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NXP Semiconductors 74LV251PW,118
- Part No.:
- 74LV251PW,118
- Manufacturer:
- NXP Semiconductors
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LV251PW,118.pdf
- Description:
- IC MULTIPLEXER 1 X 8:1 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,073
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Product details
Overview
74LV251PW,118 from NXP Semiconductors (formerly Philips) is an 8-input CMOS multiplexer with true/complement 3-State outputs, operating from 1.0 V to 3.6 V supply, featuring 19 ns propagation delay (Sn→Y at VCC = 3.3 V), 3.5 pF input capacitance, and –40°C to +125°C industrial temperature range - used in digital signal routing for programmable logic and bus arbitration systems.
For engineers reviewing the 74LV251PW,118 datasheet, 74LV251PW,118 pinout, 74LV251PW,118 application, or 74LV251PW,118 equivalent, key selection criteria include low-voltage compatibility (1.0–3.6 V), dual active-high/active-low outputs, 3-State expansion capability, and pin/function compatibility with 74HC/HCT251 for legacy design migration.
Technical Context
The 74LV251PW,118 implements a Si-gate CMOS 8:1 multiplexer architecture with three binary select lines (S0–S2), eight data inputs (I0–I7), and independent true (Y) and complement (Y) outputs. All outputs enter high-impedance (Z) state when OE is HIGH, enabling cascaded multiplexer configurations without external gating.
It supports TTL-level inputs at VCC ≥ 2.7 V and guarantees VIH/VIL thresholds across 1.2 V–3.6 V operation. Propagation delays are characterized per input path: In→Y (14 ns typ), Sn→Y (19 ns typ), and 3-State enable/disable times (tPZH/tPLZ = 24 ns typ at VCC = 3.3 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0 V to 3.6 V - enables direct interface with 1.2 V, 1.8 V, 2.5 V, and 3.3 V logic domains |
| Propagation Delay (Sn→Y) | 19 ns typical at VCC = 3.3 V - determines maximum clock rate for synchronous multiplexing |
| Input Capacitance | 3.5 pF - minimizes loading on driving gates and preserves signal integrity in high-speed buses |
| Output Drive | ±6 mA at VCC = 3.0 V - sufficient to drive standard CMOS loads and small fanouts without buffers |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive and industrial control environments |
| Quiescent Current | 20 µA max at VCC = 3.6 V - supports ultra-low-power standby in battery-backed systems |
Pinout & Package
74LV251PW,118 is housed in a 16-pin TSSOP (Thin Shrink Small Outline Package), body width 4.4 mm, lead pitch 0.65 mm, JEDEC MO-153 compliant (SOT403-1). The package supports automated SMT assembly and provides thermal performance suitable for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 12–15 | I0–I7 | Eight parallel data inputs - selected one routed to Y/Y based on S0–S2 address |
| 5 | Y | True output - active HIGH when OE = LOW and corresponding Ix selected |
| 6 | Y | Complement output - inverted logic of Y, both outputs simultaneously enabled/disabled |
| 7 | OE | Active-LOW 3-State enable - HIGH forces Y/Y into high-impedance for bus sharing or expansion |
| 8 | GND | Ground reference - must be connected to system 0 V plane with low-inductance path |
| 9–11 | S0–S2 | Binary select inputs - encode 0–7 to choose I0–I7; synchronous with input transitions |
| 16 | VCC | Positive supply - decoupling capacitor (100 nF) required within 5 mm of pin for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Low-voltage operation (1.0–3.6 V) | Enables direct integration into mixed-supply systems without level shifters |
| True and complement outputs | Eliminates need for external inverters in differential signaling or parity generation |
| 3-State outputs with common OE | Allows wire-OR connection of multiple 74LV251PW,118 devices on shared data buses |
| Pin/function compatibility with 74HC/HCT251 | Supports drop-in replacement in existing 5 V designs when VCC ≤ 3.6 V and timing margins allow |
| TTL-input compatibility at VCC ≥ 2.7 V | Permits interfacing with legacy 5 V microcontrollers or FPGAs using pull-up resistors |
Applications
| Programmable Logic Data Routing | Industrial Bus Arbitration |
|---|---|
Use Scenario: Selecting one of eight sensor inputs in a PLC I/O module before ADC sampling. IC Role / Device Role / Timing Role: Digital signal selector routing analog front-end outputs to a shared SAR ADC channel. Use Value: Reduces component count vs. discrete gate-based solutions and maintains sub-20 ns path delay for real-time sampling. |
Use Scenario: Managing access to a shared RS-485 transceiver among eight field devices in a factory network. IC Role / Device Role / Timing Role: Bus master selector enabling only one device's TX line to drive the differential bus at a time. Use Value: Prevents bus contention without software coordination; 3-State isolation ensures clean signal transitions. |
| Digital Test Equipment Signal Switching | Legacy System Interface Adapter |
Use Scenario: Routing calibration signals from internal DACs to DUT pins in automated test equipment. IC Role / Device Role / Timing Role: Precision-controlled signal path selector with matched Y/Y propagation for timing-critical stimulus delivery. Use Value: Dual outputs support simultaneous monitoring of signal and its inverse, improving fault detection accuracy. |
Use Scenario: Adapting 3.3 V FPGA I/O to legacy 5 V peripheral interfaces in upgrade projects. IC Role / Device Role / Timing Role: Level-tolerant multiplexer bridging voltage domains while preserving timing integrity. Use Value: TTL-compatible inputs accept 5 V logic highs; 3.3 V outputs remain safe for downstream 3.3 V receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-input multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC251PW,118 | Lower ICC (10 µA typ), improved noise immunity, same pinout and AC specs | Better suited for battery-powered portable instruments requiring lower static power | Select when quiescent current < 15 µA is mandatory and VCC ≤ 3.3 V |
| SN74LV251APW | TI version with identical logic, slightly tighter VOH/VOL specs at 3.3 V, same TSSOP package | Preferred for TI-centric BOMs or where dual-sourcing from US distributors is required | Select when sourcing from TI-authorized channels or needing TI-specific qualification documentation |
Compared with 74LV251PW,118, the 74LVC251PW,118 reduces static power by ~50% but lacks guaranteed operation below 1.65 V, while SN74LV251APW offers identical functionality with minor parametric tightening and different lifecycle support - all require no PCB changes due to pin-to-pin compatibility.
Availability
74LV251PW,118 is available at Aetrix Electronics and suitable for industrial automation, programmable logic controllers, and digital test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LV251PW,118 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
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips Semiconductors in 2006, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LV251PW,118 belongs to NXP's legacy LV logic family, designed specifically for low-voltage interoperability between mixed-supply digital systems while maintaining backward compatibility with HC/HCT timing and pinouts.
FAQ
What is the minimum supply voltage for reliable operation of the 74LV251PW,118?
The 74LV251PW,118 is fully specified down to VCC = 1.2 V for DC characteristics and functions correctly at VCC = 1.0 V with input levels referenced to GND or VCC. At 1.0 V, propagation delays increase and output drive weakens, but logic functionality remains intact per the 1998 Philips specification.
Does the 74LV251PW,118 support 5 V tolerant inputs?
No - the 74LV251PW,118 does not support 5 V tolerant inputs. However, it accepts TTL-level inputs (≥ 2.0 V HIGH, ≤ 0.8 V LOW) when VCC is between 2.7 V and 3.6 V, enabling safe interface with 5 V outputs via current-limiting resistors or open-drain configurations.
Can both Y and Y outputs of the 74LV251PW,118 be used simultaneously in a design?
Yes - the 74LV251PW,118 delivers true (Y) and complement (Y) outputs simultaneously under the same select and enable conditions. Both outputs transition in parallel with matched propagation delay, making them suitable for differential latching or XOR-based parity checking without added gates.
Is the 74LV251PW,118 pin-compatible with the 74HC251N?
Yes - the 74LV251PW,118 is functionally and pin-compatible with the 74HC251 in DIP and SO packages, and retains identical pin mapping in TSSOP. However, due to differing VCC ranges and AC characteristics, timing validation is required when substituting into 5 V HC designs.
What is the maximum capacitive load the 74LV251PW,118 can drive on its Y and Y outputs?
The 74LV251PW,118 is characterized with CL = 50 pF for AC parameters and supports up to 50 pF per output under standard conditions. Driving >50 pF increases propagation delay and may cause overshoot/undershoot; for heavier loads, buffer stages or reduced edge rates are recommended.
74LV251PW,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Multiplexer
- Circuit:
- 1 x 8:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- 6mA, 6mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74LV251PW,118 FAQ
1.How can I place an order for 74LV251PW,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV251PW,118 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 74LV251PW,118 reliable?
The price and inventory of 74LV251PW,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV251PW,118 is usually 5 days.
3.What payment methods are accepted for 74LV251PW,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV251PW,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV251PW,118?
74LV251PW,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV251PW,118 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 74LV251PW,118?
For technical support, including 74LV251PW,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV251PW,118 requirements.
6.How does Aetrix verify that 74LV251PW,118 is sourced from the original manufacturer or authorized distributors?
All 74LV251PW,118 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 74LV251PW,118 meets industry standards.
7.What is the process for return or replacement of 74LV251PW,118?
All 74LV251PW,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV251PW,118, 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 74LV251PW,118 part is unused and in its original packaging.
Return procedure for 74LV251PW,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LV251PW,118 Tags
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SN74HC138DR
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TC7SB3157CFU,LF(CT
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74CBTLV3257PW,118
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74CBTLV3257GUX
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74HC154BQ,118
Nexperia USA Inc.
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P3S0200GMX
NXP USA Inc.
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SN74CB3Q3245PWR
Texas Instruments
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SN74CB3Q3257RGYR
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TCA9543APWR
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TCA9546APWR
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SN74HC138N
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