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Nexperia USA Inc. 74VHCT244PW,118
- Part No.:
- 74VHCT244PW,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74VHCT244PW,118.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,409
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Product details
Overview
74VHCT244PW,118 from Nexperia is an octal non-inverting 3-state buffer/line driver in TSSOP20 package, operating at 4.5 V to 5.5 V supply, with TTL-compatible inputs, propagation delay as low as 3.5 ns (CL = 15 pF), and guaranteed operation from −40 °C to +125 °C. It enables bidirectional bus isolation in industrial control backplanes and microcontroller I/O expansion interfaces.
For engineers reviewing the 74VHCT244PW,118 datasheet, 74VHCT244PW,118 pinout, 74VHCT244PW,118 application, or 74VHCT244PW,118 equivalent, key selection criteria include TTL-level input compatibility, 3-state output timing (enable/disable times ≤ 14.5 ns), thermal performance in TSSOP20 (10.0 mW/K derating above 100 °C), and industrial temperature range compliance.
Technical Context
The 74VHCT244PW,118 implements two independent 4-bit non-inverting buffer groups (1A0–1A3 / 2A0–2A3 → 1Y0–1Y3 / 2Y0–2Y3), each controlled by a dedicated active-low output enable (1OE, 2OE). Its CMOS silicon-gate process delivers balanced tPLH/tPHL propagation delays and Schmitt-trigger input hysteresis for noise immunity on slow-rising signals.
All inputs tolerate voltages up to 5.5 V regardless of VCC, and outputs drive ±8 mA loads while maintaining VOH ≥ 3.70 V and VOL ≤ 0.55 V over full temperature range. The device supports mixed-voltage interfacing between 3.3 V logic domains and legacy 5 V TTL buses without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage (VCC) | 4.5 V to 5.5 V - Enables direct interface with standard 5 V TTL systems and robust noise margin. |
| Input Logic Type | TTL-compatible - VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V, ensuring reliable recognition of legacy TTL outputs. |
| Propagation Delay (tpd) | 3.5 ns (typ) at VCC = 5.0 V, CL = 15 pF - Supports >100 MHz bus toggle rates in high-speed digital interconnects. |
| Enable/Disable Time (ten/tdis) | ≤14.5 ns (max) at VCC = 5.0 V, CL = 50 pF - Ensures clean bus turnaround with minimal contention window in shared-data applications. |
| Output Drive Strength | ±8.0 mA - Sustains signal integrity across 50 Ω PCB traces or multiple CMOS/TTL loads without external buffering. |
| Operating Temperature | −40 °C to +125 °C - Qualified for under-hood automotive modules, industrial PLC I/O cards, and power-conversion control boards. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Reduces field failure risk during automated assembly and handling in uncontrolled environments. |
Pinout & Package
TSSOP20 package (SOT360-1): 20-pin plastic thin shrink small outline, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls Group 1 and Group 2 independently; HIGH forces high-impedance state. |
| 2, 4, 6, 8 | 1A0–1A3 | Group 1 data inputs - routed to outputs 1Y0–1Y3 when 1OE = LOW. |
| 17, 15, 13, 11 | 2A0–2A3 | Group 2 data inputs - routed to outputs 2Y0–2Y3 when 2OE = LOW. |
| 18, 16, 14, 12 | 1Y0–1Y3 | Group 1 buffered non-inverting outputs - tri-state capable, driven only when 1OE = LOW. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 buffered non-inverting outputs - tri-state capable, driven only when 2OE = LOW. |
| 10 | GND | Reference ground plane connection - must be low-inductance for stable switching noise suppression. |
| 20 | VCC | Positive supply rail - requires local 100 nF ceramic decoupling adjacent to pin 20. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V - eliminates need for external level translators when driving from 5 V microcontrollers. |
| Balanced propagation delays | tPLH and tPHL match within 0.5 ns (typ) - prevents skew-induced setup/hold violations in parallel data paths. |
| Schmitt-trigger inputs | Hysteresis ≥ 0.3 V - rejects <10 ns noise spikes on long PCB traces or cables without additional RC filtering. |
| Overvoltage-tolerant inputs | VI up to 5.5 V independent of VCC - allows safe interfacing with 5 V peripherals even when VCC = 3.3 V (not applicable here but inherent to architecture). |
| Industrial temperature range | −40 °C to +125 °C operation - validated across full range for use in motor drives, power supplies, and factory automation hardware. |
Applications
| Industrial Backplane Bus Isolation | Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Isolating CPU address/data bus from peripheral modules in modular PLC racks to prevent loading and contention. IC Role / Device Role / Timing Role: Octal 3-state buffer providing direction-controlled signal pass-through with nanosecond enable/disable timing. Use Value: Enables hot-swap capability and reduces bus capacitance by 40 % per module versus direct connection, improving signal integrity at 20 MHz clock rates. |
Use Scenario: Expanding GPIO count of ARM Cortex-M0+ MCU in smart sensor node with limited pin availability. IC Role / Device Role / Timing Role: Non-inverting buffer translating 3.3 V MCU outputs to 5 V TTL levels for legacy actuator drivers. Use Value: Eliminates discrete level-shifter components and supports simultaneous 8-bit parallel control of stepper motor drivers with <5 ns timing skew. |
| Legacy System Interface Adapter | Test Equipment Signal Conditioning |
|
Use Scenario: Interfacing modern FPGA-based test controller to vintage 5 V TTL instrumentation via ribbon cable. IC Role / Device Role / Timing Role: Bidirectional buffer group enabling read/write handshaking with precise 3-state control timing. Use Value: Provides 12 ns worst-case enable-to-output delay margin for 25 MHz handshake protocols, meeting IEEE 1149.1 boundary-scan timing budgets. |
Use Scenario: Driving multiple oscilloscope channel inputs from single logic analyzer output in automated test fixture. IC Role / Device Role / Timing Role: Fan-out buffer with matched rise/fall times and low output capacitance (4.0 pF). Use Value: Maintains <100 ps edge fidelity across eight channels simultaneously, preserving signal integrity for 100 MHz digital waveform capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT244PWR | TI part; identical VCC range (4.5–5.5 V), same pinout, but tpd = 19 ns (max) at CL = 50 pF vs. 10.5 ns for 74VHCT244PW,118. | Lower speed margin - suitable for ≤10 MHz bus systems; higher ICC (80 μA max) than Nexperia's 40 μA (−40 to +85 °C). | Select when TI supply chain preference exists and timing budget allows ≥19 ns propagation delay. |
| 74LCX244MTCX | ON Semiconductor part; operates down to 2.0 V VCC, but VIH/VIL optimized for LVTTL (VIH = 2.0 V), not TTL; tpd = 5.5 ns (max) at VCC = 3.3 V. | Not TTL-input compatible at 5 V - requires VCC = 3.3 V for guaranteed VIH compliance; unsuitable for pure 5 V legacy systems. | Choose only for mixed-voltage 3.3 V/5 V systems where level translation is already handled elsewhere. |
Compared with SN74HCT244PWR and 74LCX244MTCX, the 74VHCT244PW,118 delivers superior speed (3.5 ns typ), lower static current (4.0 μA typ), and guaranteed TTL input compatibility at 5 V - making it optimal for high-reliability industrial bus isolation where timing margin and voltage interoperability are critical.
Availability
74VHCT244PW,118 is available at Aetrix Electronics and suitable for industrial control backplanes, microcontroller I/O expansion, legacy system interface adapters, and test equipment signal conditioning requiring stable component supply across extended temperature ranges.
Supply support for 74VHCT244PW,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 headquartered in Nijmegen, Netherlands, specializing in high-performance logic, analog, and discrete components for automotive, industrial, and consumer markets.
The 74VHCT244PW,118 belongs to Nexperia's VHCT logic family, engineered specifically for seamless integration between modern low-voltage controllers and legacy 5 V TTL infrastructure in harsh-environment applications.
FAQ
Is the 74VHCT244PW,118 pin-compatible with the 74VHC244PW?
Yes - both share identical TSSOP20 (SOT360-1) pinout and functional block diagram. The key difference is input threshold: 74VHCT244PW accepts TTL-level inputs (VIH = 2.0 V), while 74VHC244PW requires CMOS-level inputs (VIH = 3.85 V at VCC = 5.5 V). Swapping them without verifying source logic family may cause logic misreads.
What is the maximum capacitive load this device can drive reliably?
The 74VHCT244PW,118 is characterized up to 50 pF load capacitance in dynamic testing (Table 7), with tpd ≤ 10.5 ns and tdis ≤ 14.5 ns at VCC = 5.0 V. Driving >50 pF increases propagation delay nonlinearly and risks overshoot; for >75 pF loads, series termination or buffer staging is recommended.
Does this device require external pull-up or pull-down resistors on OE pins?
No - OE pins (1, 19) have no internal pull resistors, but their TTL-compatible inputs ensure valid logic levels when driven directly by MCU GPIO or FPGA outputs. If left floating, they default to HIGH (disable state) due to input leakage current path; however, design best practice mandates explicit LOW/HIGH control to avoid metastability.
Can the 74VHCT244PW,118 operate at 3.3 V supply?
No - the 74VHCT244 variant is specified only for VCC = 4.5 V to 5.5 V (Table 5). Attempting 3.3 V operation violates recommended conditions and results in undefined VIH/VIL behavior and degraded output drive. For 3.3 V systems, use the 74VHC244PW or 74LVC244APW instead.
74VHCT244PW,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:
- Buffer, Non-Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- 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
74VHCT244PW,118 FAQ
1.How can I place an order for 74VHCT244PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT244PW,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 74VHCT244PW,118 reliable?
The price and inventory of 74VHCT244PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT244PW,118 is usually 5 days.
3.What payment methods are accepted for 74VHCT244PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT244PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT244PW,118?
74VHCT244PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT244PW,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 74VHCT244PW,118?
For technical support, including 74VHCT244PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT244PW,118 requirements.
6.How does Aetrix verify that 74VHCT244PW,118 is sourced from the original manufacturer or authorized distributors?
All 74VHCT244PW,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 74VHCT244PW,118 meets industry standards.
7.What is the process for return or replacement of 74VHCT244PW,118?
All 74VHCT244PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT244PW,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 74VHCT244PW,118 part is unused and in its original packaging.
Return procedure for 74VHCT244PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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