SN74HCS74QPWRQ1

SN74HCS74QPWRQ1 is TI’s dual D-type flip-flop in the 74HCS CMOS family. Each of the two flip-flops has D, CLK (positive edge trigger), asynchronous PREn (set) and CLRn (clear), and Q/Q̄ outputs. On a rising clock edge, Q takes the value of D. PREn and CLRn are active-low and operate asynchronously to the clock. The device typically runs from about 2 V to 6 V and offers TTL‑compatible inputs with low power, high speed CMOS performance. It comes in standard RoHS‑compliant packages (e.g., PDIP, SOIC, TSSOP) in a 14‑pin arrangement, sometimes designated with QPWRQ1 in TI’s packaging scheme. Applications include registers, counters, shift registers, state machines, and timing/storage tasks in digital logic. Important notes: do not assert PREn and CLRn simultaneously; if both are asserted, the output state may be undefined.

Equivalent parts (pin-compatible 14-pin dual D-type FFs with preset/clear at 5V):
- 74HC74 (and MC74HC74)
- 74HCT74 (and MC74HCT74)
These are standard equivalents from various vendors (ST, NXP, ON Semiconductor, etc.) and are functionally the same as SN74HCS74.

SN74HCS74QPWRQ1 features:
- Dual D-type, positive-edge-triggered flip-flops
- Each flip-flop has asynchronous preset (PRE) and clear (CLR) inputs (active-low)
- Q and Q̄ outputs for each flip-flop
- Independent clock inputs (one clock per flip-flop)
- Wide operating voltage: 2 V to 6 V; TTL-compatible inputs
- High-speed CMOS (HCS) technology with low power consumption
- 8-pin package options (DIP/SOIC) per TI packaging
These underlie its use as a pair of edge-triggered memory elements with asynchronous set/reset and CMOS-level performance.

- Pin count: 14 pins.
- Function: Dual positive-edge-triggered D-type flip-flop with asynchronous preset (PRE) and clear (CLR) inputs. Each flip-flop has D, CP (clock), PRE, CLR, and outputs Q and Q' (Qbar). Used for data storage/synchronization.

Manufacturer: Texas Instruments Incorporated (TI).
Company type: American multinational semiconductor company that designs and manufactures a wide range of integrated circuits (analog, digital, mixed-signal) and other electronics products.

SN74HCS74QPWRQ1 is a dual D-type, positive-edge-triggered flip-flop with asynchronous preset and clear. Typical application areas:
- Data storage and transfer: registers, shift registers, pipelines
- Sequential logic: finite-state machines, counters, timing/control circuits
- Data synchronization: clock-domain crossing (with proper design)
- Digital interfaces and microcontroller/DSP logic: framing, control signals, simple memory elements
- Edge-triggered latching and pulse generation, debouncing and timing delay circuits
In short: it serves as the fundamental building block for clocked storage, sequencing, and timing in digital systems.

It’s a 14‑pin small‑outline package (SOIC), RoHS-compliant (lead‑free) edition, as indicated by the QPWRQ1 suffix.