Logic - Shift Registers

Part Number	Description / PDF	Quantity
NPIC6C596ABQX Nexperia	IC SHIFT REGISTER 8BIT 16DHVQFN	4604
CD74HCT164E Texas Instruments	IC 8-BIT SHIFT REGISTER HS 14DIP	958
54199DM	SHIFT REGISTER, 8-BIT, TTL	790
MM74HC164M Sanyo Semiconductor/ON Semiconductor	IC SHIFT REG 8BIT PISO 14-SOIC	261
74HC164PW-Q100J Nexperia	NOW NEXPERIA 74HC164PW-Q100 - SE	3363
74LV164D-Q100J Nexperia	IC SHIFT REGISTER 8BIT 14SOIC	0
74HC164BQ,115 Nexperia	IC SHIFT REGISTER 8BIT DHVQFN14	821
SN74HCS165PWR Texas Instruments	8-BIT PARALLEL-LOAD SHIFT REGIST	6369
CD74HCT4015E	STATIC SHIFT REGISTER	1931
SN74S194N Texas Instruments	PARALLEL IN PARALLEL OUT	18000
SN74HC164PWT Texas Instruments	IC SHIFT REGISTER 8BIT 14-TSSOP	97
MM74C164M	SERIAL IN PARALLEL OUT	19719
AM29824PC	BUS INTERFACE REGISTERS	2453
CD74HCT165EX	8-BIT SHIFT REGISTER	0
CD40104BD	UNIVERSAL SHIFT REGISTER	37
MC74HC597ADTR2G Sanyo Semiconductor/ON Semiconductor	IC SHIFT REGISTER 8-BIT	4507
74HC194N,652 NXP Semiconductors	PARALLEL IN PARALLEL OUT	8450
SN74HC166AIPWRG4Q1 Texas Instruments	IC SHIFT REGISTER SGL 8B 16TSSOP	2000
M74HCT4094ADTR2G	8-BIT SHIFT AND STORE REGISTER W	25000
NLV14094BDR2G	SERIAL IN PARALLEL OUT, 4000/140	6947

Logic - Shift Registers

1. Overview

Logic shift registers are sequential logic circuits used to store and transfer data in digital systems. They consist of cascaded flip-flops controlled by a common clock signal, enabling data movement in serial or parallel formats. These ICs are fundamental in applications requiring data buffering, serial-to-parallel conversion, and timing control. Their importance spans modern computing, telecommunications, and embedded systems, where efficient data manipulation is critical.

2. Main Types and Functional Classification

Type	Functional Features	Application Examples
Serial-In Parallel-Out (SIPO)	Converts serial data to parallel output	Communication interfaces (RS-232), data acquisition systems
Parallel-In Serial-Out (PISO)	Converts parallel data to serial output	Digital signal processing, sensor networks
Serial-In Serial-Out (SISO)	Shifts data in and out serially	Delay lines, data encryption
Parallel-In Parallel-Out (PIPO)	Direct parallel data transfer	CPU register files, memory buffers
Bidirectional Shift Registers	Supports left/right data movement	Arithmetic logic units (ALUs), network switches
Multifunction Shift Registers	Programmable shift directions and modes	FPGA I/O interfaces, test equipment

3. Structure and Composition

Typical shift register ICs are built using CMOS or TTL semiconductor processes. The core structure includes:

Cascaded Flip-Flops: D-type flip-flops connected in series for data storage stages
Control Logic: Clock dividers, direction control gates, and reset circuits
Input/Output Buffers: Level shifters and drivers for signal integrity
Power Distribution: VCC/GND rails with decoupling capacitors

Common packaging includes DIP, SOIC, and QFP formats with 8-48 pins. Advanced ICs integrate features like three-state outputs and error detection circuits.

4. Key Technical Specifications

Parameter	Description
Clock Frequency	Maximum operating frequency (1 MHz - 200 MHz), determines data transfer rate
Supply Voltage	Typical range 2.0V-5.5V for CMOS devices
Input/Output Type	CMOS/TTL compatibility, differential signaling (LVDS)
Propagation Delay	Time between clock edge and output change (ns range)
Power Consumption	Quiescent current ( A/MHz) and dynamic power dissipation
Operating Temperature	Industrial (-40 C to +85 C) or commercial (0 C to 70 C) ranges
Data Width	8/16/32/64-bit configurations

5. Application Areas

Telecommunications: Line drivers/receivers, protocol converters (USB/Ethernet)
Computing: CPU cache control, GPU memory interfaces
Industrial Automation: PLC data buses, motor controllers
Consumer Electronics: Display drivers (LCD/OLED), audio codecs
Automotive: CAN bus transceivers, ADAS sensor interfaces

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
TI (Texas Instruments)	SN74HC595N	8-bit SIPO, 3-state output, 100 MHz clock
NXP Semiconductors	74LVC164245	16-bit bidirectional, 2.3V-3.6V supply
STMicroelectronics	CD4014BM	8-stage PISO, 20V tolerant inputs
ON Semiconductor	MC74VHC164	Low power, 2V-5.5V operation
Microchip Technology	SRM74HC165	8-bit PISO with parallel load

7. Selection Guidelines

Define data interface type (serial/parallel, bidirectional)
Match clock speed requirements with propagation delay specifications
Verify voltage compatibility with host system (e.g., 3.3V/5V logic levels)
Consider package type based on PCB space constraints (TSSOP vs. QFN)
Evaluate temperature and reliability needs for industrial/automotive applications
Check for additional features like error detection or daisy-chaining support

8. Industry Development Trends

Integration: Combining shift registers with level shifters and protocol converters in single packages
Power Efficiency: Sub-1V operation and leakage current reduction for IoT devices
Higher Speeds: GDDR6/DDR5 memory interface ICs with >1 Gbps per pin performance
Miniaturization: WLCSP packages for wearable electronics (e.g., 0.4mm pitch devices)
Automotive Focus: AEC-Q100 qualified parts with fault-tolerant designs for ADAS systems
Intelligence: Embedded configuration registers and thermal shutdown protection