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Nexperia USA Inc. 74VHCT244D,118
- Part No.:
- 74VHCT244D,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74VHCT244D,118.pdf
- Description:
- IC BUFFER NON-INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,955
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Product details
Overview
74VHCT244D,118 from Nexperia is an octal non-inverting 3-state buffer/line driver in SO20 package, operating at 4.5 V to 5.5 V supply with TTL-compatible inputs, 3.5 ns typical propagation delay (CL = 15 pF), ±8 mA output drive, and -40 °C to +125 °C temperature range - used for bidirectional bus interfacing in industrial control backplanes.
For engineers reviewing the 74VHCT244D,118 datasheet, 74VHCT244D,118 pinout, 74VHCT244D,118 application, or 74VHCT244D,118 equivalent, key selection criteria include TTL-level input compatibility, 20-pin SOIC thermal performance at extended temperature, 3-state enable timing (ten ≤ 9.5 ns), and static drive capability across full industrial ambient range.
Technical Context
The 74VHCT244D,118 implements dual 4-bit non-inverting buffers with independent active-low 3-state enables (1OE, 2OE), supporting high-impedance isolation of two 4-bit data paths. Each output drives up to ±8 mA while maintaining VOH ≥ 3.7 V and VOL ≤ 0.55 V under load.
Its Schmitt-trigger input action rejects noise on control lines, and input voltage tolerance exceeds VCC (up to 7.0 V), enabling safe level translation from higher-voltage logic domains into 5 V systems without external clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures reliable operation with standard 5 V rails and tolerates 10% line variation. |
| Input Logic Type | TTL-compatible - accepts VIH ≥ 2.0 V and VIL ≤ 0.8 V, enabling direct interface with legacy 74LS/74F families. |
| Propagation Delay | 3.5 ns (typ) @ VCC = 5.0 V, CL = 15 pF - supports >100 MHz bus toggle rates in point-to-point configurations. |
| Output Drive | ±8 mA - sufficient to drive 50 Ω transmission lines or fan-out to 10 LSTTL loads without buffering. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drive control units. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets IEC 61000-4-2 Level 2 for board-level robustness in factory environments. |
| Power Dissipation | 500 mW (max) @ Tamb ≤ 109 °C - SO20 package supports continuous operation in sealed enclosures up to 85 °C ambient. |
Pinout & Package
74VHCT244D,118 uses the SOT163-1 plastic small outline package (SO20), 20-lead, 7.5 mm body width, with gull-wing leads and pin 1 index marker.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low 3-state enable inputs - assert LOW to activate respective 4-bit output group; HIGH places outputs in high-Z. |
| 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 - driven only when 1OE = LOW; otherwise high-impedance. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Group 2 buffered non-inverting outputs - driven only when 2OE = LOW; otherwise high-impedance. |
| 10 | GND | Ground reference - must be connected to system 0 V plane; decoupling capacitor required within 5 mm. |
| 20 | VCC | Positive supply - requires local 100 nF ceramic bypass capacitor between VCC and GND pins. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-compatible input thresholds | VIH ≥ 2.0 V, VIL ≤ 0.8 V - eliminates need for level-shifting circuitry when interfacing with 74LS, 74F, or microcontroller GPIOs. |
| Balanced propagation delays | tPLH and tPHL match within 0.5 ns - ensures minimal skew across all 8 channels for synchronous bus applications. |
| Input overvoltage tolerance | VI up to 7.0 V - allows safe connection to 5 V buses even during hot-swap or power-rail sequencing events. |
| High-impedance output leakage | IOZ ≤ ±10 μA @ VCC = 5.5 V - prevents unintended current flow into disabled downstream circuits during standby. |
| Thermal-enhanced SO20 package | RθJA = 81.3 K/W - enables 500 mW dissipation at 109 °C ambient before derating begins. |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module Bus Isolation |
|---|---|
|
Use Scenario: Bidirectional data routing between CPU and I/O expansion slots in modular programmable logic controllers. IC Role / Device Role / Timing Role: Octal buffer isolates address/data bus segments, with 1OE/2OE synchronized to slot-select signals for time-multiplexed access. Use Value: Enables deterministic 3-state switching (tdis ≤ 11.5 ns) to prevent bus contention during slot arbitration cycles. |
Use Scenario: Signal conditioning between 5 V CAN transceiver PHY and 3.3 V microcontroller in door module ECUs. IC Role / Device Role / Timing Role: Level-shifting buffer translates TTL logic levels while providing galvanic isolation via high-Z state during sleep mode. Use Value: Input overvoltage tolerance (7.0 V) withstands load-dump transients on vehicle 5 V rail without clamping diodes. |
| Test Equipment Digital Pattern Generator | Legacy Instrumentation Data Acquisition |
|
Use Scenario: Driving multiple parallel digital stimulus channels from a single FPGA I/O bank in automated test systems. IC Role / Device Role / Timing Role: Fan-out buffer expands 4-bit control bus to eight synchronized output lines with matched edge rates. Use Value: Balanced tPLH/tPHL ensures <100 ps inter-channel skew across all 8 outputs at 50 MHz toggle rate. |
Use Scenario: Interfacing vintage GPIB or IEEE-488 controllers with modern embedded processors in calibration labs. IC Role / Device Role / Timing Role: Logic-level translator and bus driver for 8-bit parallel handshake protocols with strict setup/hold timing. Use Value: Guaranteed VOL ≤ 0.55 V at 8 mA load ensures reliable recognition by legacy TTL receivers with degraded input thresholds. |
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 |
|---|---|---|---|
| SN74HCT244N | Same TTL-compatible inputs and SO20 package, but rated only to +85 °C; lower ESD rating (HBM 2000 V vs. 2000 V, CDM not specified). | Not suitable for under-hood automotive or high-ambient industrial deployments requiring +125 °C operation. | Select when cost sensitivity outweighs extended temperature or CDM robustness requirements. |
| 74VHC244D,118 | CMOS-input variant (VIH ≥ 3.85 V @ VCC = 5.5 V); identical SO20 package and timing, but incompatible with 74LS logic without pull-ups. | Requires external biasing for legacy TTL source interfaces; unsuitable where mixed 74LS/74HCT logic coexists. | Choose only for pure CMOS systems where input threshold matching simplifies design. |
Compared with SN74HCT244N, the 74VHCT244D,118 adds guaranteed +125 °C operation and documented CDM > 1000 V protection; versus 74VHC244D,118, it provides native TTL-level compatibility without external resistors - critical for drop-in replacement in legacy 5 V designs.
Availability
74VHCT244D,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, automotive body control modules, automated test equipment, and legacy instrumentation requiring stable component supply across extended temperature ranges.
Supply support for 74VHCT244D,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 discrete components with focus on efficiency, reliability, and sustainability.
The 74VHCT244 series belongs to Nexperia's advanced logic portfolio, designed specifically for robust 5 V system interfacing in harsh-environment applications including industrial automation and automotive subsystems.
FAQ
What is the maximum clock frequency supported by the 74VHCT244D,118?
The 74VHCT244D,118 does not operate as a clocked device but as a combinatorial buffer. Its 3.5 ns typical propagation delay (VCC = 5.0 V, CL = 15 pF) supports reliable data toggling up to approximately 140 MHz in point-to-point configurations, assuming proper PCB layout and termination.
Can the 74VHCT244D,118 drive a 50 Ω transmission line directly?
Yes - with ±8 mA output drive and VOL ≤ 0.55 V at 8 mA, the device can terminate a 50 Ω line to ground or VCC in open-drain-like configurations. For AC-coupled 50 Ω lines, series 33 Ω resistors are recommended to damp reflections while preserving signal integrity.
Is the 74VHCT244D,118 pin-compatible with the 74LS244?
Yes - the 74VHCT244D,118 matches the 74LS244 pinout exactly in SO20 (SOT163-1) package, including identical 1OE/2OE placement and Y/A mapping. It provides superior speed, lower power, and higher noise immunity while maintaining functional equivalence.
Does the 74VHCT244D,118 require external pull-up resistors on its outputs?
No - the outputs are push-pull and do not require pull-ups. However, if used in wired-OR configurations (e.g., shared bus with other drivers), external pull-ups may be needed to establish a defined HIGH state when all drivers are in high-Z. This is application-dependent, not device-mandated.
74VHCT244D,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74VHCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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-SO
74VHCT244D,118 FAQ
1.How can I place an order for 74VHCT244D,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74VHCT244D,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 74VHCT244D,118 reliable?
The price and inventory of 74VHCT244D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHCT244D,118 is usually 5 days.
3.What payment methods are accepted for 74VHCT244D,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHCT244D,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74VHCT244D,118?
74VHCT244D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74VHCT244D,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 74VHCT244D,118?
For technical support, including 74VHCT244D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHCT244D,118 requirements.
6.How does Aetrix verify that 74VHCT244D,118 is sourced from the original manufacturer or authorized distributors?
All 74VHCT244D,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 74VHCT244D,118 meets industry standards.
7.What is the process for return or replacement of 74VHCT244D,118?
All 74VHCT244D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHCT244D,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 74VHCT244D,118 part is unused and in its original packaging.
Return procedure for 74VHCT244D,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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