My Inquiry
My Account
Nexperia USA Inc. 74VHCT245PW,118
- Part No.:
- 74VHCT245PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74VHCT245PW,118.pdf
- Description:
- IC TXRX NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,495
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74VHCT245PW,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 voltage, supporting bidirectional data flow between A- and B-buses under DIR control and high-impedance isolation via active-low OE, used in industrial backplane interface and legacy parallel bus bridging applications.
For engineers reviewing the 74VHCT245PW,118 datasheet, 74VHCT245PW,118 pinout, 74VHCT245PW,118 application, or 74VHCT245PW,118 equivalent, key selection considerations include TTL-level input compatibility, 3-state output drive capability (±8 mA), propagation delay ≤7.7 ns (CL = 15 pF), -40 °C to +125 °C operation, and TSSOP20 package thermal performance.
Technical Context
The device implements dual-directional bus buffering using a single DIR input to select A→B or B→A data path, with OE enabling synchronous 3-state control across all eight channels. Its Schmitt-trigger inputs ensure noise immunity on slow-rising control signals.
It operates exclusively in CMOS logic family with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V), and delivers rail-to-rail CMOS output swing with guaranteed VOH ≥3.70 V and VOL ≤0.55 V under 8 mA load at 125 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with 5 V TTL systems and stable operation across industrial temperature range. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - Guarantees reliable recognition of standard TTL logic levels. |
| Output Drive | ±8 mA - Supports direct connection to standard 50 Ω transmission lines or multiple CMOS loads without external buffers. |
| Propagation Delay | ≤7.7 ns (CL = 15 pF) - Enables reliable operation in 100 MHz bus clock domains with margin. |
| Operating Temperature | -40 °C to +125 °C - Qualified for under-hood industrial control and power supply monitoring environments. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Reduces need for external ESD protection in board-level designs. |
| Power Dissipation | Ptot = 500 mW (derates 10.0 mW/K above 100 °C) - Matches thermal limits of TSSOP20 footprint on standard FR-4 PCBs. |
Pinout & Package
TSSOP20 plastic thin shrink small outline package (SOT360-1); 20 leads; body width 4.4 mm; 0.65 mm pitch; exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIR) | Direction control input | LOW enables A→B data transfer; HIGH enables B→A - determines real-time bus flow direction without latch or clock. |
| 2 (VCC) | Positive supply | 5 V nominal supply input; decoupling capacitor must be placed within 5 mm for stable high-speed switching. |
| 3–10 (A0–A7) | Port A I/O | Bidirectional data terminals for side A; internally connected to transceiver core with 3-state output drivers. |
| 11–18 (B0–B7) | Port B I/O | Bidirectional data terminals for side B; electrically isolated from Port A except when DIR/OE enable path. |
| 19 (OE) | Output enable (active LOW) | Drives all A/B outputs to high-impedance state when HIGH - enables bus sharing and hot-swap isolation. |
| 20 (GND) | Ground reference | 0 V return path for all internal logic and I/O; requires low-inductance connection to PCB ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Non-inverting bidirectional logic | Preserves signal polarity in both directions - eliminates need for external inversion logic in bus arbitration schemes. |
| TTL-compatible input thresholds | VIH = 2.0 V min ensures robust interfacing with legacy 5 V microcontrollers and FPGA I/O banks without level shifters. |
| 3-state bus isolation | Simultaneous high-Z on all 16 I/O pins reduces bus contention risk during multi-master arbitration or power sequencing. |
| Schmitt-trigger inputs | Provides >0.5 V hysteresis on DIR and OE - prevents chatter on noisy control lines in electrically harsh industrial enclosures. |
| Wide temperature range | Specified from -40 °C to +125 °C - supports deployment in uncooled motor drives and outdoor telecom equipment. |
Applications
| Industrial Backplane Interface | Legacy Parallel Bus Bridging |
|---|---|
|
Use Scenario: Interfacing a 5 V microcontroller to a multi-slot industrial backplane carrying address/data/control signals. IC Role / Device Role / Timing Role: Bidirectional bus transceiver isolating MCU I/O from backplane loading while preserving signal integrity across 20 cm traces. Use Value: Enables clean 5 V TTL-level handshaking with <7.7 ns propagation delay and simultaneous 3-state disable during slot insertion/removal. |
Use Scenario: Connecting an older ISA-style peripheral card to a modern embedded controller via parallel port expansion. IC Role / Device Role / Timing Role: Level-shifting and direction-controlled buffer between mismatched bus timing domains (e.g., 8 MHz ISA vs. 25 MHz ARM). Use Value: Eliminates need for discrete MOSFET switches by providing integrated DIR/OE control and ±8 mA drive into 50 Ω stubs. |
| Modular PLC I/O Expansion | Test Equipment Signal Routing |
|
Use Scenario: Adding isolated digital I/O modules to a programmable logic controller chassis with shared backplane power and ground. IC Role / Device Role / Timing Role: Isolating module-local bus from main CPU bus using OE-controlled high-Z state during firmware updates or diagnostics. Use Value: Prevents bus lockup during hot-plug events with guaranteed -40 °C to +125 °C functionality and HBM >2000 V ESD tolerance. |
Use Scenario: Reconfigurable signal routing matrix in automated test equipment switching between DUT pins and measurement instruments. IC Role / Device Role / Timing Role: Low-latency bidirectional path selector with sub-10 ns propagation and precise 3-state timing (ten/tdis ≤13.5 ns). Use Value: Supports 100 MHz pattern rates with deterministic enable/disable edges and minimal inter-channel skew (<1 ns typical). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC245APW,118 | Lower VCC range (1.65–3.6 V), CMOS-only inputs, 32 mA drive, 3.3 V system optimized | Requires level translation when interfacing with 5 V TTL sources; unsuitable for direct 5 V bus coupling | Select only for 3.3 V-only systems where higher drive strength justifies redesign of upstream logic levels. |
| SN74LVTH245PW | TI part with identical pinout, same 4.5–5.5 V range, but higher ICC (max 80 μA vs. 40 μA) and no CDM >1000 V rating | Valid drop-in replacement electrically, but lacks Nexperia's certified CDM ESD robustness for high-static environments | Acceptable for cost-sensitive 5 V applications where CDM >1000 V is not required per IEC 61000-4-2 system-level testing. |
Compared with 74LVC245APW,118 and SN74LVTH245PW, the 74VHCT245PW,118 uniquely balances TTL input compatibility, industrial temperature range, and certified CDM ESD resilience - making it optimal for legacy-system upgrades where signal integrity and field reliability are prioritized over ultra-low power.
Availability
74VHCT245PW,118 is available at Aetrix Electronics and suitable for industrial backplane interface, modular PLC I/O expansion, and legacy parallel bus bridging requiring stable component supply across extended temperature and long product lifecycles.
Supply support for 74VHCT245PW,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 with focus on efficiency, reliability, and miniaturization for industrial and automotive markets.
This device belongs to Nexperia's 74VHCT logic family, engineered specifically for seamless interoperability between legacy TTL systems and modern CMOS-based controllers in harsh-environment applications.
FAQ
Can 74VHCT245PW,118 operate at 3.3 V supply?
No. The 74VHCT245PW,118 is specified only for 4.5 V to 5.5 V operation per its recommended conditions table. At 3.3 V, VIH and VOL parameters fall outside guaranteed limits, risking unreliable TTL-level recognition and excessive output voltage drop. Use 74LVC245APW,118 instead for 3.3 V systems.
What is the maximum capacitive load this device can drive reliably?
The device is characterized up to 50 pF load capacitance with guaranteed timing (tpd ≤9.5 ns at VCC = 4.5–5.5 V). Driving >50 pF increases propagation delay nonlinearly and may cause overshoot; for >100 pF loads, add series termination or reduce edge rate using input RC filtering per Figure 5 test circuit guidelines.
Is the exposed pad on the TSSOP20 package electrically connected?
No. Per Nexperia SOT360-1 mechanical drawing, the exposed pad is thermally enhanced but has no electrical function. It may remain floating or be soldered to PCB ground for improved thermal dissipation, but must not be connected to any voltage net other than GND to avoid short circuits.
How does DIR and OE interact during state transitions?
OE is asynchronous and overrides DIR: when OE is HIGH, all outputs go high-impedance regardless of DIR state. When OE goes LOW, outputs become active after ten (enable time ≤13.5 ns), and data flow direction follows the sampled DIR level at that moment - no metastability risk due to internal synchronization design.
74VHCT245PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74VHCT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74VHCT245PW,118 FAQ
1.How can I place an order for 74VHCT245PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT245PW,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 74VHCT245PW,118 reliable?
The price and inventory of 74VHCT245PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT245PW,118 is usually 5 days.
3.What payment methods are accepted for 74VHCT245PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT245PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT245PW,118?
74VHCT245PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT245PW,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 74VHCT245PW,118?
For technical support, including 74VHCT245PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT245PW,118 requirements.
6.How does Aetrix verify that 74VHCT245PW,118 is sourced from the original manufacturer or authorized distributors?
All 74VHCT245PW,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 74VHCT245PW,118 meets industry standards.
7.What is the process for return or replacement of 74VHCT245PW,118?
All 74VHCT245PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT245PW,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 74VHCT245PW,118 part is unused and in its original packaging.
Return procedure for 74VHCT245PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74VHCT245PW,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
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…
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…
