The document describes the features and characteristics of the Harris Semiconductor SCHS140E, including asynchronous set and reset, Schmitt trigger clock inputs, maximum operating frequency, operating temperature range, etc.
The CD74HC109 and CD74HCT109 are dual J‑K flip‑flops featuring asynchronous set and reset inputs and positive‑edge‑triggered clock inputs. They operate over a wide temperature range and offer both HC (2 V‑6 V) and HCT (4.5 V‑5.5 V) supply options, with high noise immunity and low power consumption.
The datasheet lists detailed absolute‑maximum ratings, DC electrical specifications, switching timing parameters, test circuits, and packaging information. Various package options are available (CERDIP, PDIP, SOIC) with ordering suffixes indicating tape‑and‑reel or reel‑only formats. The document also includes TI’s product status and environmental compliance notes.
| Maximum clock frequency (f_MAX) | 54 MHz at VCC = 5 V |
|---|---|
| Operating temperature range | -55 °C to 125 °C |
| HC supply voltage range | 2 V to 6 V |
| HCT supply voltage range | 4.5 V to 5.5 V |
The devices are rated for temperatures from –55 °C up to 125 °C.
HC versions operate from 2 V to 6 V, while HCT versions operate from 4.5 V to 5.5 V.
They can operate up to 54 MHz when powered at 5 V.