CD4021BNSRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CD4021BNSRG4 is a CMOS 8-Stage Static Parallel-In Serial-Out Shift Register from Texas Instruments in a 16-pin SOIC package. It operates at up to 3 MHz clock frequency with a 50 pF load capacitance, featuring additional tap outputs at stages 6 and 7. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- CD4021BNSRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-stage parallel-in serial-out (PISO) shift register enabling efficient parallel-to-serial data conversion
- Maximum clock frequency of 3 MHz supporting moderate-speed serial communication applications
- Additional output taps at 6th and 7th shift register stages for flexible data extraction
- Dual PISO and SISO operation modes providing design flexibility in a single 16-pin SOIC device
Applications
The CD4021BNSRG4 is ideal for parallel-to-serial data conversion in microcontroller interfacing, keyboard scanning, and sensor data multiplexing applications. Its 8-stage shift register with intermediate taps at stages 6 and 7 enables flexible data extraction for protocol conversion and serial communication systems. It is commonly used in industrial automation, consumer electronics, and embedded systems requiring CMOS-compatible shift register functionality.
Specifications
| YTEOL | 0 |
| Additional Feature | OUTPUTS ALSO AVAILABLE AT 6TH AND 7TH STAGE OF THE SHIFT REGISTER ;ALSO OPERATES AS SISO |
| Count Direction | RIGHT |
| Family | 4000/14000/40000 |
| JESD-30 Code | R-PDSO-G16 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | PARALLEL IN SERIAL OUT |
| Max Frequency@Nom-Sup | 3000000Hz |
| Number of Bits | 8 |
| Number of Functions | 1 |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR, 13 INCH |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Propagation Delay (tpd) | 320ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 18V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | MILITARY |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Trigger Type | POSITIVE EDGE |
| fmax-Min | 8.5MHz |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for CD4021BNSRG4:
Parallel In Serial Out, 4000/14000/40000 Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Parallel In Serial Out, 4000/14000/40000 Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Parallel In Serial Out, 4000/14000/40000 Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Parallel In Serial Out, 4000/14000/40000 Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Parallel In Serial Out, 4000/14000/40000 Series, 8-Bit, Right Direction, True Output, CMOS, PDSO16
Frequently Asked Questions
What is the CD4021BNSRG4 and what does it do?
The CD4021BNSRG4 is a CMOS 8-Stage Static Shift Register from Texas Instruments configured for Parallel-In Serial-Out (PISO) operation. It can load 8 bits of parallel data simultaneously and shift them out serially, with additional outputs available at stages 6 and 7. It also supports Serial-In Serial-Out (SISO) mode for chained configurations.
What is the maximum clock frequency of the CD4021BNSRG4?
The CD4021BNSRG4 operates at a maximum clock frequency of 3 MHz at nominal supply voltage with a 50 pF load capacitance. This makes it suitable for moderate-speed serial data conversion applications such as keyboard scanning, sensor polling, and low-speed serial bus interfaces.
What package and pin count does the CD4021BNSRG4 use?
The CD4021BNSRG4 is housed in a 16-pin Small Outline IC (SOIC) package with JESD-30 code R-PDSO-G16. The surface-mount package is compatible with standard automated PCB assembly processes and suits compact board designs.
Can the CD4021BNSRG4 be used in daisy-chained configurations?
Yes, the CD4021BNSRG4 supports Serial-In Serial-Out (SISO) operation in addition to its primary PISO mode. Multiple devices can be cascaded in a daisy-chain configuration, allowing expansion to 16, 24, or more parallel input bits while sharing a single serial data line to the host controller.
What is the lifecycle status of the CD4021BNSRG4?
The CD4021BNSRG4 has a YTEOL (Years to End of Life) value of 0, which indicates this product may be near or at end-of-life status. Designers should verify current availability with Texas Instruments or authorized distributors and consider lifecycle risk when designing new products. Existing stock may still be available from distributors worldwide.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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