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Renesas 74HC244FPDVEL-E
- Part No.:
- 74HC244FPDVEL-E
- Manufacturer:
- Renesas
- Package:
- -
- Datasheet:
-
74HC244FPDVEL-E.pdf
- Description:
- IC BUFFER NON-INVERT 6V
- Quantity:
- Payment:
- Shipping:
Inventory:4,000
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Product details
Overview
74HC244FPDVEL-E from Renesas Electronics is an octal non-inverting 3-state buffer/line driver with dual active-low enables (1G, 2G), operating from 2 V to 6 V supply, delivering 11 ns typical propagation delay (CL = 50 pF), ±35 mA output drive, and high fanout of 15 LSTTL loads. It serves as a bidirectional bus interface or address/data line driver in industrial control backplanes and microcontroller I/O expansion circuits.
For engineers reviewing the 74HC244FPDVEL-E datasheet, 74HC244FPDVEL-E pinout, 74HC244FPDVEL-E application, or 74HC244FPDVEL-E equivalent, this page provides verified functional specifications, SOP-20 pin mapping, real-world timing behavior under load, thermal and voltage derating guidance, and validated drop-in alternatives for legacy HC logic redesigns.
Technical Context
The 74HC244FPDVEL-E implements two independent 4-bit buffer groups, each controlled by its own active-low enable (1G for Y1–Y4, 2G for Y5–Y8), enabling selective bus isolation without signal inversion. Its CMOS input structure draws ≤1 µA max input current and supports TTL-compatible thresholds across the full 2–6 V VCC range.
Output switching is characterized at CL = 50 pF with 6 ns input rise/fall times; tPHL/tPLH are 12 ns typ (VCC = 4.5 V), while enable/disable times (tZL/tZH/tLZ/tHZ) are 11–19 ns typ depending on VCC and load condition. No Schmitt-trigger inputs are included.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.0 V to 6.0 V - Enables direct interfacing with 3.3 V and 5 V logic domains without level shifters. |
| Propagation Delay (tpd) | 11 ns typ @ VCC = 4.5 V, CL = 50 pF - Supports >20 MHz bus toggle rates in buffered data paths. |
| Output Drive Current | ±35 mA per output - Sustains robust signal integrity driving multiple LSTTL loads or PCB traces up to 10 cm. |
| Input Thresholds (VIH/VIL) | VIH = 3.15 V min, VIL = 1.35 V max @ VCC = 4.5 V - Ensures reliable noise margin against 3.3 V CMOS/TTL logic families. |
| Quiescent Supply Current | 4 µA max @ Ta = 25°C - Enables low-static-power operation in battery-backed or always-on monitoring subsystems. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade deployment in programmable logic controllers and factory automation hardware. |
Pinout & Package
SOP-20 package (JEITA PRSP0020DD-B, Renesas code FP-20DAV), 12.6 mm × 7.5 mm body, 1.27 mm pitch, gull-wing leads, Ni/Pd/Au plating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1G | Group 1 Output Enable (active low) | Asserting low enables Y1–Y4; high places outputs in high-impedance state - used for channel-select bus arbitration. |
| 2G | Group 2 Output Enable (active low) | Asserting low enables Y5–Y8; independent of 1G - allows simultaneous or staggered group activation. |
| 1A1–1A4 | Group 1 Input Terminals | Non-inverting inputs for Y1–Y4; no internal hysteresis - requires clean digital edges to avoid metastability. |
| 2A1–2A4 | Group 2 Input Terminals | Non-inverting inputs for Y5–Y8; electrically isolated from Group 1 - supports dual-bus buffering. |
| 1Y1–1Y4 | Group 1 Output Terminals | 3-state buffered outputs mirroring 1A1–1A4 when 1G = L - drives external loads with ±35 mA capability. |
| 2Y1–2Y4 | Group 2 Output Terminals | 3-state buffered outputs mirroring 2A1–2A4 when 2G = L - shares same electrical specs as Group 1 outputs. |
| VCC | Positive Supply | Must be decoupled locally with 0.1 µF ceramic capacitor - ripple >50 mV may cause output instability. |
| GND | Ground Reference | Common return for all inputs/outputs; must be low-impedance path to minimize ground bounce during switching. |
Key Features
| Feature | Design Value |
|---|---|
| High-speed CMOS architecture | 11 ns typical propagation delay enables use in 20+ MHz synchronous data buses without added timing margin. |
| Dual independent 4-bit enable control | 1G and 2G allow selective activation of two separate 4-bit channels - eliminates need for external gating logic. |
| TTL-compatible input thresholds | VIH ≥ 3.15 V @ VCC = 4.5 V ensures interoperability with legacy 5 V microcontrollers and FPGAs without pull-up resistors. |
| Low quiescent power consumption | 4 µA max ICC at 25°C reduces system standby power - critical for energy-sensitive industrial sensor nodes. |
| Robust 3-state output isolation | IOZ ≤ ±0.5 µA @ VCC = 6 V guarantees <1 µA leakage when disabled - prevents bus contention in multi-driver systems. |
Applications
| Industrial PLC Backplane Interface | Microcontroller I/O Expansion |
|---|---|
Use Scenario: Buffering parallel address/data lines between CPU module and modular I/O racks in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional bus driver isolating CPU bus from rack-level peripherals; 3-state outputs prevent contention during slot hot-swap. Use Value: Dual enable pins (1G/2G) allow independent control of address vs. data lanes, reducing FPGA GPIO usage by 50% versus single-enable buffers. |
Use Scenario: Extending GPIO count of ARM Cortex-M0+ MCU in smart meter design where native pins are insufficient for LCD, keypad, and sensor interfaces. IC Role / Device Role / Timing Role: Non-inverting level translator and drive booster; converts 3.3 V MCU outputs to 5 V tolerant signals for legacy peripherals. Use Value: 15 LSTTL fanout supports direct connection to 4-digit 7-segment displays without external transistors, cutting BOM cost by $0.18/unit. |
| Test Equipment Signal Routing | Legacy System Bus Isolation |
Use Scenario: Multiplexing stimulus signals from arbitrary waveform generator to multiple DUT channels in automated test equipment. IC Role / Device Role / Timing Role: Precision timing-critical buffer with matched tPHL/tPLH (12 ns typ) ensuring sub-ns skew across 8-channel routing paths. Use Value: 11 ns tpd and 19 ns max tHZ guarantee <25 ns total enable-to-valid-output latency - meets 40 MHz pattern rate requirement. |
Use Scenario: Replacing obsolete 74LS244 in aging CNC machine controller where board space and pinout compatibility are mandatory. IC Role / Device Role / Timing Role: Pin-compatible HC upgrade with identical SOP-20 footprint and function table - zero PCB rework required. Use Value: 2 V–6 V supply range allows direct replacement without modifying existing 5 V rail; 4 µA ICC extends mean time between failures by 3× vs. LS family. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal non-inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC244N | DIP-20 package; 100% pinout compatible but through-hole mounting; slightly higher tpd (13 ns typ @ 4.5 V). | Preferred for prototyping or legacy through-hole boards; unsuitable for surface-mount production. | Select SN74HC244N only when manual soldering or socket-based testing is required. |
| 74VHC244M | Higher speed (tpd = 7.5 ns typ @ 4.5 V); lower ICC (2 µA max); identical SOP-20 pinout and function. | Better suited for high-frequency data acquisition systems requiring <10 ns timing margins. | Choose 74VHC244M when upgrading for speed without changing layout; verify VCC stability as VHC has tighter noise immunity. |
Compared with 74HC244FPDVEL-E, SN74HC244N offers mechanical compatibility for hand-assembled systems but sacrifices 2 ns speed and increases board area, while 74VHC244M delivers measurable timing improvement and lower static power at the cost of stricter supply filtering requirements.
Availability
74HC244FPDVEL-E is available at Aetrix Electronics and suitable for industrial automation backplanes, microcontroller I/O expansion modules, automated test equipment signal routing, and legacy 5 V logic system upgrades requiring stable component supply and long-term lifecycle support.
Supply support for 74HC244FPDVEL-E 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
Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HD74HC244 product line was designed specifically for robust, low-power bus interfacing in industrial control and instrumentation systems requiring wide VCC tolerance and guaranteed 3-state isolation.
FAQ
What is the maximum clock frequency supported by the 74HC244FPDVEL-E in a data bus application?
The 74HC244FPDVEL-E does not operate on a clock signal-it is a combinatorial buffer. Its usable data rate depends on propagation delay and load. With 11 ns typical tpd and 50 pF load, it reliably supports bus toggle rates up to 20 MHz in well-designed layouts. For sustained 40 MHz operation, verify actual timing using worst-case tPHL/tPLH (23 ns max at –40°C to +85°C) and include setup/hold margins. The 74HC244FPDVEL-E datasheet specifies no maximum frequency rating because it is not a clocked device.
Does the 74HC244FPDVEL-E support mixed-voltage operation between 3.3 V and 5 V domains?
Yes-the 74HC244FPDVEL-E operates from 2 V to 6 V and features TTL-compatible input thresholds (VIH ≥ 3.15 V @ VCC = 4.5 V). When powered at 5 V, it accepts 3.3 V logic-high inputs safely; when powered at 3.3 V, its outputs swing rail-to-rail and remain compatible with 3.3 V receivers. However, driving 5 V-tolerant inputs from a 3.3 V-powered 74HC244FPDVEL-E requires verification of the receiver's VIL spec. Always reference the 74HC244FPDVEL-E Electrical Characteristics table for VIH/VIL values at your actual VCC.
Can the 74HC244FPDVEL-E replace a 74LS244 in an existing design without modifications?
Yes-74HC244FPDVEL-E is a direct pinout- and function-compatible upgrade for 74LS244 in SOP-20 format. It matches the same pin arrangement, truth table, and enable logic (active-low 1G/2G). Key improvements include wider VCC range (2–6 V vs. 4.75–5.25 V), lower ICC (4 µA vs. 19 mA), and higher noise immunity. No PCB changes are needed, but confirm that existing 5 V supply rails meet 74HC244FPDVEL-E's absolute max VCC (7.0 V) and that output loading remains within ±35 mA limits. The 74HC244FPDVEL-E eliminates LS-family DC power concerns while preserving timing behavior.
What is the recommended decoupling strategy for the 74HC244FPDVEL-E in high-speed applications?
Place a 0.1 µF X7R ceramic capacitor between VCC and GND as close as possible to pins 10 and 20 (VCC/GND), with trace lengths under 2 mm. For systems with >4 devices per 5 V rail, add a bulk 4.7 µF tantalum or aluminum polymer capacitor near the power entry point. Avoid shared vias between decoupling caps and IC pins. The 74HC244FPDVEL-E exhibits low ground bounce due to symmetrical output drive, but improper decoupling causes VCC droop during simultaneous switching, leading to VOL degradation or false enable triggering. Always validate with oscilloscope probing on VCC near the 74HC244FPDVEL-E package.
Is the 74HC244FPDVEL-E rated for automotive or safety-critical applications?
No-the 74HC244FPDVEL-E is classified as a Standard quality grade device per Renesas documentation, intended for industrial, office, and consumer equipment-not automotive, medical life-support, or aerospace systems. Its specified operating temperature is –40°C to +85°C, which meets industrial but not AEC-Q100 Grade 2 (–40°C to +105°C) requirements. Renesas explicitly prohibits use in "Specific" applications (e.g., aircraft, nuclear controls, surgical implants) without written consent. For automotive designs, select Renesas' dedicated automotive-grade HC variants or consult their sales office for qualified alternatives to the 74HC244FPDVEL-E.
74HC244FPDVEL-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- 74HC
- Package/Case:
- -
- Packaging:
- Bulk
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74HC244FPDVEL-E FAQ
1.How can I place an order for 74HC244FPDVEL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HC244FPDVEL-E 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 74HC244FPDVEL-E reliable?
The price and inventory of 74HC244FPDVEL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HC244FPDVEL-E is usually 5 days.
3.What payment methods are accepted for 74HC244FPDVEL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HC244FPDVEL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HC244FPDVEL-E?
74HC244FPDVEL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HC244FPDVEL-E 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 74HC244FPDVEL-E?
For technical support, including 74HC244FPDVEL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HC244FPDVEL-E requirements.
6.How does Aetrix verify that 74HC244FPDVEL-E is sourced from the original manufacturer or authorized distributors?
All 74HC244FPDVEL-E 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 74HC244FPDVEL-E meets industry standards.
7.What is the process for return or replacement of 74HC244FPDVEL-E?
All 74HC244FPDVEL-E units undergo pre-shipment inspection (PSI). If there is an issue with 74HC244FPDVEL-E, 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 74HC244FPDVEL-E part is unused and in its original packaging.
Return procedure for 74HC244FPDVEL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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