Logic - Shift Registers

Part Number	Description / PDF	Quantity
TPIC6A595DW Texas Instruments	IC 8-BIT SHIFT REGISTER 24-SOIC	431
CD4035BM96 Texas Instruments	IC SHIFT REG PIN/P-OUT 16-SOIC	2210
CD74HCT166EG4 Texas Instruments	IC 8-BIT PAR/SER SHIFT REG 16DIP	0
TPIC6596DWRG4 Texas Instruments	IC PWR 8-BIT SHIFT REGIS 20-SOIC	0
CD74HC595EG4 Texas Instruments	IC SHIFT REGISTER 8-BIT 16-DIP	0
CD74HCT597M96 Texas Instruments	IC SHIFT REGISTR 8BIT HS 16-SOIC	45
SN74LV595AD Texas Instruments	8BIT SHFT REG 3STATE OTPT 16SOIC	752
SN74LS194AD Texas Instruments	IC BI-DIR UNIV SHIFT REG 16SOIC	229
SN74ALS323N Texas Instruments	SN74ALS323 8-BIT UNIVERSAL SHIFT	0
SN74LS671DW Texas Instruments	PARALLEL IN PARALLEL OUT	1590
JM38510/07601BFA Texas Instruments	PARALLEL IN PARALLEL OUT	5
SN74HCS16507QPWRQ1 Texas Instruments	AUTOMOTIVE 8-BIT PARALLEL-LOAD S	2000
CD74HC194MT Texas Instruments	PARALLEL IN PARALLEL OUT	7500
SN74LV165AMPWREP Texas Instruments	IC PAR-LOAD 8B SHFT REG 16TSSOP	837
SN74LV164APW Texas Instruments	IC REGISTER PAR-OUT 8BIT 14TSSOP	2593
SN74LS323N3 Texas Instruments	SHIFT REGISTER, 8-BIT, TTL	2902
TPIC6B596N Texas Instruments	IC PWR 8-BIT SHIFT REGIS 20-DIP	254
SN74HC595D Texas Instruments	IC 8-BIT SHIFT REGISTER 16-SOIC	1871
SN74LV594APWT Texas Instruments	IC 8-BIT SHFT REG W/OUT 16-TSSOP	560
SN74LS195AN Texas Instruments	PARALLEL IN PARALLEL OUT, LS SER	0

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