My Inquiry
My Account
Texas Instruments SN74HC244MDWREP
- Part No.:
- SN74HC244MDWREP
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74HC244MDWREP.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,262
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74HC244MDWREP from Texas Instruments is an octal 3-state noninverting buffer/line driver IC designed for memory address buffering, bus driving, and clock distribution in extended-temperature industrial and defense systems. It features two independent 4-bit sections with separate output-enable (OE) controls, operates from 2 V to 6 V, supports −55°C to 125°C ambient range, and delivers ±7.8 mA output drive per channel.
For engineers reviewing the SN74HC244MDWREP datasheet, SN74HC244MDWREP pinout, SN74HC244MDWREP application, or SN74HC244MDWREP equivalent, key selection criteria include its enhanced temperature qualification, SOIC-20 package compatibility, 3-state bus interface capability, and high-current drive for LSTTL loads in ruggedized embedded control designs.
Technical Context
This device implements dual 4-bit noninverting buffer architecture with independent OE control per section, enabling selective bus isolation without data inversion. Each output supports true 3-state (high-impedance) operation with fast enable/disable timing (typ. 26 ns at 4.5 V).
It uses silicon-gate CMOS technology for low power consumption (ICC ≤ 160 µA at 6 V), high noise immunity (VIH = 3.15 V min at VCC = 4.5 V), and rail-to-rail output swing (VOH ≥ 3.98 V, VOL ≤ 0.26 V at 4.5 V with 6 mA load).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports mixed-voltage system interfacing and brown-out tolerant operation |
| Operating Temperature | −55°C to 125°C - qualified for military-grade and harsh-environment applications |
| Output Drive | ±7.8 mA per Y output - drives up to 15 LSTTL loads directly without external buffers |
| Propagation Delay | 13–34 ns at VCC = 4.5 V - enables reliable timing in 20–30 MHz bus clock domains |
| 3-State Enable Time | 15–45 ns at VCC = 4.5 V - ensures clean bus arbitration during hot-swap or dynamic reconfiguration |
| Input Capacitance | 10 pF max - minimizes loading on upstream logic and preserves signal integrity |
| Quiescent Current | 160 µA max at 6 V - enables low-power standby modes in battery-backed or energy-constrained systems |
Pinout & Package
SN74HC244MDWREP is housed in a 20-pin SOIC (DW) package with 0.30-inch body width, 1.27 mm lead pitch, and 2.65 mm maximum height. Pin 1 index is located in quadrant Q1 per tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Section Output-Enable Inputs | Active-low enables independently isolate each 4-bit buffer group onto shared bus lines |
| 1A1–1A4, 2A1–2A4 | Data Inputs | Noninverting inputs accepting TTL/CMOS logic levels; tolerate 0 V to VCC |
| 1Y1–1Y4, 2Y1–2Y4 | Buffered Outputs | 3-state outputs with ±7.8 mA sink/source capability; high-impedance when OE = high |
| VCC (Pin 20) | Positive Supply | Power rail for logic core and output drivers; decoupling required within 10 mm |
| GND (Pin 10) | Ground Reference | Common return path for all inputs, outputs, and internal circuitry; must be low-impedance |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit sections | Enables concurrent control of two bus segments or memory banks with minimal PCB routing |
| Controlled Baseline manufacturing | Single assembly/test site and fabrication site ensure consistent parametric performance across production lots |
| Enhanced DMS support | Guarantees long-term component availability and supply continuity for legacy military/aerospace programs |
| JEDEC-qualified reliability | HAST, temperature cycling, and bond intermetallic testing validate operation over full −55°C to 125°C range |
| High-current 3-state outputs | Eliminates need for external bus transceivers in medium-density address/data path designs |
Applications
| Memory Address Buffering | Industrial Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from microcontroller to SRAM or Flash memory in programmable logic controllers. IC Role / Device Role / Timing Role: Noninverting buffer isolating CPU address bus from memory module; provides current gain and noise margin. Use Value: Enables direct connection to 15 LSTTL loads while maintaining <34 ns propagation delay for sub-30 MHz memory access timing. | Use Scenario: Level-shifting and bus-driving between FPGA I/O banks and legacy parallel peripheral interfaces. IC Role / Device Role / Timing Role: Bidirectional-capable 3-state buffer managing shared control/data lines in modular I/O backplanes. Use Value: Independent OE pins allow precise timing control of bus release, preventing contention during hot-plug events. |
| Aerospace Avionics Backplane | Ruggedized Data Acquisition |
Use Scenario: Interfacing radiation-tolerant processor modules to sensor acquisition cards in satellite payload subsystems. IC Role / Device Role / Timing Role: Temperature-hardened bus driver ensuring signal integrity across wide thermal gradients in vacuum environments. Use Value: −55°C to 125°C qualification and HAST-tested reliability meet MIL-PRF-38535 Class V requirements. | Use Scenario: Isolating analog-to-digital converter control signals from noisy digital power domains in oilfield downhole tools. IC Role / Device Role / Timing Role: Low-noise, high-immunity buffer protecting ADC configuration registers from EMI-induced glitches. Use Value: 3.15 V VIH minimum at 4.5 V supply provides >1.3 V noise margin against conducted interference. |
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 |
|---|---|---|---|
| SN74HC244QDWREP | Same SOIC-20 package and pinout; rated for −40°C to 125°C instead of −55°C to 125°C | Suitable for automotive and extended-industrial use but not certified for full military temperature range | Select SN74HC244QDWREP if −40°C lower limit suffices and cost optimization is prioritized |
| SN54HC244 | Military QML-38535 Class V qualified; identical logic function and pinout; requires MIL-STD-883 testing documentation | Required for DoD procurement with full traceability and lot acceptance testing; higher cost and longer lead times | Choose SN54HC244 only when formal QML certification and test reports are contractually mandated |
Compared with SN74HC244MDWREP, SN74HC244QDWREP offers identical functionality at reduced temperature coverage, while SN54HC244 adds formal military qualification overhead without electrical or mechanical differentiation - making SN74HC244MDWREP the optimal balance of ruggedness, availability, and documentation for defense-adjacent industrial programs.
Availability
SN74HC244MDWREP is available at Aetrix Electronics and suitable for memory address buffering, industrial bus interface, aerospace avionics backplane, and ruggedized data acquisition requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SN74HC244MDWREP 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions with deep expertise in high-reliability and extended-temperature components.
The SN74HC244MDWREP belongs to TI's enhanced-product (EP) logic family, engineered specifically for mission-critical industrial, defense, and aerospace applications where guaranteed long-term supply and extreme environmental resilience are mandatory.
FAQ
What is the operating temperature range specified for SN74HC244MDWREP?
The SN74HC244MDWREP is rated for continuous operation from −55°C to 125°C ambient temperature. This extended range is validated through JEDEC-compliant accelerated stress testing including HAST, temperature cycling, and bond intermetallic life evaluation - confirming suitability for military, aerospace, and downhole industrial deployments where thermal extremes are routine. The M-suffix explicitly denotes this −55°C lower limit.
Does SN74HC244MDWREP support true 3-state outputs, and how is output enable controlled?
Yes, SN74HC244MDWREP provides true 3-state (high-impedance) outputs on all eight Y terminals. Each of the two 4-bit sections has its own active-low output-enable input: 1OE controls Y1–Y4, and 2OE controls Y5–Y8. When the respective OE pin is driven high, the corresponding outputs enter high-Z mode regardless of A-input states - enabling clean bus sharing without contention. This behavior is confirmed in the device's function table and timing diagrams.
What package type and lead finish does SN74HC244MDWREP use?
SN74HC244MDWREP is supplied in a 20-pin SOIC (DW) package measuring 7.5 mm × 12.8 mm with 1.27 mm lead pitch and 2.65 mm maximum height. Its lead finish is matte tin (NIPDAU), compliant with RoHS and qualified for peak reflow temperatures up to 260°C under JEDEC Level-1 moisture sensitivity rating - supporting standard automated SMT assembly processes without special handling.
How does SN74HC244MDWREP differ from the commercial SN74HC244 in terms of reliability and qualification?
SN74HC244MDWREP is an enhanced-product (EP) variant with Controlled Baseline manufacturing, extended −55°C to 125°C temperature qualification, JEDEC-reliability testing (HAST, temperature cycling), and Diminishing Manufacturing Sources (DMS) support - unlike the commercial SN74HC244 which lacks formal extended-temperature validation or long-term supply guarantees. These enhancements make SN74HC244MDWREP appropriate for defense and critical infrastructure where lifecycle assurance is non-negotiable.
Can SN74HC244MDWREP drive standard TTL loads, and what is its maximum output current capability?
Yes, SN74HC244MDWREP is explicitly characterized to drive up to 15 LSTTL loads per output, verified by its ±7.8 mA output current specification at VCC = 6 V. This high-current capability allows direct interfacing with legacy TTL circuits without level-shifting or buffering - a key design advantage confirmed in the device's "Features" section and electrical characteristics tables under IOL/IOH conditions.
SN74HC244MDWREP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -55°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74HC244MDWREP FAQ
1.How can I place an order for SN74HC244MDWREP through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC244MDWREP 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 SN74HC244MDWREP reliable?
The price and inventory of SN74HC244MDWREP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC244MDWREP is usually 5 days.
3.What payment methods are accepted for SN74HC244MDWREP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC244MDWREP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC244MDWREP?
SN74HC244MDWREP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC244MDWREP 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 SN74HC244MDWREP?
For technical support, including SN74HC244MDWREP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC244MDWREP requirements.
6.How does Aetrix verify that SN74HC244MDWREP is sourced from the original manufacturer or authorized distributors?
All SN74HC244MDWREP 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 SN74HC244MDWREP meets industry standards.
7.What is the process for return or replacement of SN74HC244MDWREP?
All SN74HC244MDWREP units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC244MDWREP, 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 SN74HC244MDWREP part is unused and in its original packaging.
Return procedure for SN74HC244MDWREP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74HC244MDWREP 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…
