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Texas Instruments SN74HC244PWR
- Part No.:
- SN74HC244PWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC244PWR.pdf
- Description:
- IC BUFFER NON-INVERT 6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:8,836
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Product details
Overview
SN74HC244PWR from Texas Instruments is an octal noninverting 3-state buffer/line driver IC used for bus interfacing, memory address driving, and I/O expansion in digital systems. It operates from 2V to 6V, delivers ±6mA output drive at 5V, exhibits typical propagation delay of 11ns (VCC = 6V, CL = 50pF), and consumes ≤80µA ICC (max) - enabling low-power, high-density bus buffering in industrial controllers and telecom infrastructure.
For engineers reviewing the SN74HC244PWR datasheet, SN74HC244PWR pinout, SN74HC244PWR application, or SN74HC244PWR equivalent, this page provides verified functional identity, TSSOP-20 package mapping, 3-state control timing, drive capability, thermal metrics, and validated alternative options for bus isolation and signal fan-out design.
Technical Context
The SN74HC244PWR implements two independent 4-bit noninverting buffer banks, each controlled by a dedicated output-enable (OE) input. When OE is low, inputs A1–A4 pass directly to outputs Y1–Y4 with no inversion; when OE is high, all four outputs enter high-impedance state - enabling bidirectional bus sharing without contention.
It uses standard CMOS inputs with ≤1µA max input current and supports load capacitances up to 150pF. Switching performance is characterized across temperature (–40°C to 125°C) and supply voltage (2V–6V), with enable/disable times as low as 13ns (VCC = 6V, CL = 50pF), making it suitable for medium-speed synchronous bus architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2V to 6V - compatible with 3.3V and 5V logic domains without level translation |
| Output Drive | ±6mA at 5V - sufficient to drive 15 LSTTL loads or terminate short PCB traces |
| Propagation Delay (tpd) | 11ns typical (VCC = 6V, CL = 50pF) - supports >30 MHz bus clocking in point-to-point configurations |
| Quiescent Current (ICC) | 80µA maximum - enables use in always-on monitoring circuits with minimal standby power impact |
| Input Leakage Current | ±1µA maximum - ensures reliable logic thresholds even with weak pull-ups or high-impedance sources |
| 3-State Enable Time (ten) | 13ns typical (VCC = 6V, CL = 50pF) - allows fast bus arbitration and dynamic resource allocation |
| ESD Rating (HBM) | ±2000V - meets industrial handling requirements without additional protection circuitry |
Pinout & Package
TSSOP-20 package (PW), 6.5mm × 6.4mm body size, 0.65mm pitch, surface-mount, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output-enable inputs - independently control Bank 1 (pins 2,4,6,8 → 18,16,14,12) and Bank 2 (pins 11,13,15,17 → 9,7,5,3) |
| 2,4,6,8 | 1A1–1A4 | Bank 1 input signals - routed to corresponding Y outputs only when 1OE = low |
| 11,13,15,17 | 2A1–2A4 | Bank 2 input signals - routed to corresponding Y outputs only when 2OE = low |
| 18,16,14,12 | 1Y1–1Y4 | Bank 1 buffered outputs - high-impedance when 1OE = high |
| 9,7,5,3 | 2Y1–2Y4 | Bank 2 buffered outputs - high-impedance when 2OE = high |
| 10 | GND | Ground reference for all logic and output stages - must be low-impedance connection |
| 20 | VCC | Positive supply rail - requires local 0.1µF bypass capacitor per TI layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-bit banks | Enables selective bus segmentation - e.g., isolate memory address lines from peripheral data lines using separate OE controls |
| 3-state outputs with fast enable/disable | ten/tdis ≤13ns (6V, 50pF) - supports time-critical bus arbitration in real-time control systems |
| High noise immunity | VIH ≥3.15V / VIL ≤1.35V at VCC = 4.5V - ensures robust operation in electrically noisy industrial environments |
| Low dynamic power consumption | Cpd = 35pF per buffer - minimizes switching current in high-frequency address/data bus applications |
| Wide temperature range | Specified from –40°C to +125°C - qualified for under-hood automotive modules and base station equipment |
Applications
| Server Memory Interface | LED Display Column Driver |
|---|---|
|
Use Scenario: Buffering CPU address lines to multiple DDR memory modules on a dense server motherboard. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating shared address bus between memory controller and DIMM slots during refresh cycles. Use Value: Prevents bus contention during concurrent access; ±6mA drive sustains signal integrity across 8-layer backplane traces up to 15 cm. |
Use Scenario: Driving column segments of a 16×64 LED matrix in industrial HMIs with PWM dimming. IC Role / Device Role / Timing Role: High-current line driver translating microcontroller GPIO outputs to LED column sink paths. Use Value: 11ns tpd ensures precise column scan timing at 1kHz refresh; 3-state mode enables multiplexed row/column addressing. |
| Industrial Network Switch Backplane | Motor Control I/O Expander |
|
Use Scenario: Isolating management interface signals (I²C, SPI) between switch ASIC and supervisory MCU across PCB partitions. IC Role / Device Role / Timing Role: Bidirectional bus buffer enabling hot-swap-safe communication over shared control bus. Use Value: Dual OE pins allow independent enable/disable of control and status channels; 2V–6V range supports mixed-voltage subsystems. |
Use Scenario: Extending GPIO count for stepper motor phase sequencing and limit-switch monitoring in PLC-based motion controllers. IC Role / Device Role / Timing Role: Logic-level translator and current booster between 3.3V FPGA I/O and 5V optocoupled motor drivers. Use Value: 1µA max II eliminates need for external pull resistors; 125°C rating matches industrial enclosure thermal profiles. |
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 |
|---|---|---|---|
| 74HC244D,653 (Nexperia) | SOIC-20 package; identical logic function and DC specs; tpd = 13ns (typ, 5V, 50pF) | Same bus buffering role but lacks TSSOP footprint - requires PCB redesign for space-constrained layouts | Select when SOIC assembly infrastructure is already in place and board area is not constrained. |
| MC74HC244ADTR2G (onsemi) | TSSOP-20; same pinout; slightly higher ICC (100µA max); tpd = 12ns (typ, 5V, 50pF) | Valid for identical use cases but has different MSL3 reflow profile and longer lead time at distribution | Choose for dual-sourcing where TI supply continuity is uncertain; verify thermal derating at 125°C. |
Compared with SN74HC244PWR, the Nexperia 74HC244D offers identical functionality in SOIC but sacrifices compactness, while the onsemi MC74HC244ADTR2G matches the TSSOP-20 footprint and pinout but trades marginal speed and power for second-source assurance - both require validation of enable timing margins in high-speed bus arbitration.
Availability
SN74HC244PWR is available at Aetrix Electronics and suitable for industrial network switches, LED display controllers, and motor drive I/O expanders requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74HC244PWR 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 decades of expertise in high-reliability industrial and automotive-grade components.
The SN74HC244PWR belongs to TI's 74HC logic family, designed for robust, low-power bus interfacing in noise-prone environments - emphasizing signal integrity, wide voltage operation, and thermal resilience for mission-critical control systems.
FAQ
What is the operating temperature range for SN74HC244PWR?
The SN74HC244PWR is rated for operation from –40°C to +125°C, as confirmed in Section 5.3 of the official Texas Instruments datasheet (SCLS130I, February 2026 revision). This extended range qualifies it for under-hood automotive modules, industrial PLCs, and telecom base station equipment where ambient temperatures exceed standard commercial limits. The SN74HC244PWR maintains full electrical specifications across this range, including VOH/VOL and tpd performance.
Does SN74HC244PWR support 3.3V logic levels?
Yes, SN74HC244PWR fully supports 3.3V operation: its recommended supply range is 2V to 6V, and VIH is specified as 2.0V min (at VCC = 3.3V), ensuring reliable high-level recognition from 3.3V CMOS outputs. VOH exceeds 3.1V at IOL = 6mA, allowing direct interfacing with 3.3V inputs without level shifters - verified in Electrical Characteristics Table 5.5 and 5.8.
How many independent output-enable controls does SN74HC244PWR have?
The SN74HC244PWR has two independent active-low output-enable inputs: 1OE (Pin 1) controls Bank 1 outputs (1Y1–1Y4), and 2OE (Pin 19) controls Bank 2 outputs (2Y1–2Y4). This dual-OE architecture enables selective bus partitioning - for example, holding memory address lines active while disabling peripheral data lines during DMA transfers - as defined in the Function Table (Section 7.4) and Pin Configuration (Figure 4-1).
What is the maximum capacitive load SN74HC244PWR can drive reliably?
SN74HC244PWR is characterized up to 150pF load capacitance, with switching parameters (tpd, ten, tt) fully specified at both CL = 50pF and CL = 150pF across voltage and temperature ranges (Sections 5.10–5.11). At VCC = 6V and TA = 25°C, tpd remains ≤20ns even at 150pF. For reliable operation beyond 150pF, TI recommends adding series damping resistors or reducing trace length per Layout Guidelines (Section 8.4).
Is SN74HC244PWR pin-compatible with other 74HC244 variants?
Yes, SN74HC244PWR shares identical pinout and logic function with all industry-standard 74HC244 devices in TSSOP-20 (PW) package, including 74HC244PW, 74HC244T, and MC74HC244ADTR2G. Pin numbering, terminal roles (e.g., 1OE, 1A1, 1Y1), and electrical behavior match per JEDEC MS-012 and TI's mechanical drawings - confirmed in Package Information (Section 4) and Pin Configuration (Figure 4-1).
SN74HC244PWR 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74HC244PWR FAQ
1.How can I place an order for SN74HC244PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC244PWR 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 SN74HC244PWR reliable?
The price and inventory of SN74HC244PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC244PWR is usually 5 days.
3.What payment methods are accepted for SN74HC244PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC244PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74HC244PWR?
SN74HC244PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC244PWR 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 SN74HC244PWR?
For technical support, including SN74HC244PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC244PWR requirements.
6.How does Aetrix verify that SN74HC244PWR is sourced from the original manufacturer or authorized distributors?
All SN74HC244PWR 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 SN74HC244PWR meets industry standards.
7.What is the process for return or replacement of SN74HC244PWR?
All SN74HC244PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC244PWR, 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 SN74HC244PWR part is unused and in its original packaging.
Return procedure for SN74HC244PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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