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Nexperia USA Inc. 74LV123DB,112
- Part No.:
- 74LV123DB,112
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Multivibrators
- Package:
- 16-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LV123DB,112.pdf
- Description:
- IC MULTIVIBRATOR 14NS 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,348
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Product details
Overview
74LV123DB,112 from Nexperia is a dual retriggerable monostable multivibrator with independent reset inputs, designed for precise pulse generation and timing extension in low-voltage digital systems. It operates from 1.0 V to 5.5 V, supports TTL-level inputs at VCC ≥ 2.7 V, features Schmitt-trigger inputs on A/B pins, and delivers programmable output pulse widths via external REXT/CEXT networks - used in industrial control sequencers, power-on delay circuits, and debounce interfaces.
For engineers reviewing the 74LV123DB,112 datasheet, 74LV123DB,112 pinout, 74LV123DB,112 application, or 74LV123DB,112 equivalent, key selection criteria include its dual-channel retriggerability, 16-pin SO16 package compatibility, -40 °C to +125 °C operation, and direct reset termination capability across both channels.
Technical Context
The 74LV123DB,112 implements two independent monostable multivibrators, each with separate negative-edge (nA) and positive-edge (nB) trigger inputs, active-low direct reset (nRD), and complementary outputs (nQ/nQ). Pulse width is externally set by REXT and CEXT on each channel, with retriggering enabled during the active output period to extend duration indefinitely - supporting up to 100 % duty factor.
Schmitt-trigger action on nA/nB inputs ensures robust noise immunity against slow-rising signals; clamp diodes on all inputs allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors. The device complies with JEDEC standards JESD8-7, JESD8-5, JESD8C, and JESD36 across its full supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.0 V to 5.5 V - enables operation in ultra-low-power (1.2 V) and standard 3.3 V/5 V systems without level translation. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive and industrial environments requiring extended thermal stability. |
| Propagation Delay (nA/nB → nQ) | 25 ns typical at VCC = 3.3 V - ensures fast response in real-time timing applications such as signal synchronization. |
| Pulse Width Range | 70 ns to >470 µs - selectable via external REXT (2–1000 kΩ) and CEXT (no upper limit), supporting microsecond to millisecond timing. |
| Input Thresholds | VIL ≤ 0.8 V, VIH ≥ 2.0 V at VCC = 3.3 V - guarantees reliable TTL-compatible triggering without additional logic buffers. |
| Output Drive Strength | ±6 mA at VCC = 3.0 V - sufficient to drive multiple CMOS loads or small LEDs directly in indicator circuits. |
| Power Dissipation | 500 mW max at Tamb ≤ 110 °C (SO16) - supports continuous operation in compact PCB layouts with moderate thermal management. |
Pinout & Package
74LV123DB,112 is supplied in the SOT109-1 plastic small outline package (SO16), 16-lead, 3.9 mm body width, with gull-wing leads and pin 1 index marker. Pin pitch is 1.27 mm; package meets JEDEC MS-012 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1A, 2A | Negative-edge triggered input | Each initiates or extends output pulse on falling edge; tolerant of slow edges due to Schmitt action. |
| 1B, 2B | Positive-edge triggered input | Each initiates or extends output pulse on rising edge; same Schmitt-trigger robustness as A inputs. |
| 1RD, 2RD | Direct reset input | Active-low asynchronous termination of ongoing pulse; also accepts positive-edge trigger for alternate mode. |
| 1Q, 2Q | Active-HIGH output | Complementary to inverted outputs; drives HIGH during monostable timeout period. |
| 1Q, 2Q | Active-LOW output | Inverted output pair; provides simultaneous HIGH/LOW logic states for differential interface or latch enable. |
| 1CEXT, 2CEXT | External capacitor connection | Connects timing capacitor to ground; recommended to tie externally to GND (pin 8) for noise reduction. |
| 1REXT/CEXT, 2REXT/CEXT | Resistor-capacitor timing node | Joint connection point for REXT and CEXT; sets base pulse width per channel using tW ≈ K × REXT × CEXT. |
| VCC (pin 16), GND (pin 8) | Power supply terminals | Single-supply operation; decoupling capacitor required near VCC pin for stable timing performance. |
Key Features
| Feature | Design Value |
|---|---|
| Retriggerable monostable operation | Enables indefinite pulse extension via repeated edge triggers - critical for variable-duration timing in motor control or watchdog supervision. |
| Independent dual-channel architecture | Two fully isolated monostables share only VCC/GND; eliminates crosstalk and allows asymmetric timing configurations per channel. |
| Schmitt-trigger inputs on A/B pins | Provides hysteresis (≈0.3 V at VCC = 3.3 V), rejecting noise on slow-rising sensor or switch signals without external RC filtering. |
| Clamp diode protected inputs | Allows safe interface to voltages > VCC (e.g., 5 V signals into 3.3 V system) using series current-limiting resistors. |
| Wide temperature qualification | Specified from -40 °C to +125 °C - validated for use in automotive engine control units and industrial PLC I/O modules. |
Applications
| Industrial Sequencing | Power Management |
|---|---|
Use Scenario: Generating timed enable pulses for sequential activation of relay banks in factory automation panels. IC Role / Device Role / Timing Role: Dual monostable acts as programmable delay generator - one channel controls main power-up sequence, second manages auxiliary subsystem timing. Use Value: Eliminates need for discrete RC timers or microcontroller-based delays, reducing BOM count and firmware complexity while maintaining deterministic timing. | Use Scenario: Implementing controlled power-on reset delay and brown-out recovery hold-off in embedded power supplies. IC Role / Device Role / Timing Role: Monostable generates fixed-duration assertion of /RESET line after VCC stabilizes; reset input terminates pulse early if voltage drops below threshold. Use Value: Ensures clean system initialization without external supervisor ICs; direct reset capability enables dynamic timeout adjustment during fault conditions. |
| Signal Debouncing | Interface Glitch Suppression |
Use Scenario: Debouncing mechanical pushbuttons and rotary encoders in human-machine interface (HMI) panels. IC Role / Device Role / Timing Role: Each monostable filters contact bounce by generating a clean, fixed-width output pulse after first valid edge - ignoring subsequent bounces within window. Use Value: Provides hardware-level debouncing with sub-microsecond jitter control, superior to software polling or RC+Schmitt solutions in high-reliability applications. | Use Scenario: Suppressing transient glitches on communication bus control lines (e.g., /CS, /WR) caused by EMI or hot-plug events. IC Role / Device Role / Timing Role: Monostable stretches valid control signal duration past noise window; retriggering accommodates bursty interference without false deassertion. Use Value: Prevents spurious memory writes or peripheral misconfiguration in noisy industrial environments - no firmware intervention required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar monostable multivibrator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC123A,118 | Same pinout and function but specified only to +85 °C; lower ICC (160 μA vs. 500 μA max); lacks JESD8-7 compliance below 1.2 V. | Suitable for commercial-grade consumer electronics where extended temperature range is unnecessary. | Select when cost sensitivity outweighs industrial temperature requirements and ultra-low VCC operation is not needed. |
| SN74LV123AD | Texas Instruments variant; identical electrical specs but different thermal derating curve (11.2 mW/K above 106 °C vs. Nexperia's 12.4 mW/K above 110 °C). | Compatible in board layout and timing behavior; TI's version shows marginally better thermal performance at extreme ambient temperatures. | Prefer for designs already standardized on TI logic families or requiring tighter thermal margin above 110 °C. |
Compared with 74LVC123A,118 and SN74LV123AD, the 74LV123DB,112 uniquely combines -40 °C to +125 °C operation, JESD8-7 compliance down to 1.0 V, and SO16 packaging optimized for legacy industrial PCB footprints - making it the only choice for high-reliability, wide-VCC, extended-temperature monostable timing.
Availability
74LV123DB,112 is available at Aetrix Electronics and suitable for industrial sequencing, power management, signal debouncing, and interface glitch suppression requiring stable component supply across extended temperature ranges and mixed-voltage system integration.
Supply support for 74LV123DB,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 focused on essential efficiency technologies, delivering high-performance logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LV logic family targets low-voltage, high-noise-immunity digital interfacing and timing applications - engineered for robust operation from 1.0 V to 5.5 V with industry-leading ESD protection and thermal resilience.
FAQ
What is the minimum external capacitor value required for stable operation?
The 74LV123DB,112 does not specify a minimum CEXT value. For optimal noise immunity and predictable timing, Nexperia recommends grounding pins 14 (1CEXT) and 6 (2CEXT) directly to GND (pin 8). When CEXT exceeds 10 nF, the pulse width formula tW ≈ K × REXT × CEXT applies with K = 0.48 at VCC = 2.0 V and 0.45 at VCC = 5.0 V.
Can both monostable channels be triggered simultaneously without interference?
Yes - the two monostable sections are electrically isolated except for shared VCC and GND. Simultaneous triggering of 1A/1B and 2A/2B produces independent output pulses with no crosstalk or timing skew. Propagation delays are matched within ±5 ns across channels at VCC = 3.3 V, enabling synchronized dual-pulse generation.
How does the reset input behave during power-up?
At power-up, the 74LV123DB,112 may generate an unintended output pulse due to internal state uncertainty. To prevent this, Nexperia recommends applying a pull-down RC network to nRD (e.g., 10 kΩ + 100 nF to GND), ensuring nRD remains LOW until VCC stabilizes - thereby holding both outputs inactive until deliberate triggering occurs.
Is the SO16 package RoHS-compliant and lead-free?
Yes - the SOT109-1 (SO16) package used for 74LV123DB,112 is fully RoHS-compliant and lead-free, meeting EU Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity level (MSL-3). The device is rated for reflow soldering per IPC/JEDEC J-STD-020D.3, with peak temperature tolerance up to 260 °C.
74LV123DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LV
- Package/Case:
- 16-SSOP (0.209", 5.30mm 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-SSOP
74LV123DB,112 FAQ
1.How can I place an order for 74LV123DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LV123DB,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 74LV123DB,112 reliable?
The price and inventory of 74LV123DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LV123DB,112 is usually 5 days.
3.What payment methods are accepted for 74LV123DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LV123DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LV123DB,112?
74LV123DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LV123DB,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 74LV123DB,112?
For technical support, including 74LV123DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LV123DB,112 requirements.
6.How does Aetrix verify that 74LV123DB,112 is sourced from the original manufacturer or authorized distributors?
All 74LV123DB,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 74LV123DB,112 meets industry standards.
7.What is the process for return or replacement of 74LV123DB,112?
All 74LV123DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LV123DB,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 74LV123DB,112 part is unused and in its original packaging.
Return procedure for 74LV123DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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