NXP Semiconductors 74LV393DB,112

Overview

74LV393DB,112 from Nexperia is a dual 4-bit binary ripple counter IC with two independent asynchronous master reset inputs (1MR, 2MR), two edge-triggered clock inputs (1CP, 2CP), and eight buffered outputs (1Q0–1Q3, 2Q0–2Q3). It operates from 1.0 V to 3.6 V, advances on HIGH-to-LOW clock transitions, and clears all flip-flops to LOW when MR is HIGH. It is used in digital timing, frequency division, and event counting circuits requiring low-voltage, rail-to-rail-compatible logic.

For engineers reviewing the 74LV393DB,112 datasheet, 74LV393DB,112 pinout, 74LV393DB,112 application, or 74LV393DB,112 equivalent, this page delivers verified functional roles, SO14 package mapping, propagation delay specs at 3.3 V (tpd = 14 ns), static VIH/VIL thresholds, and real-world use cases in industrial control and instrumentation.

Technical Context

The 74LV393DB,112 implements two independent 4-stage ripple counters using T-type flip-flops cascaded in series, where each stage toggles on the falling edge of its preceding stage's output - resulting in inherent propagation delay accumulation across Q0→Q1→Q2→Q3. Clock input sensitivity is defined by Δt/ΔV ≤ 100 ns/V at VCC = 3.3 V, ensuring robust operation under fast-rising/falling edges.

Its asynchronous master reset (nMR) overrides all internal states regardless of clock phase, forcing all four outputs LOW within tPHL ≤ 26 ns at VCC = 3.6 V. Input clamp diodes allow safe interfacing to voltages exceeding VCC when current-limiting resistors are used - a key feature for mixed-voltage system integration.

Key Specifications

Pinout & Package

74LV393DB,112 is packaged in SO14 (SOT108-1), a plastic small outline package with 14 leads and 3.9 mm body width. Pin 1 is marked by a notch or dot; pin numbering follows standard counter-clockwise layout from top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual binary counter applications.

Compared with SN74LV393AIPWRE4, the 74LV393DB,112 offers superior thermal headroom in SO14 for sustained operation at +125 °C, while 74HC393N,652 trades low-voltage flexibility for broader supply compatibility - making the LV variant optimal for modern ultra-low-power industrial controllers.

Availability

74LV393DB,112 is available at Aetrix Electronics and suitable for industrial timer modules, serial data rate dividers, motor phase encoder counters, and power supply sequencing monitors requiring stable component supply across extended temperature ranges.

Supply support for 74LV393DB,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 high-volume, high-reliability logic, discrete, and MOSFET solutions for automotive, industrial, and consumer markets.

The 74LV logic family targets low-voltage, high-noise-immunity digital interfacing in battery-powered and mixed-signal systems - designed specifically for robust operation between 1.0 V and 3.6 V with minimal power consumption.

FAQ

What is the maximum clock frequency supported by 74LV393DB,112 at 3.3 V?

The 74LV393DB,112 achieves a maximum clock frequency of 90 MHz at VCC = 3.3 V with CL = 15 pF load, as specified in Table 7 of the Rev. 7 datasheet. This value reflects the fastest reliable toggle rate for the first stage (nCP → nQ0); cascaded stages exhibit cumulative propagation delay, limiting overall counter throughput.

Can 74LV393DB,112 operate with a 1.2 V supply?

Yes - the 74LV393DB,112 is fully specified down to 1.0 V supply, with guaranteed operation at 1.2 V across −40 °C to +125 °C. At this voltage, typical propagation delay increases to 75 ns (nCP → nQ0), and VIH/VIL thresholds scale proportionally to maintain noise margin.

How does the asynchronous master reset behave during clock activity?

The 1MR and 2MR inputs override all internal flip-flop states immediately and independently, forcing corresponding Q0–Q3 outputs LOW regardless of clock phase, frequency, or current count value. Reset assertion takes effect within tPHL ≤ 26 ns at VCC = 3.6 V, with no metastability or race condition risk.

Is 74LV393DB,112 pin-compatible with older 74LS393 or 74HC393 packages?

No - while the logical function and pin assignments (SO14) match industry-standard 393 counters, the 74LV393DB,112 uses LV-specific electrical characteristics: lower VCC range (1.0–3.6 V), different VIH/VIL thresholds, and optimized drive strength. Direct substitution requires validation of voltage translation and timing margins in the target circuit.