Nexperia USA Inc. 74LV123PW-Q100J

Overview

74LV123PW-Q100 from Nexperia is a dual retriggerable monostable multivibrator with independent reset inputs, designed for precise pulse generation and timing extension in automotive control systems. It operates across 1.0 V–5.5 V supply, supports -40 °C to +125 °C ambient, features Schmitt-trigger inputs on A/B pins, and delivers programmable output pulse widths via external REXT/CEXT networks - used in engine control unit (ECU) watchdog supervision and transmission shift timing.

For engineers reviewing the 74LV123PW-Q100 datasheet, 74LV123PW-Q100 pinout, 74LV123PW-Q100 application, or 74LV123PW-Q100 equivalent, this device offers automotive-grade retriggerable timing with direct reset termination, TTL-compatible input thresholds at 3.3 V, low ground bounce (<0.8 V), and AEC-Q100 Grade 1 qualification - critical for functional safety-critical timing functions requiring deterministic pulse extension and interruption.

Technical Context

The 74LV123PW-Q100 implements two independent monostable circuits, 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 values, with typical tW ranging from 70 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 while nRD remains HIGH; a LOW-going edge on nRD terminates the pulse immediately. Schmitt-trigger action on nA/nB enables robust operation with slow-rising signals, and internal clamp diodes allow current-limiting resistor interfacing to voltages exceeding VCC - essential for mixed-voltage automotive subsystems.

Key Specifications

Pinout & Package

TSSOP16 package (SOT403-1): plastic thin shrink small outline, 16 leads, 4.4 mm body width, 0.65 mm lead pitch, exposed pad not electrically connected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar retriggerable monostable multivibrator applications.

Compared with SN74LV123APWR and MC74LVX123DR2G, the 74LV123PW-Q100 uniquely combines AEC-Q100 Grade 1 qualification, -40 °C to +125 °C operation, and 14 ns reset delay - making it the only option qualified for powertrain and ADAS timing-critical fail-safe functions without derating or additional validation.

Availability

74LV123PW-Q100 is available at Aetrix Electronics and suitable for automotive engine control units, transmission control modules, and advanced driver assistance systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LV123PW-Q100 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 high-volume, high-reliability logic, discrete, and MOSFET solutions, with leadership in automotive-grade standard products.

The 74LV123PW-Q100 belongs to Nexperia's automotive-qualified LV logic family, engineered specifically for robust timing functions in harsh-temperature automotive environments where deterministic pulse generation and fail-safe reset response are mandatory.

FAQ

What is the minimum external capacitor value supported for stable pulse width programming?

The datasheet specifies no lower limit for CEXT; however, stable operation is confirmed down to 0 pF (with REXT = 5 kΩ yielding 70 ns pulse width at VCC = 5.5 V). For sub-100 ns timing, CEXT = 0 pF is recommended, and pin 14 (1CEXT) and pin 6 (2CEXT) must be externally grounded to GND (pin 8) to minimize parasitic capacitance and ensure consistent propagation delay.

Can the 74LV123PW-Q100 operate reliably at 1.2 V supply while maintaining AEC-Q100 compliance?

Yes - the device is fully specified and AEC-Q100 qualified at VCC = 1.2 V across -40 °C to +125 °C. At this voltage, VIH is guaranteed ≥0.9 V and VIL ≤0.3 V, and propagation delay remains within 120 ns (max) for nA/nB→nQ. Static current draw is ≤20 µA, supporting ultra-low-power always-on automotive subsystems.

How does the retrigger time (trtrig) depend on external component values?

For CEXT > 10 pF, trtrig follows VCC-dependent formulas: at VCC = 5.0 V, trtrig = 30 + 0.19×REXT×CEXT⁰·⁹ + 13×REXT¹·⁰⁵ (ns); at VCC = 3.0 V, trtrig = 41 + 0.15×REXT×CEXT⁰·⁹ (ns). This ensures reliable retriggering only when successive trigger edges exceed this minimum interval - preventing false extensions due to noise or ringing.

Is the TSSOP16 package (SOT403-1) lead-free and RoHS-compliant?

Yes - the 74LV123PW-Q100 in TSSOP16 packaging is manufactured using lead-free solderable terminations and complies with EU RoHS Directive 2011/65/EU and REACH SVHC regulations. The package uses matte tin plating over copper leadframe and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) for unlimited floor life at ≤30 °C/85 % RH.