SN74LV240A - Octal Inverting Buffer/Driver 3-State | TI
MPN: SN74LV240A β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.45 | $0.45 |
| 10 | $0.38 | $3.80 |
| 100 | $0.29 | $29.00 |
| 500 | $0.24 | $120.00 |
| 1,000 | $0.19 | $190.00 |
Drop-in alternatives for SN74LV240A 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:
SN74LVC240A
β Drop-Inβ In Stock
$0.19 / Unit
View Datasheet βSN74AHCT240A
β Drop-Inπ Reference alternative (not in catalog)
SN74HCT240A
β Drop-Inπ Reference alternative (not in catalog)
74LVT240A
β Drop-Inπ Reference alternative (not in catalog)
MC74LVX240
β Drop-Inπ Reference alternative (not in catalog)
SN74LV240A Maximum Ratings & Electrical Characteristics
| Technology Family | LV-A |
| Supply Voltage (VCC) | 2 V to 5.5 V |
| Output Drive Current | 8 mA at 3.3 V |
| Number of Channels | 8 |
| Output Type | 3-State |
| Logic Function | Inverting Buffer/Driver |
| Input Type | CMOS |
| Output Type | 3-State |
| Propagation Delay Time | [DATA_NEEDED: Propagation delay time] |
| Maximum Operating Frequency | [DATA_NEEDED: Maximum operating frequency] |
| Operating Temperature Range | -40Β°C to 85Β°C |
| Package Type | SOIC-20, SSOP-20, TSSOP-20 |
| Mounting Type | Surface Mount |
| Latch-Up Performance | Exceeds 250 mA per JESD 17 |
| ESD Protection | [DATA_NEEDED: ESD protection level] |
| RoHS Status | Compliant |
SN74LV240A Pin Configuration
| Pin 1 | 1A0 β Input for channel 0 |
| Pin 2 | 1Y0 β Inverted output for channel 0 |
| Pin 3 | 1A1 β Input for channel 1 |
| Pin 4 | 1Y1 β Inverted output for channel 1 |
| Pin 5 | 1A2 β Input for channel 2 |
| Pin 6 | 1Y2 β Inverted output for channel 2 |
| Pin 7 | 1A3 β Input for channel 3 |
| Pin 8 | 1Y3 β Inverted output for channel 3 |
| Pin 9 | GND β Ground |
| Pin 10 | 2A3 β Input for channel 7 |
| Pin 11 | 2Y3 β Inverted output for channel 7 |
| Pin 12 | 2A2 β Input for channel 6 |
| Pin 13 | 2Y2 β Inverted output for channel 6 |
| Pin 14 | 2A1 β Input for channel 5 |
| Pin 15 | 2Y1 β Inverted output for channel 5 |
| Pin 16 | 2A0 β Input for channel 4 |
| Pin 17 | 2Y0 β Inverted output for channel 4 |
| Pin 18 | 1OE β Output enable for channels 0-3 (active low) |
| Pin 19 | 2OE β Output enable for channels 4-7 (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
SN74LV240A is suitable for 6 applications: Memory Address Drivers, Clock Drivers, Bus-Oriented Receivers/Transmitters, General-Purpose Digital Interfacing, Low-Noise Signal Distribution, Test and Measurement Equipment.
Memory Address Drivers
The SN74LV240A is designed to improve performance and density of 3-state memory address drivers. Its 8 mA drive at 3.3 V ensures reliable driving of address lines in memory systems, while the 3-state outputs allow multiple memory banks to share the same bus. The low-drive CMOS design minimizes noise, which is critical for high-speed memory interfaces. The wide voltage range (2 V to 5.5 V) supports both 3.3-V and 5-V memory systems, making it a versatile choice for various memory architectures.
Recommended
Clock Drivers
The SN74LV240A can be used as a clock driver to buffer and distribute clock signals to multiple loads. Its 8 mA drive capability at 3.3 V ensures strong signal integrity, while the inverting outputs can be used to generate complementary clock signals. The 3-state outputs allow the clock line to be disabled when not needed, reducing power consumption. The low noise characteristics are beneficial for maintaining clock signal quality in sensitive applications.
Recommended
Bus-Oriented Receivers/Transmitters
The SN74LV240A is designed for bus-oriented receivers and transmitters, providing buffering and inversion for data buses. Its 3-state outputs enable multiple devices to share the same bus without contention, while the 8 mA drive ensures reliable signal transmission. The wide voltage range supports mixed-voltage bus systems, and the low-drive CMOS design reduces noise and power consumption. This makes it suitable for industrial control buses and data acquisition systems.
Recommended
General-Purpose Digital Interfacing
The SN74LV240A can be used for general-purpose digital interfacing between different logic families or voltage domains. Its 2 V to 5.5 V operating range allows it to interface 3.3-V and 5-V logic, while the inverting outputs provide signal inversion when needed. The 3-state outputs enable bus sharing in multi-device systems. The low-drive CMOS design is suitable for low-noise applications where signal integrity is important.
Recommended
Low-Noise Signal Distribution
The SN74LV240A is ideal for low-noise signal distribution due to its low-drive CMOS design, which minimizes output ground bounce and noise. It can be used to distribute signals to multiple loads without degrading signal quality. The 8 mA drive at 3.3 V is sufficient for driving short traces and multiple inputs. The 3-state outputs allow the signal line to be isolated when not in use, reducing noise coupling.
Recommended
Test and Measurement Equipment
The SN74LV240A is used in test and measurement equipment for signal buffering and driving. Its wide voltage range and 3-state outputs make it suitable for interfacing with various test instruments. The low noise characteristics ensure accurate signal measurement, while the 8 mA drive can drive long cables and multiple loads. The device's robustness, including latch-up performance exceeding 250 mA per JESD 17, ensures reliable operation in demanding test environments.
Recommended
Recommended Products Summary
Engineering reference data for SN74LV240A β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SN74LVC240A | SN74AHCT240A | SN74HCT240A | 74LVT240A | MC74LVX240 |
|---|---|---|---|---|---|---|
| Package | SOIC-20, SSOP-20, TSSOP-20 | SOIC-20, SSOP-20, TSSOP-20 | SOIC-20, TSSOP-20 | SOIC-20, TSSOP-20 | SOIC-20, TSSOP-20 | SOIC-20, TSSOP-20 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | NXP Semiconductors | onsemi |
| Supply Voltage Range | 2 V to 5.5 V | 1.65 V to 3.6 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 2.7 V to 3.6 V | 2 V to 3.6 V |
| Output Drive Current | 8 mA at 3.3 V | 24 mA at 3.3 V | 8 mA at 5 V | 6 mA at 5 V | 32 mA at 3.3 V | 4 mA at 3.3 V |
| Logic Function | Inverting Buffer/Driver | Inverting Buffer/Driver | Inverting Buffer/Driver | Inverting Buffer/Driver | Inverting Buffer/Driver | Inverting Buffer/Driver |
| 3-State Outputs | Yes | Yes | Yes | Yes | Yes | Yes |
| Latch-Up Performance | Exceeds 250 mA per JESD 17 | Exceeds 250 mA per JESD 17 | Exceeds 250 mA per JESD 17 | Exceeds 250 mA per JESD 17 | [DATA_NEEDED] | [DATA_NEEDED] |
| Operating Temperature Range | -40Β°C to 85Β°C | -40Β°C to 85Β°C | -40Β°C to 85Β°C | -40Β°C to 85Β°C | -40Β°C to 85Β°C | -40Β°C to 85Β°C |
Key Differentiators
- Low-drive CMOS design for low noise (vs SN74LVC240A)
- Wide operating voltage range (vs 74LVT240A)
- Latch-up performance exceeds 250 mA per JESD 17 (vs MC74LVX240)
Design Notes
Place a 0.1 Β΅F ceramic capacitor close to the VCC pin and a 10 Β΅F bulk capacitor on the power supply rail to ensure stable operation. The SN74LV240A operates from 2 V to 5.5 V, so ensure the supply voltage is within this range. Decoupling is critical to minimize noise and prevent false triggering of the 3-state outputs.
Keep traces between the SN74LV240A and bus lines as short as possible to minimize signal degradation. Use controlled impedance traces for high-speed signals. The 3-state outputs can drive multiple loads, but ensure the total capacitance on the bus does not exceed the device's drive capability. Add series resistors if needed to reduce ringing.
Do not leave the output enable (OE) pins floating. Tie 1OE and 2OE to a defined logic level to avoid bus contention. When the outputs are disabled (high-impedance), ensure the bus is pulled to a known state with pull-up or pull-down resistors. Also, avoid exceeding the absolute maximum ratings for VCC and input voltages to prevent damage.
Compliance Information
RoHS compliant per TI product page. Not AEC-Q100 qualified. Lead-free per TI's green packaging.
