for both directions (An↔Bn) and tightly controlled across temperature (−40 °C to +125 °C), with enable/disable times (ten/tdis) specified down to 5.0 ns/6.0 ns (typ) at 5 V and 15 pF load. Input clamping diodes and ESD protection (HBM > 2000 V, CDM > 1000 V) support robust board-level handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL logic rails and stable operation across industrial voltage tolerances. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees reliable recognition of TTL logic levels without level-shifting circuitry. |
| Propagation Delay | tpd ≤ 7.7 ns (typ) @ VCC = 5 V, CL = 15 pF - Enables high-speed bus handshaking in real-time control and data acquisition systems. |
| Output Drive | ±8 mA @ VOH/VOL - Sustains signal integrity driving 15 pF loads across full temperature range with defined VOL ≤ 0.55 V. |
| Operating Temperature | −40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLCs, and extended-temperature embedded controllers. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - Meets JEDEC JS-001/JS-002 Class 2/C3 requirements for automated assembly and field reliability. |
| Power Dissipation | Ptot = 500 mW (SO20), derates 12.3 mW/K above 109 °C - Supports continuous operation in thermally constrained enclosures with predictable thermal margin. |
Pinout & Package
74VHCT245D,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 beveled corner; pin numbering follows counter-clockwise sequence from top-left when viewed from component side.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW selects A→B data flow; HIGH selects B→A - enables single-wire bus arbitration in shared-memory or peripheral interconnects. |
| 2–9 (A0–A7) | Port A bidirectional I/O | Connects to microcontroller or ASIC local bus; driven high-Z when OE = HIGH or direction mismatched. |
| 10 (GND) | Ground reference | 0 V return path for all internal logic and output drivers; must be low-impedance for noise immunity. |
| 11–18 (B0–B7) | Port B bidirectional I/O | Interfaces to memory, peripheral, or backplane bus; electrically isolated from A-port when OE = HIGH. |
| 19 (OE) | Output enable (active LOW) | Drives all A/B pins to high-impedance when HIGH - essential for multi-drop bus contention avoidance and hot-swap capability. |
| 20 (VCC) | Positive supply | 5 V nominal power rail; decoupling capacitor (100 nF ceramic) required within 10 mm of this pin for switching noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible inputs | Operates directly with 5 V TTL logic families without external level shifters or pull-ups, reducing BOM count and layout complexity. |
| Schmitt-trigger action | Provides hysteresis on all inputs (typ. 0.4 V), rejecting noise on slow-rising signals such as mechanical switch debouncing or long trace routing. |
| Bidirectional 3-state control | Single DIR + OE pair manages full 16-pin bus isolation and direction - simplifies FPGA or MCU GPIO resource allocation versus discrete transceivers. |
| Extended temperature range | Specified from −40 °C to +125 °C ensures functional reliability in engine control units, motor drives, and outdoor telecom equipment. |
| Low dynamic power | CPD = 15 pF enables sub-mW dynamic dissipation at 1 MHz (PD ≈ 37.5 μW @ 5 V), critical for battery-backed or energy-constrained subsystems. |
Applications
| Industrial Backplane Interface | Legacy Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Interfacing multiple 8-bit microcontrollers to a shared parallel address/data bus in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus buffer isolating CPU-local buses from shared backplane, with DIR synchronized to address decode and OE gated by chip-select logic. Use Value: Eliminates bus contention during multi-master arbitration while maintaining <8 ns propagation delay for deterministic cycle timing. |
Use Scenario: Expanding GPIO count of an 8051-based sensor node using external SRAM and parallel LCD controller. IC Role / Device Role / Timing Role: Transceiver bridging MCU port P0 to external peripherals, configured as A→B for write cycles and B→A for read cycles via DIR toggle. Use Value: Enables full 8-bit parallel data transfer at 12 MHz system clock without wait states, leveraging TTL-level compatibility with legacy 8051 outputs. |
| Automotive Body Control Module | Test Equipment Digital I/O Subsystem |
|
Use Scenario: Isolating diagnostic CAN controller I/O from main MCU domain in a BCM housing ambient temperatures up to 125 °C. IC Role / Device Role / Timing Role: Level-shifting and bus-isolation transceiver between 3.3 V MCU and 5 V legacy diagnostics hardware, with OE tied to reset supervisor. Use Value: Maintains signal integrity across wide temperature swing and meets automotive ESD requirements (HBM > 2 kV) without added protection components. |
Use Scenario: Configurable digital stimulus/response channel in automated test equipment requiring precise timing and multi-voltage domain isolation. IC Role / Device Role / Timing Role: Programmable direction bus interface between FPGA pattern generator and DUT, with DIR and OE controlled via PCIe register writes. Use Value: Delivers sub-10 ns edge-to-edge timing repeatability and supports hot-plug detection via OE-driven high-Z state during module insertion. |
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), LVTTL-compatible inputs, higher speed (tpd ≤ 4.2 ns @ 3.3 V), but no 5 V tolerance. | Requires level-shifting for 5 V systems; suited for modern 3.3 V FPGA/microcontroller designs with tighter timing budgets. | Select when migrating to lower-voltage domains and 5 V interoperability is not required. |
| SN74LVTH245PW | TI part with identical 5 V TTL-compatible inputs, same SO20 package, but higher ICC (max 80 μA vs 40 μA) and wider tpd variation (3.5–10 ns). | Validated for TI-specific reference designs; pinout matches but requires revalidation of enable timing margins in high-noise environments. | Choose only if existing TI design ecosystem mandates vendor lock-in or legacy schematic reuse. |
Compared with 74LVC245AD,118 and SN74LVTH245PW, the 74VHCT245D,118 uniquely balances 5 V TTL compatibility, −40 °C to +125 °C qualification, and sub-8 ns propagation delay without sacrificing static current (ICC ≤ 40 μA), making it optimal for mixed-voltage industrial upgrades where legacy interface integrity is mandatory.
Availability
74VHCT245D,118 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74VHCT245D,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 logic, analog, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in industrial, automotive, and consumer applications.
The 74VHCT245 series belongs to Nexperia's high-speed CMOS logic portfolio, designed specifically for robust 5 V system interfacing with TTL compatibility, extended temperature resilience, and low-power operation in space- and thermal-constrained embedded systems.
FAQ
What is the maximum clock frequency supported by 74VHCT245D,118?
The 74VHCT245D,118 is not a clocked device and has no internal clock; its usable data rate depends on propagation delay and system setup/hold timing. With tpd ≤ 7.7 ns (typ) and tdis ≤ 19.5 ns (max) at 5 V, it supports reliable 8-bit parallel transfers up to ~50 MHz in well-terminated, low-capacitance PCB layouts.
Can 74VHCT245D,118 operate with a 3.3 V supply?
No - the 74VHCT245D,118 is specified only for VCC = 4.5 V to 5.5 V. Its TTL-compatible inputs require ≥2.0 V VIH and are not guaranteed to function correctly below 4.5 V; use 74LVC245AD,118 instead for 3.3 V operation.
Is the SO20 package RoHS compliant and lead-free?
Yes - the 74VHCT245D,118 in SOT163-1 (SO20) package is manufactured per RoHS Directive 2011/65/EU and is lead-free, with matte tin (Sn) termination finish and halogen-free molding compound, verified per Nexperia's material declarations.
How does the Schmitt-trigger input improve noise immunity?
The Schmitt-trigger action provides input hysteresis (~0.4 V typical), meaning the rising threshold (VIH) and falling threshold (VIL) differ significantly. This prevents multiple output transitions when input signals cross the logic threshold slowly or with noise, ensuring clean edge detection in noisy industrial environments.
74VHCT245D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74VHCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74VHCT245D,118 FAQ
1.How can I place an order for 74VHCT245D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT245D,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 74VHCT245D,118 reliable?
The price and inventory of 74VHCT245D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT245D,118 is usually 5 days.
3.What payment methods are accepted for 74VHCT245D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT245D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT245D,118?
74VHCT245D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT245D,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 74VHCT245D,118?
For technical support, including 74VHCT245D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT245D,118 requirements.
6.How does Aetrix verify that 74VHCT245D,118 is sourced from the original manufacturer or authorized distributors?
All 74VHCT245D,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 74VHCT245D,118 meets industry standards.
7.What is the process for return or replacement of 74VHCT245D,118?
All 74VHCT245D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT245D,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 74VHCT245D,118 part is unused and in its original packaging.
Return procedure for 74VHCT245D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74VHCT245D,118 Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
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…
