Nexperia USA Inc. 74HCT164DB,118

Overview

74HCT164DB,118 from Nexperia is an 8-bit serial-in/parallel-out shift register with TTL-compatible inputs, dual gated serial data inputs (DSA and DSB), asynchronous master reset (MR), and edge-triggered clock (CP) operating on LOW-to-HIGH transitions. It delivers 8 parallel outputs (Q0–Q7), supports 4.5 V to 5.5 V supply, and is rated for -40 °C to +125 °C operation - used in LED matrix drivers, GPIO expansion, and serial-to-parallel data conversion in industrial control panels.

For engineers reviewing the 74HCT164DB,118 datasheet, 74HCT164DB,118 pinout, 74HCT164DB,118 application, or 74HCT164DB,118 equivalent, this device is selected for deterministic timing in synchronous digital systems requiring robust noise immunity, precise setup/hold timing (tsu = 12 ns, th = +4 ns at VCC = 4.5 V), and guaranteed low-power CMOS operation with TTL-level input compatibility.

Technical Context

The 74HCT164DB,118 implements a synchronous 8-stage D-type flip-flop shift register with gated serial data path logic: either DSA or DSB acts as an active-HIGH enable for the other, enabling flexible serial data routing. Its asynchronous MR input forces all Q outputs LOW independently of CP or data state.

It uses standard CMOS silicon with TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5 V to 5.5 V), operates with propagation delays as low as 17 ns (CP to Qn, typ. at VCC = 4.5 V), and features input clamp diodes allowing safe interfacing to voltages exceeding VCC when current-limited.

Key Specifications

Pinout & Package

74HCT164DB,118 is supplied in SSOP14 (SOT337-1) package: plastic shrink small outline, 14 leads, body width 5.3 mm. Pin numbering follows standard SSOP convention with pin 1 index marker at top-left corner.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit serial-in/parallel-out shift register applications.

Compared with 74HCT164D,118 and SN74HCT164N, the 74HCT164DB,118 offers superior board density and thermal performance in surface-mount production environments, while retaining identical timing, voltage, and logic behavior - making it optimal for volume-manufactured industrial controls where space and reflow compatibility are critical.

Availability

74HCT164DB,118 is available at Aetrix Electronics and suitable for LED display drivers, microcontroller I/O expansion, industrial serial bus interfaces, and legacy system data bridging requiring stable component supply across extended temperature ranges.

Supply support for 74HCT164DB,118 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 logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial, automotive, and computing markets.

The 74HCT164DB,118 belongs to Nexperia's 74HCT logic family - engineered for seamless integration with TTL-based systems while delivering CMOS power efficiency and robust ESD tolerance in compact surface-mount packages.

FAQ

What is the maximum clock frequency supported by the 74HCT164DB,118?

The 74HCT164DB,118 supports a maximum clock frequency of 55 MHz (typical) at VCC = 4.5 V with CL = 15 pF, and 45 MHz (min) over the full -40 °C to +125 °C temperature range. This is verified per Table 7 in the Nexperia datasheet Rev. 11, with timing measured using standard test conditions (tr/tf = 6 ns, VM = 1.3 V).

Can DSA and DSB be used simultaneously for data input?

No - DSA and DSB operate as a gated pair: one serves as data input only when the other is held HIGH. For example, data enters via DSA only if DSB = HIGH; if DSB = LOW, DSA is ignored. This is defined in the Function Table (Table 3) and confirmed in the Functional Diagram (Fig. 4).

Is the 74HCT164DB,118 pin-compatible with the 74HC164DB variant?

Yes - both share identical pinout, package (SSOP14/SOT337-1), and logic functionality. The key difference is input threshold: 74HCT164DB accepts TTL levels (VIH = 2.0 V), while 74HC164DB requires CMOS levels (VIH = 3.15 V at VCC = 4.5 V). Electrical substitution is valid only when driving sources meet the respective input voltage requirements.

Does the master reset (MR) affect the clock input behavior?

No - MR is fully asynchronous and independent of CP. When MR is LOW, all Q outputs force LOW immediately, regardless of CP state or timing. The register remains cleared until MR returns HIGH, after which normal clocked shifting resumes on the next CP rising edge - as specified in the Function Table (Table 3) and Functional Description section.