SN74LVC244APWR - Octal Buffer/Driver 3-State | Texas Instruments
MPN: SN74LVC244APWR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.42 | $0.42 |
| 10 | $0.36 | $3.60 |
| 100 | $0.28 | $28.00 |
| 500 | $0.22 | $110.00 |
| 1,000 | $0.18 | $180.00 |
Drop-in alternatives for SN74LVC244APWR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
SN74LVC244APWRG4
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC244APW
β Drop-Inπ Reference alternative (not in catalog)
SN74LV244APWR
β Drop-Inπ Reference alternative (not in catalog)
74LVC244APW-Q100
β Drop-Inπ Reference alternative (not in catalog)
SN74LVC244APWR Maximum Ratings & Electrical Characteristics
| Logic Family | LVC |
| Number of Channels | 8 |
| Number of Elements | 2 |
| Bits per Element | 4 |
| Output Type | 3-State |
| Polarity | Non-Inverting |
| Supply Voltage Range | 1.65 V to 3.6 V |
| Operating Temperature Range | -40Β°C to 125Β°C |
| Package | TSSOP-20 (PW) |
| Mounting Type | Surface Mount |
| Propagation Delay Time | 4.3 ns (typical at 3.3 V) |
| Output Current | Β±24 mA at 3.3 V |
| Input Capacitance | 3 pF (typical) |
| ESD Protection | 2000-V HBM, 1000-V CDM |
| RoHS Status | Compliant |
SN74LVC244APWR Pin Configuration
| Pin 1 | 1OE β Output enable for section 1 (active low) |
| Pin 2 | 1A1 β Input for buffer 1 |
| Pin 3 | 1Y1 β Output for buffer 1 |
| Pin 4 | 1A2 β Input for buffer 2 |
| Pin 5 | 1Y2 β Output for buffer 2 |
| Pin 6 | 1A3 β Input for buffer 3 |
| Pin 7 | 1Y3 β Output for buffer 3 |
| Pin 8 | 1A4 β Input for buffer 4 |
| Pin 9 | 1Y4 β Output for buffer 4 |
| Pin 10 | GND β Ground |
| Pin 11 | 2Y4 β Output for buffer 8 |
| Pin 12 | 2A4 β Input for buffer 8 |
| Pin 13 | 2Y3 β Output for buffer 7 |
| Pin 14 | 2A3 β Input for buffer 7 |
| Pin 15 | 2Y2 β Output for buffer 6 |
| Pin 16 | 2A2 β Input for buffer 6 |
| Pin 17 | 2Y1 β Output for buffer 5 |
| Pin 18 | 2A1 β Input for buffer 5 |
| Pin 19 | 2OE β Output enable for section 2 (active low) |
| Pin 20 | VCC β Power supply |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
SN74LVC244APWR is suitable for 6 applications: Memory Address Buffering, Bus Interface for Data Acquisition, Level Shifting for Mixed-Voltage Systems, Clock Distribution, Industrial Control I/O Expansion, Telecommunications Line Interface.
Memory Address Buffering
The SN74LVC244APWR is used to buffer address lines between a microcontroller and external memory devices. Its 3-state outputs allow multiple memory banks to share the same address bus without contention. The wide supply voltage range (1.65 V to 3.6 V) ensures compatibility with both 1.8-V and 3.3-V memory interfaces. The high output drive (Β±24 mA) can handle the capacitive load of multiple memory chips, and the fast propagation delay (4.3 ns) minimizes access time. This makes it ideal for embedded systems where reliable address decoding and signal integrity are critical.
Recommended
Bus Interface for Data Acquisition
In data acquisition systems, the SN74LVC244APWR provides a clean interface between analog-to-digital converters (ADCs) and digital controllers. Its 3-state outputs enable multiple ADC channels to share a common data bus, reducing pin count on the controller. The device operates at 1.65 V to 3.6 V, matching the logic levels of modern ADCs and microcontrollers. The low propagation delay ensures high-speed data transfer, while the ESD protection (2000-V HBM) safeguards against electrostatic discharge during handling. This makes it a reliable choice for industrial and laboratory instrumentation.
Recommended
Level Shifting for Mixed-Voltage Systems
The SN74LVC244APWR can be used to shift logic levels between 1.8-V and 3.3-V domains in mixed-voltage systems. Its supply voltage range of 1.65 V to 3.6 V allows it to operate as a buffer that translates signals while maintaining signal integrity. The 3-state outputs prevent bus contention when multiple devices are connected. This is particularly useful in IoT devices and portable electronics where different components operate at different voltages. The device's high drive capability ensures that signals are not degraded when driving long traces or multiple loads.
Recommended
Clock Distribution
The SN74LVC244APWR is used to buffer and distribute clock signals to multiple loads in digital systems. Its low propagation delay (4.3 ns) and high output drive (Β±24 mA) ensure that clock edges remain sharp and synchronized across multiple destinations. The 3-state outputs allow the clock source to be disabled when not needed, reducing power consumption. The wide supply voltage range makes it compatible with various clock generator ICs. This application is common in FPGA-based designs and high-speed digital circuits where clock integrity is paramount.
Recommended
Industrial Control I/O Expansion
In industrial control systems, the SN74LVC244APWR expands the digital I/O capabilities of a PLC or microcontroller. It buffers signals from sensors and actuators, providing isolation and drive capability. The 3-state outputs allow multiple devices to share a common bus, simplifying wiring. The device operates over the full industrial temperature range (-40Β°C to 125Β°C), ensuring reliability in harsh environments. Its ESD protection and latch-up immunity make it robust for industrial applications where electrical noise and transients are common.
Recommended
Telecommunications Line Interface
The SN74LVC244APWR is used in telecommunications equipment to buffer data lines between line interface units and switching circuits. Its high-speed operation and 3-state outputs enable efficient data bus management. The wide supply voltage range supports both legacy 3.3-V and newer 1.8-V logic. The device's low power consumption is beneficial in power-sensitive telecom applications. Its robust ESD protection ensures reliability in environments with frequent cable connections and disconnections.
Recommended
Recommended Products Summary
Engineering reference data for SN74LVC244APWR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC244APWRG4 | SN74LVC244APW | SN74LV244APWR | 74LVC244APW-Q100 |
|---|---|---|---|---|---|
| Package | TSSOP-20 (PW) | TSSOP-20 (PW) | TSSOP-20 (PW) | TSSOP-20 (PW) | TSSOP-20 (PW) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors |
| Supply Voltage Range | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 1.65 V to 3.6 V | 2 V to 5.5 V | 1.65 V to 3.6 V |
| Propagation Delay (typ) | 4.3 ns at 3.3 V | 4.3 ns at 3.3 V | 4.3 ns at 3.3 V | 7.5 ns at 3.3 V | 4.3 ns at 3.3 V |
| Output Drive (at 3.3 V) | Β±24 mA | Β±24 mA | Β±24 mA | Β±12 mA | Β±24 mA |
| Operating Temperature Range | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C | -40Β°C to 125Β°C |
| Automotive Qualified | No | No | No | No | Yes (AEC-Q100) |
| ESD Protection (HBM) | 2000 V | 2000 V | 2000 V | 2000 V | 2000 V |
Key Differentiators
- Wide supply voltage range (1.65 V to 3.6 V) (vs SN74LV244APWR)
- Faster propagation delay (4.3 ns vs 7.5 ns) (vs SN74LV244APWR)
- Higher output drive (Β±24 mA vs Β±12 mA) (vs SN74LV244APWR)
Design Notes
Place a 0.1-Β΅F ceramic capacitor as close as possible to the VCC pin (pin 20) and a 10-Β΅F bulk capacitor nearby to decouple the supply. The SN74LVC244APWR operates from 1.65 V to 3.6 V, and proper decoupling ensures stable operation and reduces noise-induced glitches on the outputs.
For high-speed applications, keep traces between the buffer outputs and loads as short as possible to minimize parasitic capacitance and inductance. Use controlled impedance traces if driving long lines. The 3-state outputs can drive up to 24 mA, so ensure the PCB traces can handle this current without excessive voltage drop.
Do not leave the output-enable pins (1OE and 2OE) floating; tie them to a defined logic level to avoid unintended output states. Also, ensure that the input voltage does not exceed VCC + 0.5 V to prevent latch-up. The device supports partial-power-down (Ioff), but care should be taken to avoid back-driving the outputs when VCC is off.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified; use 74LVC244APW-Q100 for automotive.
