Nexperia USA Inc. 74LV393PW-Q100J

Overview

74LV393PW-Q100 from Nexperia is a dual 4-bit binary ripple counter IC designed for automotive timing and frequency division functions. It features two independent asynchronous master reset inputs (1MR, 2MR), two edge-triggered clock inputs (1CP, 2CP) responding to HIGH-to-LOW transitions, and eight buffered outputs (1Q0–1Q3, 2Q0–2Q3). Operates across 1.0 V to 3.6 V supply with AEC-Q100 Grade 1 qualification for under-hood automotive control modules.

For engineers reviewing the 74LV393PW-Q100 datasheet, 74LV393PW-Q100 pinout, 74LV393PW-Q100 application, or 74LV393PW-Q100 equivalent, key selection criteria include its dual-counter architecture with individual reset capability, low-voltage operation down to 1.0 V, propagation delay as low as 5 ns at 3.3 V, and guaranteed performance from −40 °C to +125 °C.

Technical Context

This device 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 input clock or preceding stage's output. Counting is asynchronous-no common clock distribution network required-and reset is fully asynchronous, forcing all four outputs LOW regardless of clock state.

Input clamp diodes enable safe interfacing with voltages exceeding VCC when used with current-limiting resistors. The design supports TTL-level inputs at VCC ≥ 2.7 V and exhibits low ground bounce (VOLP = 0.8 V typical) and output undershoot (VOHV = 2 V typical) at 3.3 V, critical for noise-sensitive automotive signal chains.

Key Specifications

Pinout & Package

TSSOP14 package (SOT402-1): 14-lead plastic thin shrink small outline, 4.4 mm body width, 0.65 mm lead pitch, moisture sensitivity level 1 (MSL1).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74LV393D-Q100, the PW variant trades thermal robustness for footprint reduction; compared with SN74LV393AQPWRQ1, it delivers higher output drive strength and lower VOL, improving noise immunity in electrically harsh vehicle domains.

Availability

74LV393PW-Q100 is available at Aetrix Electronics and suitable for automotive engine control units, ADAS sensor interfaces, body control modules, and infotainment power sequencing requiring stable component supply across extended temperature ranges.

Supply support for 74LV393PW-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 essential efficiency technologies, delivering high-performance logic, analog, and discrete devices for automotive, industrial, and consumer markets.

The 74LV393-Q100 belongs to Nexperia's automotive-qualified LV logic family, engineered specifically for low-voltage, high-reliability timing functions in harsh automotive environments where AEC-Q100 compliance and extended temperature operation are mandatory.

FAQ

What is the maximum clock frequency supported by the 74LV393PW-Q100?

The maximum clock frequency is 90 MHz at VCC = 3.3 V and Tamb = −40 °C to +125 °C, measured with CL = 50 pF. At 3.0 V, fmax drops to 24 MHz. This value reflects the shortest stable HIGH-to-LOW transition interval that guarantees correct ripple propagation through all four stages without metastability.

Can the two counters operate with different clock sources and reset signals?

Yes - 1CP and 2CP are electrically isolated clock inputs, and 1MR and 2MR are independent active-HIGH asynchronous reset lines. This allows completely separate timing domains: for example, Counter 1 can track wheel speed while Counter 2 monitors brake pedal actuation timing, each with dedicated clock and reset control.

Does the 74LV393PW-Q100 require external pull-up or pull-down resistors on its inputs?

No - inputs have built-in clamp diodes and defined VIH/VIL thresholds. However, if interfacing with open-drain or high-impedance sources, a pull-up resistor (e.g., 10 kΩ to VCC) may be needed to ensure valid HIGH levels. Unused inputs must be tied to VCC or GND to prevent floating states and excessive ICC.

How does the ripple architecture affect timing accuracy in cascaded configurations?

Ripple counters introduce cumulative propagation delay: tpd_total = tpd(1CP→1Q0) + tpd(1Q0→1Q1) + tpd(1Q1→1Q2) + tpd(1Q2→1Q3). At 3.3 V, this totals ~35 ns maximum, causing output skew between bits. For synchronous applications requiring aligned edges, a synchronous counter (e.g., 74LV161) is preferred-but ripple architecture minimizes power and gate count for simple division tasks.