Nexperia USA Inc. 74HC193DB-Q100J

Overview

74HC193DB-Q100 from Nexperia is a presettable synchronous 4-bit binary up/down counter with asynchronous parallel load (PL), asynchronous master reset (MR), dual edge-triggered clocks (CPU/CPD), and active-low terminal count outputs (TCU/TCD). It operates from 2.0 V to 6.0 V, supports automotive-grade temperature range (−40 °C to +125 °C), and is qualified to AEC-Q100 Grade 1. Used in cascaded multistage counters for odometers, position tracking, and programmable logic controllers.

For engineers reviewing the 74HC193DB-Q100 datasheet, 74HC193DB-Q100 pinout, 74HC193DB-Q100 application, or 74HC193DB-Q100 equivalent, key selection considerations include its dual-clock synchronous counting architecture, TTL-compatible input variants (74HCT193-Q100), propagation delay at 4.5 V (23 ns typ), terminal count output waveform duplication capability, and SO16/TSSOP16 package options for board space-constrained automotive control modules.

Technical Context

This device implements four D-type flip-flops with synchronous up/down counting logic controlled by separate CPU and CPD inputs. Count direction is determined by holding the inactive clock HIGH - only one clock may be HIGH at a time to ensure deterministic behavior. The TCU and TCD outputs replicate the respective clock edges at terminal states (15 and 0), enabling direct daisy-chaining without external logic.

Asynchronous functions dominate critical control paths: PL loads D0–D3 into Q0–Q3 independent of clock edges; MR forces all outputs LOW regardless of clock or load state. Input clamp diodes allow interfacing with voltages exceeding VCC when used with current-limiting resistors - a key feature for mixed-voltage automotive subsystems.

Key Specifications

Pinout & Package

74HC193DB-Q100 is supplied in SO16 (SOT109-1) plastic small outline package, 16-pin, 3.9 mm body width, with standard JEDEC MS-012 footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 4-bit synchronous up/down counter applications.

Compared with 74HCT193DB-Q100, the subject part offers superior noise immunity and wider supply flexibility but requires CMOS-level input drive; versus SN74LS193N, it delivers automotive qualification, lower power, and faster operation - making it the sole choice for modern vehicle ECUs.

Availability

74HC193DB-Q100 is available at Aetrix Electronics and suitable for automotive instrument clusters, motor control feedback systems, and industrial programmable logic controllers requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC193DB-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 delivering high-performance, reliable components for automotive, industrial, and consumer markets, with leadership in logic, discrete, and MOSFET technologies.

The 74HC193-Q100 belongs to Nexperia's automotive-qualified HC logic family, designed specifically for robust, low-power counting and sequencing in harsh-temperature vehicle subsystems where functional safety and long-term supply stability are mandatory.

FAQ

What is the maximum operating frequency of the 74HC193DB-Q100 at 5.0 V?

At VCC = 5.0 V, the maximum clock frequency is 20 MHz (min) with typical performance reaching 41 MHz. This is confirmed in Table 8 of the datasheet under "fmax" for 74HC193-Q100 at 4.5 V and extrapolated per characterization curves - sufficient for most automotive pulse-counting applications below 10 MHz.

Can the 74HC193DB-Q100 count up and down simultaneously?

No. Simultaneous up/down counting is undefined and prohibited: the datasheet explicitly states "Only one clock input can be held HIGH at any time to guarantee predictable behavior." Driving both CPU and CPD HIGH violates the function table and may cause metastability or incorrect state transitions.

How does the TCU output behave during terminal count?

When the counter reaches 15 (1111), the next LOW-to-HIGH transition of CPU causes TCU to go LOW. TCU remains LOW until CPU returns HIGH - effectively duplicating the CPU waveform. This behavior is defined in Section 1 and verified in Figure 9 (clock-to-TCU propagation delay).

Is the 74HC193DB-Q100 pin-compatible with non-automotive 74HC193 variants?

Yes - the SO16 (SOT109-1) package and pinout match industry-standard 74HC193 devices. However, the -Q100 suffix denotes AEC-Q100 qualification, extended temperature screening (−40 °C to +125 °C), and enhanced reliability testing; electrical specs align with standard HC logic but with tighter parametric limits over full automotive range.