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| Part Number | CD4021BCM | CD4021BCN | CD4021BM | CD4021BCMX |
|---|---|---|---|---|
| Manufacturer | Fairchild Semiconductor | Fairchild Semiconductor | Texas Instruments | Fairchild Semiconductor |
| Product Status | Obsolete | Obsolete | Active | Obsolete |
| Logic Type | Shift Register | Shift Register | Shift Register | Shift Register |
| Output Type | Push-Pull | Push-Pull | Push-Pull | Push-Pull |
| Number of Elements | 1 | 1 | 1 | 1 |
| Number of Bits per Element | 8 | 8 | 8 | 8 |
| Function | Parallel or Serial to Serial | Parallel or Serial to Serial | Parallel or Serial to Serial | Parallel or Serial to Serial |
| Voltage - Supply | 3V ~ 18V | 3V ~ 18V | 3V ~ 18V | 3V ~ 18V |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Mounting Type | Surface Mount | Through Hole | Surface Mount | Surface Mount |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-DIP (0.300", 7.62mm) | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) |
| Supplier Device Package | 16-SOIC | 16-PDIP | 16-SOIC | 16-SOIC |
