74HC74 LOGIC GATE IC (INTEGRATED CIRCUIT) – KSH 150 at HIMASTORES Mombasa – best electronics in Kenya
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74HC74 LOGIC GATE IC (INTEGRATED CIRCUIT)

SKU: HMJ1081 Category: Intergrated circuits
KSH 150.00
In Stock

Product Description

74HC74 Dual DType Positive EdgeTriggered Flip-Flop IC

Precision Dual Flip-Flop with Set and Reset for Synchronous Logic

The 74HC74 is a highspeed CMOS logic IC containing two independent Dtype flipflops with set and reset functions. Each flipflop features individual data (D), clock (CP), set (SD), and reset (RD) inputs, along with complementary Q and Q outputs [citation:1]. Data at the D input is transferred to the Q output on the LOWtoHIGH clock transition, making it ideal for frequency division, data storage, shift registers, and synchronizing asynchronous signals [citation:1][citation:7].

Operating voltage range: 2.0V to 6.0V [citation:3]
Schmitt-trigger action on clock input ensures high tolerance to slow rise/fall times [citation:1]
Propagation delay: 14ns typical at 5V [citation:4]
Do not exceed 7.0V supply voltage - permanent damage may occur [citation:3]
Unused inputs must be tied to VCC or GND - floating inputs can cause oscillation [citation:3]

Technical Specifications

ParameterValue
Supply Voltage (VCC)2.0V to 6.0V [citation:3]
Input Voltage0V to VCC [citation:3]
Output Current±5.2mA (at 6V) [citation:4]
Propagation Delay14ns typical (at 5V, CL=15pF) [citation:5]
Maximum Clock Frequency82MHz [citation:4]
Operating Temperature-40°C to +125°C [citation:1]
Package TypesDIP14, SOIC14, TSSOP-14 [citation:1]
Number of Flip-Flops2 (dual Dtype, positive edgetriggered)

= Pin Configuration (DIP14/SOIC14/TSSOP-14) =

PinNameFunction
11RDFlip-Flop 1 Asynchronous Reset (Active LOW) [citation:2]
21DFlip-Flop 1 Data Input [citation:2]
31CPFlipFlop 1 Clock Input (LOWto-HIGH trigger) [citation:2]
41SDFlip-Flop 1 Asynchronous Set (Active LOW) [citation:2]
51QFlip-Flop 1 Normal Output [citation:2]
61QFlip-Flop 1 Complementary Output [citation:2]
7GNDGround (0V) [citation:2]
82QFlip-Flop 2 Complementary Output [citation:2]
92QFlip-Flop 2 Normal Output [citation:2]
102SDFlip-Flop 2 Asynchronous Set (Active LOW) [citation:2]
112CPFlipFlop 2 Clock Input (LOWto-HIGH trigger) [citation:2]
122DFlip-Flop 2 Data Input [citation:2]
132RDFlip-Flop 2 Asynchronous Reset (Active LOW) [citation:2]
14VCCSupply Voltage (2V to 6V) [citation:2]

= Function Table (Per Flip-Flop) =

Set (SD)Reset (RD)Clock (CP)Data (D)Q OutputQ Output
LOWHIGHXXHIGHLOW [citation:9]
HIGHLOWXXLOWHIGH [citation:9]
LOWLOWXXHIGH*HIGH* [citation:3]
HIGHHIGH↑ (Rising)HIGHHIGHLOW [citation:9]
HIGHHIGH↑ (Rising)LOWLOWHIGH [citation:9]
HIGHHIGHLOWXNo ChangeNo Change [citation:3]

*Both outputs HIGH while SD and RD are LOW; output states unpredictable if both go HIGH simultaneously [citation:3].

Key Features

Two Independent FlipFlops Dual functionality in a single 14-pin package

Asynchronous Set and Reset - Direct control for clearing or presetting outputs

Complementary Outputs - Both Q and Q available for differential signaling

Wide Supply Range - Operates from 2V to 6V for flexible integration

Low Power Consumption 8µA quiescent current ideal for battery-powered designs

High Noise Immunity - CMOS inputs ensure reliable operation in noisy environments

Schmitt Trigger Clock Input - Tolerant to slow clock edges [citation:1]

= Applications =

  • Frequency division and counting circuits
  • Shift registers and data storage
  • Synchronizing asynchronous signals [citation:7]
  • Controlled delay generation [citation:7]
  • Interface between asynchronous and synchronous systems [citation:7]
  • Toggle switch from momentary switch input [citation:10]
  • Divide clock signal by 2 or 4 [citation:10]
  • State machines and sequential logic
Dual FlipFlop Design Two storage elements in one compact package
Asynchronous Preset and Clear - Independent set and reset control pins

√ Industry-standard 74HC74 pinout for easy replacement

√ Low power consumption - 8µA typical quiescent current

√ Fully tested and guaranteed functional

Package Includes

  1. 1x 74HC74 Logic IC (Package: DIP14, SOIC14, or TSSOP-14 per variant)
  2. Anti-static packaging for safe delivery
Use 0.1µF decoupling capacitor near VCC pin for stable operation
For frequency division, connect Q output back to D input
This IC is also available as 74HCT74 for TTL-compatible input levels [citation:1]
For toggling, connect Q output to D input - each clock pulse divides frequency by 2
Pair with 74HC74 in shift register applications for serial data handling
Never leave inputs floating use pullup or pull-down resistors
ESD sensitive device - use proper handling procedures
Ensure set and reset are never simultaneously LOW for predictable operation