74574 Octal D-Type Flip-Flop With 3-State Outputs DIP IC

74574 Octal D-Type Flip-Flop With 3-State Outputs DIP IC

The 74574 Octal D-Type Flip-Flop is a high-speed CMOS/TTL-compatible integrated circuit that contains eight independent D-type flip-flops with 3-state outputs. It is designed to store and transfer digital data based on clock signals, making it ideal for use in registers, data latches, and bus-oriented systems. The 3-state output feature allows the outputs to be placed in a high-impedance state, enabling multiple devices to share a common data bus without interference.

This IC operates by capturing input data on the rising edge of the clock signal and holding it until the next clock cycle. Its DIP package makes it easy to use in prototyping and through-hole PCB designs. The 74574 is widely used in digital circuits for temporary data storage, signal buffering, and interfacing between different parts of a system, especially in microprocessor and microcontroller applications.

Features:

• Eight independent D-type flip-flops in one package.
• 3-state outputs for bus-oriented applications.
• Edge-triggered clock operation.
• High-speed performance.
• Compatible with TTL logic levels.
• Low power consumption.
• High noise immunity.
• Suitable for synchronous data storage.

Specifications:

Parameter	Conditions	Min	Typ	Max	Unit
Supply Voltage (Vcc)	Operating	4.75	5.0	5.25	V
Output High Voltage	Ioh = -400 µA	2.7	3.4	–	V
Output Low Voltage	Iol = 8 mA	–	0.35	0.5	V
Input High Voltage	–	2.0	–	–	V
Input Low Voltage	–	–	–	0.8	V
Input Current (High)	Vin = 2.7V	–	–	20	µA
Input Current (Low)	Vin = 0.4V	–	–	-400	µA
Supply Current (Icc)	No load, all outputs high	–	50	85	mA
Clock Frequency (Max)	–	30	–	–	MHz
Propagation Delay (CP to Q)	–	–	20	28	ns
Propagation Delay (OE to Q)	–	–	18	28	ns
Setup Time (D to CP)	–	20	–	–	ns
Hold Time (D to CP)	–	5	–	–	ns
Pulse Width (Clock)	–	20	–	–	ns
Operating Temperature	–	0	–	70	°C

Pinout:

Pin	Name	Description
1	OE	Output Enable (active low for 3-state outputs)
2	D0	Data input 0
3	D1	Data input 1
4	D2	Data input 2
5	D3	Data input 3
6	D4	Data input 4
7	D5	Data input 5
8	D6	Data input 6
9	D7	Data input 7
10	GND	Ground (0V)
11	CP	Output 7
12	07	Output 6
13	06	Output 5
14	05	Output 4
15	04	Output 3
16	03	Output 2
17	02	Output 1
18	01	Output 0
19	00	Clock Pulse (rising edge triggered)
20	VCC	Positive supply voltage (+5V)

Applications:

• Data storage registers.
• Microprocessor and microcontroller systems.
• Bus interfacing and buffering.
• Digital signal synchronization.
• Memory addressing circuits.
• Parallel data transfer systems.

Package Includes:

• 1x 74574 Octal D-Type Flip-Flop With 3-State Outputs DIP IC.

Documents:

• 74574 Datasheet.