SN74HCS74

ACTIVE

Schmitt-trigger input dual D-type positive-edge-triggered flip-flops w/ clear and preset

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Product details

Parameters

Number of channels (#) 2 Technology Family HCS Supply voltage (Min) (V) 2 Supply voltage (Max) (V) 6 Input type Schmitt-Trigger Output type Push-Pull Clock Frequency (Max) (MHz) 65 IOL (Max) (mA) 7.8 IOH (Max) (mA) -7.8 ICC (Max) (uA) 2 Features Balanced outputs, High speed (tpd 10-50ns), Positive input clamp diode open-in-new Find other D-type flip-flops

Package | Pins | Size

SOIC (D) 14 52 mm² 8.65 x 6 TSSOP (PW) 14 32 mm² 5 x 6.4 WQFN (BQA) 14 open-in-new Find other D-type flip-flops

Features

  • Wide operating voltage range: 2 V to 6 V
  • Schmitt-trigger inputs allow for slow or noisy input signals
  • Low power consumption
    • Typical ICC of 100 nA
    • Typical input leakage current of ±100 nA
  • ±7.8-mA output drive at 6 V
  • Extended ambient temperature range: –40°C to +125°C, TA
open-in-new Find other D-type flip-flops

Description

The device contains two independent D-type positive-edge-triggered flip-flops. All inputs include Schmitt triggers, allowing for slow or noisy input signals. A low level at the preset ( PRE) input sets the output high. A low level at the clear ( CLR) input resets the output low. Preset and clear functions are asynchronous and not dependent on the levels of the other inputs. When PRE and CLR are inactive (high), data at the data (D) input meeting the setup time requirements is transferred to the outputs (Q, Q) on the positive-going edge of the clock (CLK) pulse. Clock triggering occurs at a voltage level and is not directly related to the rise time of the input clock (CLK) signal. Following the hold-time interval, data at the data (D) input can be changed without affecting the levels at the outputs (Q, Q).

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Technical documentation

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Type Title Date
* Data sheet SN74HCS74 Schmitt-Trigger Input Dual D-Type Positive-Edge-Triggered Flip-Flops datasheet (Rev. C) Jan. 28, 2021
Application note Simplifying Solid-State Relay Designs With Logic Jan. 08, 2021

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
document-generic User guide
10
Description
This EVM is designed to support any logic device that has a D, DW, DB, NS, PW, P, N, or DGV package in a 14 to 24 pin count.
Features
  • Board design allows for versatility in evaluation
  • Supports a wide-range of logic devices
EVALUATION BOARD Download
document-generic User guide
20
Description
Flexible EVM designed to support any logic or translation device that has a BQA, BQB, RGY (14-24 pin), RSV, RJW, or RHL package.
Features
  • Board design allows for versatility in evaluation
  • Supports a wide-range of logic and translation devices with included dual supply support
  • Board has 9 sections that can be broken apart for a smaller form factor

Design tools & simulation

SIMULATION MODEL Download
SCEM593A.ZIP (51 KB) - IBIS Model
SIMULATION MODEL Download
SCEM774.ZIP (7 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
SOIC (D) 14 View options
TSSOP (PW) 14 View options
WQFN (BQA) 14 View options

Ordering & quality

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  • Qualification summary
  • Ongoing reliability monitoring

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