My Inquiry
My Account
Texas Instruments SN74AHC244QDWRG4Q1
- Part No.:
- SN74AHC244QDWRG4Q1
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC244QDWRG4Q1.pdf
- Description:
- IC BUF NON-INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,895
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74AHC244QDWRG4Q1 from Texas Instruments is an automotive-qualified octal 3-state buffer/driver IC used for bus interfacing, memory address driving, and clock distribution in safety-critical vehicle systems. It operates from 2 V to 5.5 V, supports −40°C to +125°C ambient temperature, delivers ±8 mA output drive at 5 V, and features dual independent 4-bit channels with separate output-enable (OE) controls.
For engineers reviewing the SN74AHC244QDWRG4Q1 datasheet, SN74AHC244QDWRG4Q1 pinout, SN74AHC244QDWRG4Q1 application, or SN74AHC244QDWRG4Q1 equivalent, this page provides verified functional modes, switching timing under 15 pF/50 pF loads, thermal resistance (81.1°C/W), noise immunity specs, and automotive-grade ESD performance (±1500 V HBM).
Technical Context
The SN74AHC244QDWRG4Q1 implements two independent 4-bit non-inverting buffers, each with dedicated 3-state output-enable (OE) control. Its EPIC™ CMOS process ensures rail-to-rail input compatibility and low static current (ICC ≤ 40 μA) across the full 2–5.5 V supply range.
Each channel operates in three defined states: pass-through (OE low), high-impedance (OE high), or power-up safe state when OE is pulled up to VCC. Switching performance is characterized at both 3.3 V (tPLH/tPHL = 5.8–11.9 ns) and 5 V (tPLH/tPHL = 3.9–8.5 ns) with 15 pF and 50 pF loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports wide-input automotive power rails including 3.3 V and 5 V logic domains. |
| IOH/IOL | ±8 mA at 5 V - sufficient to drive standard TTL loads and multiple CMOS inputs without external buffering. |
| tPLH / tPHL | 3.9 ns (min) at 5 V, 15 pF - enables high-speed bus buffering in ADAS sensor interfaces and infotainment backplanes. |
| Operating Temp | −40°C to +125°C - qualified per AEC-Q100 Grade 1 for engine bay and powertrain applications. |
| ESD Rating | ±1500 V HBM - meets automotive ESD robustness requirements for in-vehicle assembly and field operation. |
| ICC (max) | 40 μA at 5.5 V - ultra-low quiescent current supports always-on modules with strict leakage budgets. |
| RθJA | 81.1°C/W (DW package) - enables thermal design margin for SOIC-20 mounting on standard 2-layer PCBs. |
Pinout & Package
SN74AHC244QDWRG4Q1 is supplied in a 20-pin SOIC (DW) package measuring 12.80 mm × 10.3 mm (body: 12.8 mm × 7.5 mm), RoHS-compliant, with NIPDAU lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable controls for Channel 1 (pins 2–9, 12, 14, 16, 18) and Channel 2 (pins 11, 13, 15, 17, 12, 14, 16, 18). |
| 2, 4, 6, 8, 11, 13, 15, 17 | 1A1–1A4, 2A1–2A4 | Eight buffered input terminals - non-inverting, CMOS-compatible, VIH/VIL defined across VCC range. |
| 3, 5, 7, 9, 12, 14, 16, 18 | 2Y4–2Y1, 1Y4–1Y1 | Eight 3-state outputs - high-impedance when respective OE is high; driven low/high otherwise. |
| 10 | GND | Ground reference for all I/O and internal circuitry; must be low-impedance connection in automotive layouts. |
| 20 | VCC | Primary power supply pin - requires local 0.1 μF bypass capacitor per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Grade 1 (−40°C to +125°C) qualification confirmed - suitable for powertrain, chassis, and body control modules. |
| Dual Independent Channels | Two 4-bit groups with separate OE pins enable selective bus isolation - critical for fault-containment in domain controllers. |
| Wide Supply Range | 2 V to 5.5 V operation allows interoperability between legacy 5 V and modern 3.3 V subsystems without level shifters. |
| Low Dynamic Power | Cpd = 8.6 pF at 5 V - minimizes switching noise and power loss in high-frequency clock distribution paths. |
| Robust Noise Immunity | VIL(D) = 1.5 V, VIH(D) = 3.5 V at 5 V - provides ≥0.5 V noise margin against coupled transients in noisy automotive harnesses. |
Applications
| Automotive Body Control Module (BCM) | ADAS Camera Interface Buffer |
|---|---|
Use Scenario: Isolating microcontroller GPIOs from high-capacitance door lock actuator wiring harnesses. IC Role / Device Role / Timing Role: 3-state buffer enabling bidirectional signal routing while preventing backfeed during sleep mode. Use Value: Prevents unintended actuation during MCU reset by holding outputs in high-Z until firmware initializes OE control. |
Use Scenario: Driving parallel MIPI CSI-2 clock or sync signals across long PCB traces to image sensors. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer maintaining signal integrity for 100+ MHz pixel clocks. Use Value: Delivers <8.5 ns propagation delay at 5 V/15 pF - preserves setup/hold margins for camera data capture timing. |
| Infotainment Head Unit Bus Expansion | Electric Power Steering (EPS) Diagnostic Interface |
Use Scenario: Expanding UART or SPI peripheral count via shared bus segments with dynamic device selection. IC Role / Device Role / Timing Role: Octal buffer enabling time-multiplexed access to multiple CAN transceivers or audio codecs. Use Value: Dual OE pins allow independent gating of two 4-bit sub-buses - simplifies arbitration logic and reduces gate count. |
Use Scenario: Level-shifting and isolating diagnostic lines between 3.3 V MCU and 5 V legacy motor driver ICs. IC Role / Device Role / Timing Role: Voltage-tolerant buffer providing bidirectional signal conditioning for UDS (ISO 14229) diagnostics. Use Value: 2–5.5 V VCC range eliminates need for external level translators - reduces BOM cost and board space. |
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 |
|---|---|---|---|
| SN74AHC244QPWRG4Q1 | TSSOP-20 (6.5 mm × 6.4 mm); RθJA = 116.8°C/W; same electrical specs and AEC-Q100 Grade 1 rating. | Better PCB area efficiency but higher thermal resistance - requires enhanced copper pour or airflow in thermally constrained zones. | Select when board space is limited and thermal management can be augmented via layout. |
| SN74LV244AQPWRG4Q1 | Lower VCC range (1.65–5.5 V); 16 mA IOL at 3.3 V; identical pinout and function; LV family offers improved noise margin at 3.3 V. | Superior performance in 3.3 V-only domains (e.g., radar SoCs); not recommended for mixed 2.5 V/5 V systems due to VIH minimum. | Prefer for new 3.3 V-centric designs where higher drive strength and lower VIL improve noise immunity. |
Compared with SN74AHC244QPWRG4Q1 and SN74LV244AQPWRG4Q1, SN74AHC244QDWRG4Q1 offers the lowest thermal resistance in SOIC packaging and widest supply voltage flexibility - making it optimal for legacy 5 V automotive modules requiring proven reliability and ease of thermal validation.
Availability
SN74AHC244QDWRG4Q1 is available at Aetrix Electronics and suitable for automotive body control, ADAS sensor interface, and infotainment bus expansion applications requiring stable component supply across extended product lifecycles.
Supply support for SN74AHC244QDWRG4Q1 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 automotive-grade silicon with over 50 years of automotive qualification experience.
The SN74AHC244-Q1 belongs to TI's AHC logic family designed specifically for high-reliability automotive bus interfacing, offering rail-to-rail operation, AEC-Q100 compliance, and robust ESD tolerance in harsh environments.
FAQ
What is the maximum operating temperature for SN74AHC244QDWRG4Q1?
The SN74AHC244QDWRG4Q1 is rated for continuous operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This specification is validated across the full 2 V to 5.5 V supply range and applies to both DW (SOIC) and PW (TSSOP) package variants. Thermal derating is not required within this range when mounted per TI's recommended PCB layout guidelines.
Does SN74AHC244QDWRG4Q1 support 3.3 V logic levels?
Yes, SN74AHC244QDWRG4Q1 fully supports 3.3 V operation: VIH = 2.1 V (min) and VIL = 0.9 V (max) at VCC = 3.3 V, providing >0.6 V DC noise margin. Its EPIC™ CMOS process ensures clean switching and low ICC (<10 μA typical) at 3.3 V, making it suitable for mixed-voltage automotive domains such as instrument clusters and telematics gateways.
How many independent output-enable controls does SN74AHC244QDWRG4Q1 have?
SN74AHC244QDWRG4Q1 has two independent active-low output-enable inputs: 1OE (Pin 1) controls outputs Y1–Y4 of Channel 1, and 2OE (Pin 19) controls outputs Y1–Y4 of Channel 2. This dual-OE architecture enables selective bus isolation - for example, disabling one 4-bit segment while keeping the other active during partial system wake-up sequences.
What is the propagation delay of SN74AHC244QDWRG4Q1 at 5 V with 15 pF load?
At VCC = 5 V ± 0.5 V and CL = 15 pF, SN74AHC244QDWRG4Q1 exhibits tPLH and tPHL values of 3.9 ns (min) to 6.5 ns (max), and tPZH/tPZL of 4.7–8.5 ns. These values are measured under controlled conditions per JEDEC standards and reflect worst-case performance across temperature and process corners - critical for timing closure in high-speed automotive serial buses.
Is SN74AHC244QDWRG4Q1 pin-compatible with standard SN74AHC244 devices?
Yes, SN74AHC244QDWRG4Q1 shares identical pinout, electrical behavior, and functional logic with the commercial SN74AHC244, including the same 20-pin SOIC (DW) footprint. The "Q1" suffix denotes AEC-Q100 qualification and enhanced screening - no PCB layout changes are needed when upgrading from industrial-grade to automotive-grade versions.
SN74AHC244QDWRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74AHC244QDWRG4Q1 FAQ
1.How can I place an order for SN74AHC244QDWRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC244QDWRG4Q1 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 SN74AHC244QDWRG4Q1 reliable?
The price and inventory of SN74AHC244QDWRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC244QDWRG4Q1 is usually 5 days.
3.What payment methods are accepted for SN74AHC244QDWRG4Q1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC244QDWRG4Q1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC244QDWRG4Q1?
SN74AHC244QDWRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC244QDWRG4Q1 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 SN74AHC244QDWRG4Q1?
For technical support, including SN74AHC244QDWRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC244QDWRG4Q1 requirements.
6.How does Aetrix verify that SN74AHC244QDWRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74AHC244QDWRG4Q1 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 SN74AHC244QDWRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74AHC244QDWRG4Q1?
All SN74AHC244QDWRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC244QDWRG4Q1, 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 SN74AHC244QDWRG4Q1 part is unused and in its original packaging.
Return procedure for SN74AHC244QDWRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74AHC244QDWRG4Q1 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…
