Logic - Shift Registers

Part Number	Description / PDF	Quantity
SN74HC164NS Texas Instruments	LOGIC GATES AND INVERTERS	2034
TPIC6595N Texas Instruments	IC PWR 8-BIT SHIFT REGIS 20-DIP	953
SNJ54HC164J Texas Instruments	54HC164 8-BIT PARALLEL-OUT SERIA	101
SN74AHC595QPWRQ1 Texas Instruments	IC SHIFT REGISTER SGL 8B 16TSSOP	1892
SN74LS96D Texas Instruments	PARALLEL IN PARALLEL OUT	7940
TPIC6C596PWG4 Texas Instruments	IC PWR 8-BIT SHIFT REGIS 16TSSOP	0
SN74AHC594NSR Texas Instruments	IC SHIFT REGISTER 8BIT 16SO	1114
SN74HC595ADBR Texas Instruments	SN74HC595ADBR	1138
SN74LS165AN Texas Instruments	IC PAR-LD 8BIT SHIFT REG 16-DIP	1711
SNJ54S195J Texas Instruments	PARALLEL IN PARALLEL OUT	165
CD4094BPWR Texas Instruments	IC BUS REGISTER 8STAGE 16-TSSOP	515
SN74ALS166DRE4 Texas Instruments	PARALLEL IN SERIAL OUT	5000
CD4015BM Texas Instruments	IC DUAL 4STAGE SHIFT REG 16-SOIC	1927
SN74ALS166DR Texas Instruments	SN74ALS166 PARALLEL-LOAD 8-BIT S	11501
CD74HC4094MT Texas Instruments	IC 8STG SHFT/STOR BUS REG 16SOIC	750
SN74LS672J Texas Instruments	PARALLEL IN PARALLEL OUT	560
74AC11194N Texas Instruments	PARALLEL IN PARALLEL OUT	1080
SN74LV164ANS Texas Instruments	SERIAL IN PARALLEL OUT	5650
CD4014BM96 Texas Instruments	IC STATIC SHFT REG 8STG 16SOIC	0
CD4021BMG4 Texas Instruments	CD4021B CMOS 8-STAGE STATIC SHIF	640

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