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Nexperia USA Inc. 74LV123PW,112
- Part No.:
- 74LV123PW,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Multivibrators
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LV123PW,112.pdf
- Description:
- IC MULTIVIBRATOR 14NS 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,090
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Product details
Overview
74LV123PW,112 from Nexperia is a dual retriggerable monostable multivibrator with independent reset inputs, operating across 1.0 V to 5.5 V supply. It generates programmable output pulses via external REXT/CEXT networks (e.g., 80 ns to >470 µs), supports retriggering on either edge-triggered input (nA/nB), and terminates pulses instantly via LOW-going nRD. Used in timing control for industrial PLC I/O modules, where precise pulse extension and asynchronous reset are required.
For engineers reviewing the 74LV123PW,112 datasheet, 74LV123PW,112 pinout, 74LV123PW,112 application, or 74LV123PW,112 equivalent, this device delivers deterministic pulse-width control in low-voltage embedded systems, supports TTL-level compatibility at 3.3 V, and enables robust timing in noise-prone environments via Schmitt-trigger inputs.
Technical Context
The 74LV123PW,112 implements two independent monostable circuits, each with separate negative-edge (nA) and positive-edge (nB) trigger inputs, direct reset (nRD), and complementary outputs (nQ/nQ). Pulse width is set externally by REXT and CEXT, with typical tW ranging from 80 ns (VCC = 5.5 V, REXT = 5 kΩ, CEXT = 0 pF) to 470 µs (VCC = 2.0 V, REXT = 10 kΩ, CEXT = 100 nF).
Retriggering extends the output pulse indefinitely-up to 100% duty factor-while nRD provides asynchronous termination with 14 ns propagation delay (VCC = 5.5 V). Schmitt-trigger action on nA/nB ensures immunity to slow-rising signals, and clamp diodes allow interfacing to voltages exceeding VCC using current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0 V to 5.5 V - Enables operation in battery-powered and mixed-voltage systems including 1.2 V, 1.8 V, 2.5 V, 3.3 V, and 5 V rails. |
| Propagation Delay (nRD → nQ) | 14 ns (typical, VCC = 5.5 V) - Ensures fast reset response critical for safety-critical timing aborts. |
| Pulse Width Range | 80 ns to >470 µs - Programmable over 4 orders of magnitude using standard R/C values (REXT = 2–1000 kΩ, CEXT = 0 pF to >10 nF). |
| Input Thresholds | VIL ≤ 0.3VCC, VIH ≥ 0.7VCC (VCC = 4.5–5.5 V); Schmitt-trigger hysteresis on nA/nB - Guarantees clean triggering despite noisy or slow edges. |
| Operating Temperature | −40 °C to +125 °C - Validated for under-hood automotive and industrial control environments. |
| ESD Protection | HBM >2000 V, CDM >1000 V - Robust handling during PCB assembly and field service without additional protection circuitry. |
Pinout & Package
TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm pitch, lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A | Negative-edge triggered input (Channel 1) | Starts or extends Channel 1 output pulse on HIGH-to-LOW transition; Schmitt-triggered for noise immunity. |
| 1B | Positive-edge triggered input (Channel 1) | Starts or extends Channel 1 output pulse on LOW-to-HIGH transition; Schmitt-triggered. |
| 1RD | Direct reset input (Channel 1) | Terminates Channel 1 output pulse asynchronously on LOW-going edge; also accepts positive-edge trigger. |
| 1Q / 1Q | Complementary active-HIGH / active-LOW outputs (Channel 1) | Simultaneous logic inversion enables direct drive of enable/disable logic or differential signaling paths. |
| 1CEXT / 1REXT/CEXT | External timing capacitor/resistor node (Channel 1) | Connects to external R-C network defining base pulse width; pin 14 (1CEXT) must be grounded externally per layout recommendation. |
| 2A / 2B / 2RD / 2Q / 2Q / 2CEXT / 2REXT/CEXT | Identical functions for Channel 2 | Independent second monostable channel with identical timing, trigger, and reset behavior - no crosstalk or shared resources. |
| VCC (Pin 16) | Power supply | Single-supply operation; decoupling capacitor required near pin for stable timing performance. |
| GND (Pin 8) | Ground reference | Common return for all channels; pins 6 (2CEXT) and 14 (1CEXT) must be externally tied to GND to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent monostables | Two fully isolated timing channels sharing only VCC/GND - eliminates inter-channel timing skew or dependency. |
| Retriggerable architecture | Enables indefinite pulse extension up to 100% duty cycle - essential for watchdog timeout stretching or variable-duration enable signals. |
| Asynchronous direct reset | nRD input forces immediate output termination regardless of ongoing timing cycle - critical for fault recovery in motor control or power sequencing. |
| Wide voltage operation (1.0–5.5 V) | Single part replaces multiple voltage-specific timers (e.g., 74HC123, 74LVC123), reducing BOM count and qualification effort. |
| Schmitt-trigger inputs | Input hysteresis >0.3 V at 3.3 V - tolerates slow-rising signals from microcontroller GPIOs or mechanical switch debouncing without external RC filters. |
Applications
| Industrial Motor Control | Automotive Body Controller |
|---|---|
Use Scenario: Generating adjustable gate-drive enable pulses for BLDC inverter half-bridges, synchronized with rotor position feedback. IC Role / Device Role / Timing Role: Monostable channel 1 sets minimum off-time; channel 2 provides programmable dead-time insertion between high-side and low-side FETs. Use Value: Prevents shoot-through by guaranteeing precise, voltage-scalable dead-time (80 ns–470 µs) independent of MCU clock jitter or software latency. |
Use Scenario: Debouncing door lock/unlock switch inputs and generating timed window-lift enable pulses in central body control modules. IC Role / Device Role / Timing Role: Each 74LV123PW,112 channel handles one switch input: nA triggers on press, nRD resets on release, nQ drives relay driver. Use Value: Eliminates firmware-based debounce routines, reduces MCU interrupt load, and ensures consistent 50 ms–2 s timing across temperature (-40 °C to +125 °C). |
| Medical Infusion Pump | Test Equipment Signal Generator |
Use Scenario: Controlling stepper motor phase timing and alarm buzzer duration in battery-operated portable infusion pumps. IC Role / Device Role / Timing Role: Channel 1 generates fixed 100 ms step pulse; channel 2 produces 2 s audible alert pulse triggered by pressure sensor fault. Use Value: Maintains accurate timing down to 1.2 V supply (low-battery condition), avoiding software timer drift or brown-out resets. |
Use Scenario: Creating calibrated delay lines and variable-width strobes for digital pattern generators and boundary-scan test fixtures. IC Role / Device Role / Timing Role: Dual channels generate master clock enable and data-valid windows; retriggering synchronizes to incoming trigger events. Use Value: Achieves sub-50 ns timing resolution at 5.5 V while supporting long-duration pulses (>100 µs) for analog subsystem calibration sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC123APW,118 | Lower ICC (max 10 μA vs. 160 μA), narrower VCC range (1.65–3.6 V), no 1.0–1.2 V operation | Optimized for ultra-low-power 3.3 V systems; unsuitable for 1.2 V or 5 V rails | Select when supply is strictly 1.8 V/3.3 V and static current <10 μA is mandatory. |
| SN74LV123AD | SO16 package (SOT109-1), same electrical specs but 1.27 mm pitch; higher thermal resistance (12.4 mW/K derating above 110 °C) | Better suited for through-hole prototyping or legacy SOIC footprints; less space-efficient than TSSOP | Select for manual soldering, wave-solder compatibility, or board-level interchangeability with existing SO16 layouts. |
Compared with 74LVC123APW,118, the 74LV123PW,112 offers wider voltage flexibility (1.0–5.5 V) and guaranteed operation at 1.2 V, while SN74LV123AD trades compactness for easier hand-soldering and thermal margin in high-ambient environments.
Availability
74LV123PW,112 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, medical infusion devices, and automated test equipment requiring stable component supply across extended temperature ranges.
Supply support for 74LV123PW,112 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
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.
The 74LV123 belongs to Nexperia's LV (Low-Voltage) logic family, designed specifically for robust timing and signal conditioning in battery-powered, automotive, and industrial systems operating from 1.0 V to 5.5 V.
FAQ
What is the minimum supply voltage at which the 74LV123PW,112 guarantees functional operation?
The 74LV123PW,112 is guaranteed to function down to VCC = 1.0 V, with input levels referenced to GND or VCC. Static characteristics (VIH/VIL, VOH/VOL) are specified from VCC = 1.2 V, and dynamic timing (propagation delay, pulse width) is characterized from VCC = 1.2 V to 5.5 V across −40 °C to +125 °C.
Can pin 14 (1CEXT) and pin 6 (2CEXT) be left floating?
No - the datasheet explicitly recommends grounding both 1CEXT (pin 14) and 2CEXT (pin 6) externally to GND (pin 8) to minimize noise coupling into the timing network. Leaving them floating risks timing instability, increased jitter, and susceptibility to EMI, especially with large CEXT values.
How does retriggering affect the output pulse width calculation?
Retriggering resets the internal timing capacitor discharge cycle, extending the output pulse by the full programmed tW value from the new trigger edge. The total pulse width becomes the sum of individual tW intervals if retriggered before expiration - enabling arbitrarily long pulses without software intervention or external counters.
Is the 74LV123PW,112 compatible with 5 V TTL logic inputs?
Yes - when VCC is between 2.7 V and 3.6 V, the 74LV123PW,112 accepts standard TTL input levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V). At VCC = 5.5 V, VIH ≥ 3.85 V and VIL ≤ 1.65 V, making it compatible with 5 V CMOS but not legacy 5 V TTL without level-shifting.
74LV123PW,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LV
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Logic Type:
- Monostable
- Independent Circuits:
- 2
- Schmitt Trigger Input:
- No
- Propagation Delay:
- 14 ns
- Current - Output High, Low:
- 12mA, 12mA
- Voltage - Supply:
- 1 V ~ 5.5 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
74LV123PW,112 FAQ
1.How can I place an order for 74LV123PW,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV123PW,112 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 74LV123PW,112 reliable?
The price and inventory of 74LV123PW,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV123PW,112 is usually 5 days.
3.What payment methods are accepted for 74LV123PW,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV123PW,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV123PW,112?
74LV123PW,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV123PW,112 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 74LV123PW,112?
For technical support, including 74LV123PW,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV123PW,112 requirements.
6.How does Aetrix verify that 74LV123PW,112 is sourced from the original manufacturer or authorized distributors?
All 74LV123PW,112 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 74LV123PW,112 meets industry standards.
7.What is the process for return or replacement of 74LV123PW,112?
All 74LV123PW,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV123PW,112, 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 74LV123PW,112 part is unused and in its original packaging.
Return procedure for 74LV123PW,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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