SN74LS257BN Texas Instruments logic-ics (PDIP-16) In Stock
SN74LS257BN is a quad 2-to-1 multiplexer with 3-state outputs in 16-pin DIP, 5V TTL operation, 0-70C range. In stock from $0.58/unit, 1pc MOQ, worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- PDIP-16
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- SN74LS257BN Datasheet PDF
- Category
- logic-ics
- Price
- From $0.5843(MOQ 29)
- Temp Range
- 0.0°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Applications
SN74LS257BN is widely used in data routing, bus multiplexing, and address selection circuits in embedded systems and logic boards. Its 3-state outputs make it ideal for shared data bus architectures in microprocessor systems and FPGA prototyping.
Specifications
| supply_voltage | 5V |
| logic_family | TTL/LS |
| output_type | 3-State |
| number_of_channels | 4 |
| propagation_delay | 18ns |
| operating_temperature | 0 to 70C |
| Package | PDIP-16 |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74LS257BN:
Frequently Asked Questions
What is the SN74LS257BN used for?
The SN74LS257BN is a quad 2-to-1 multiplexer with 3-state outputs. It selects between two 4-bit data buses and drives the output onto a shared bus. The 3-state outputs allow multiple devices to share the same data lines without conflict, making it ideal for microprocessor address/data bus routing.
What package and pin count does the SN74LS257BN use?
The SN74LS257BN comes in a 16-pin PDIP through-hole package. The B suffix indicates it meets standard TTL/LS specifications, and N denotes the PDIP package. It operates from a single 5V supply and is compatible with standard 74LS-series logic.
What is the operating temperature range of the SN74LS257BN?
The SN74LS257BN has a commercial operating temperature range of 0C to 70C. For extended industrial temperature range (-40C to 85C), consider the SN74LS257B military/industrial variants or equivalent parts from other manufacturers.
What are the best alternatives to the SN74LS257BN?
Compatible alternatives to the SN74LS257BN include the 74HCT257 (CMOS, pin-compatible, lower power), SN74ALS257B (Advanced Low-Power Schottky, faster switching), and SN74HC257 (CMOS version for 2-6V operation). For surface-mount designs, consider the SN74LS257BD (SOIC package).
How do I enable or disable the SN74LS257BN outputs?
The SN74LS257BN has an active-low Output Enable pin. When OE is LOW, the selected data is driven onto the outputs. When OE is HIGH, all outputs enter high-impedance 3-state mode, releasing the bus. The SELECT input pin 1 chooses between the two 4-bit input buses A or B.
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Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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