My Inquiry
My Account
Texas Instruments SN74HC244QPWRQ1
- Part No.:
- SN74HC244QPWRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC244QPWRQ1.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,368
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74HC244QPWRQ1 from Texas Instruments is an automotive-qualified octal buffer and line driver with 3-state outputs, designed for memory address buffering, bus interfacing, and clock distribution. It operates from 2 V to 6 V, delivers ±6 mA output drive at 5 V, features typical propagation delay of 11 ns, and supports −40°C to +125°C operation in TSSOP-20 packaging.
For engineers reviewing the SN74HC244QPWRQ1 datasheet, SN74HC244QPWRQ1 pinout, SN74HC244QPWRQ1 application, or SN74HC244QPWRQ1 equivalent, key selection criteria include 3-state bus-driving capability, automotive AEC-Q100 qualification, low ICC (≤160 μA), high-current drive (±6 mA @ 5 V), and compatibility with LSTTL loads.
Technical Context
The SN74HC244QPWRQ1 implements two independent 4-bit noninverting buffers, each with dedicated output-enable (OE) control. Its CMOS architecture ensures rail-to-rail input thresholds and high noise immunity across the full 2–6 V supply range.
Each buffer passes data transparently when OE is low and enters high-impedance state when OE is high - enabling bidirectional bus control without external logic. Input leakage remains ≤1 μA, and output clamp current withstands ±20 mA, supporting robust system-level ESD resilience per MIL-STD-883.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V systems without level translation |
| Output Drive Current | ±6 mA at 5 V - sufficient to drive 15 LSTTL loads or terminate stubbed bus traces |
| Propagation Delay | Typical 11 ns at 4.5 V - supports reliable timing in sub-25 MHz address/data paths |
| Quiescent ICC | Max 160 μA - minimizes standby power in always-on automotive modules |
| Operating Temperature | −40°C to +125°C - qualified for engine bay, ADAS, and infotainment under AEC-Q100 Grade 1 |
| Input Leakage | Max ±1 μA - prevents unintended logic transitions on unterminated inputs |
| 3-State Enable Time | Typical 26 ns (tdis) at 6 V - ensures clean bus release before next driver activation |
Pinout & Package
TSSOP-20 package (6.50 mm × 4.40 mm, 1.2 mm max height), lead-free NIPDAU finish, MSL Level-1, RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit buffer group; high = high-Z output |
| 1A1–1A4, 2A1–2A4 | Buffer input | Noninverting data inputs for respective buffer sections |
| 1Y1–1Y4, 2Y1–2Y4 | Buffer output | 3-state outputs mirroring corresponding A inputs when OE is low |
| VCC, GND | Power supply | Single-supply operation; requires local 0.1-μF bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Automotive-grade reliability certified for safety-critical vehicle subsystems |
| 3-State Bus Interface | Enables multi-driver shared-bus architectures without contention or signal collisions |
| High-Current Output Drive | ±6 mA at 5 V supports direct connection to legacy LSTTL loads without external buffers |
| Low Power Consumption | ICC ≤ 160 μA ensures minimal contribution to system-level quiescent current budgets |
| Wide Supply Range | 2–6 V operation allows seamless integration into mixed-voltage automotive domains (e.g., 3.3 V MCU + 5 V sensor interface) |
Applications
| Memory Address Buffering | Automotive CAN Bus Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to external SRAM or flash memory in an ADAS domain controller. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating MCU address bus from memory load; enables memory sharing between multiple masters. Use Value: Prevents address bus contention during DMA transfers and reduces capacitive loading to maintain setup/hold timing margins. | Use Scenario: Level-shifting and isolating CAN transceiver TXD/RXD signals from a 3.3 V MCU in a body control module. IC Role / Device Role / Timing Role: Signal conditioning buffer between MCU GPIO and CAN controller; provides voltage translation and drive strength enhancement. Use Value: Ensures robust signal integrity over longer PCB traces and mitigates ground bounce in noisy automotive environments. |
| Instrument Cluster Display Driver | Infotainment System Clock Distribution |
Use Scenario: Buffering parallel RGB data and control signals (HSYNC/VSYNC/DE) from SoC to TFT display panel in digital instrument cluster. IC Role / Device Role / Timing Role: High-speed data path buffer with precise edge control; enables fan-out to multiple display IC inputs. Use Value: Maintains signal fidelity across 24-bit RGB buses operating up to 25 MHz, reducing jitter-induced color artifacts. | Use Scenario: Distributing a 24 MHz system clock from PMIC to multiple audio codec, DSP, and touch controller ICs in head unit design. IC Role / Device Role / Timing Role: Low-skew clock buffer with 3-state enable for dynamic clock gating during sleep modes. Use Value: Reduces clock tree skew and eliminates switching noise during processor idle states via OE-controlled shutdown. |
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 |
|---|---|---|---|
| SN74LVC244APWR | Lower VCC range (1.65–3.6 V); higher speed (tpd = 5.3 ns @ 3.3 V); non-automotive grade | Not AEC-Q100 qualified; unsuitable for under-hood or safety-critical use | Select only for cost-sensitive consumer or industrial designs requiring 3.3 V operation and faster timing |
| MC74VHC244DT | Wider VCC range (2–5.5 V); identical pinout; AEC-Q100 Grade 2 (−40°C to +105°C) | Limited temperature range vs. SN74HC244QPWRQ1's Grade 1 (−40°C to +125°C) | Acceptable for cabin-mounted modules where ambient temperature stays below 105°C |
Compared with SN74LVC244APWR and MC74VHC244DT, the SN74HC244QPWRQ1 uniquely combines full automotive Grade 1 temperature support, 2–6 V flexibility, and proven system-level ESD robustness - making it the preferred choice for engine control, braking, and ADAS applications demanding long-term reliability.
Availability
SN74HC244QPWRQ1 is available at Aetrix Electronics and suitable for automotive ADAS, body electronics, and infotainment systems requiring stable component supply, AEC-Q100 compliance, and long-lifecycle availability.
Supply support for SN74HC244QPWRQ1 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 delivering analog, embedded processing, and connectivity solutions for automotive, industrial, and personal electronics markets.
The SN74HC244QPWRQ1 belongs to TI's automotive logic portfolio, engineered specifically to meet stringent AEC-Q100 requirements while delivering high-density, low-power buffering for memory, bus, and clock subsystems in modern vehicles.
FAQ
What is the maximum operating temperature for the SN74HC244QPWRQ1?
The SN74HC244QPWRQ1 is rated for operation from −40°C to +125°C and is AEC-Q100 Grade 1 qualified, making it suitable for under-hood automotive applications including engine control units and transmission controllers where ambient temperatures exceed 105°C.
Does the SN74HC244QPWRQ1 support 3.3 V logic levels?
Yes, the SN74HC244QPWRQ1 supports 3.3 V operation within its 2 V to 6 V supply range. At VCC = 3.3 V, VIH is 2.31 V and VIL is 0.99 V per datasheet specifications, ensuring reliable interfacing with standard 3.3 V CMOS and LVTTL logic families.
How many independent buffer groups does the SN74HC244QPWRQ1 contain?
The SN74HC244QPWRQ1 contains two independent 4-bit noninverting buffer groups, each controlled by its own active-low output-enable input (1OE and 2OE), allowing selective activation of eight total outputs in split-bus or dual-peripheral configurations.
What is the typical propagation delay of the SN74HC244QPWRQ1 at 5 V?
The typical propagation delay (tpd) of the SN74HC244QPWRQ1 is 11 ns at VCC = 5 V and TA = 25°C with CL = 50 pF, as specified in the switching characteristics table of the official datasheet revision C (June 2022).
Is the SN74HC244QPWRQ1 pin-compatible with other members of the SN74HC244-Q1 family?
Yes, the SN74HC244QPWRQ1 shares identical pinout and functionality with SN74HC244QDWRQ1 (SOIC-20) and SN74HC244QPWRG4Q1 (TSSOP-20), differing only in package type and marking - enabling drop-in replacement across board revisions without layout changes.
SN74HC244QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- 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:
- 7.8mA, 7.8mA
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74HC244QPWRQ1 FAQ
1.How can I place an order for SN74HC244QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC244QPWRQ1 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 SN74HC244QPWRQ1 reliable?
The price and inventory of SN74HC244QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC244QPWRQ1 is usually 5 days.
3.What payment methods are accepted for SN74HC244QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC244QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC244QPWRQ1?
SN74HC244QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC244QPWRQ1 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 SN74HC244QPWRQ1?
For technical support, including SN74HC244QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC244QPWRQ1 requirements.
6.How does Aetrix verify that SN74HC244QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74HC244QPWRQ1 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 SN74HC244QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74HC244QPWRQ1?
All SN74HC244QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC244QPWRQ1, 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 SN74HC244QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74HC244QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74HC244QPWRQ1 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…
