group
CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out
Public Made by Adomby adom
2 interchangeable CD4021 parts (8-bit static shift register, parallel-in/serial-out) from 2 manufacturer(s), CD4000 family.
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cd4021-shift-registers: class group page from component-ocean logic-ics
2 files changed
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README.md+24@@ -1,3 +1,27 @@ # CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out 2 interchangeable CD4021 parts (8-bit static shift register, parallel-in/serial-out) from 2 manufacturer(s), CD4000 family.++Anything on this page is the same logical part: function code **4021** (8-Bit Static Shift Register, Parallel-In/Serial-Out) in the **CD4000** family. Pick by package and manufacturer.++## Members++| Part page | Manufacturer | Package |+|---|---|---|+| [CD4021BM96](https://wiki.adom.inc/ray/cd4021bm96) | Texas Instruments | |+| [HEF4021BT-Q100J](https://wiki.adom.inc/ray/hef4021bt-q100j) | NXP (legacy Philips) | |++## The CD4000 family++The original 1970s CMOS family. Wide supply range and slow propagation. Still useful for high-voltage CMOS or coin-cell designs where speed doesn't matter. TI's CD4xxxB and CD74HC4xxx, NXP/Philips HEF4xxxB, Onsemi MC14xxx, Toshiba TC4xxxBP are all this family.++| | |+|---|---|+| Supply range | 3.0 to 18.0 V (typ. 5.0 V) |+| Input threshold | CMOS |+| 5 V tolerant inputs | yes |+| Speed class | slow |++## Provenance++Grouped by component-ocean's logic-ics parser (`definitions/logic-ics/`), which resolves each vendor MPN to a family_id. Membership is recomputed from the published pages; it is not hand-curated.
page.json+66−68@@ -1,71 +1,69 @@ {- "schema_version": 1,- "slug": "cd4021-shift-registers",- "type": "component",- "kind": "group",- "version": "0.1.0",- "title": "CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out",- "brief": "2 interchangeable CD4021 parts (8-bit static shift register, parallel-in/serial-out) from 2 manufacturer(s), CD4000 family.",- "because": "CLASS group page: the shared home for every CD4021. A designer who needs a 8-bit static shift register, parallel-in/serial-out in the CD4000 family searches for CD4021, not for a vendor's ordering code; the 2 MPN pages below are functionally substitutable and differ only in manufacturer and package. Derived from component-ocean's logic-ics definitions.",- "hero": {- "type": "billboard",- "headline": "CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out",- "subhead": "2 interchangeable parts, one logical function."+ "schema_version": 1,+ "slug": "cd4021-shift-registers",+ "type": "component",+ "kind": "group",+ "version": "0.1.0",+ "title": "CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out",+ "brief": "2 interchangeable CD4021 parts (8-bit static shift register, parallel-in/serial-out) from 2 manufacturer(s), CD4000 family.",+ "because": "CLASS group page: the shared home for every CD4021. A designer who needs a 8-bit static shift register, parallel-in/serial-out in the CD4000 family searches for CD4021, not for a vendor's ordering code; the 2 MPN pages below are functionally substitutable and differ only in manufacturer and package. Derived from component-ocean's logic-ics definitions.",+ "hero": {+ "type": "billboard",+ "headline": "CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out",+ "subhead": "2 interchangeable parts, one logical function."+ },+ "author": {+ "name": "Ray",+ "email": "[email protected]"+ },+ "tags": [+ "logic",+ "cd4000",+ "shiftregister"+ ],+ "license": "proprietary",+ "visibility": {+ "public": true+ },+ "sample_prompts": [],+ "discovery_triggers": [+ "CD4021",+ "cd4021",+ "CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out"+ ],+ "discovery_pitch": "Every CD4021 on the wiki, cross-vendor, as one substitutable class.",+ "metadata": {+ "group_tier": "class",+ "member_count": 2,+ "family_id": "CD4021",+ "logic_family": "CD4000",+ "function_code": "4021",+ "function_class": "ShiftRegister"+ },+ "component": {+ "mpn": "CD4021",+ "manufacturer": "",+ "package": "",+ "pin_count": null,+ "category": "Logic ICs",+ "subcategory": "ShiftRegister",+ "body_size": null,+ "parts": {},+ "distributor_links": {},+ "logic": {+ "family_id": "CD4021",+ "logic_family": "CD4000",+ "function_code": "4021",+ "function_class": "ShiftRegister",+ "function_name": "8-Bit Static Shift Register, Parallel-In/Serial-Out" },- "tags": [- "logic",- "cd4000",- "shiftregister"- ],- "license": "proprietary",- "visibility": {- "public": true- },- "sample_prompts": [],- "discovery_triggers": [- "CD4021",- "cd4021",- "CD4021 8-Bit Static Shift Register, Parallel-In/Serial-Out"- ],- "discovery_pitch": "Every CD4021 on the wiki, cross-vendor, as one substitutable class.",- "metadata": {- "group_tier": "class",- "member_count": 2,- "family_id": "CD4021",- "logic_family": "CD4000",- "function_code": "4021",- "function_class": "ShiftRegister"- },- "component": {- "mpn": "CD4021",- "manufacturer": "",- "package": "",- "pin_count": null,- "category": "Logic ICs",- "subcategory": "ShiftRegister",- "body_size": null,- "parts": {},- "distributor_links": {},- "logic": {- "family_id": "CD4021",- "logic_family": "CD4000",- "function_code": "4021",- "function_class": "ShiftRegister",- "function_name": "8-Bit Static Shift Register, Parallel-In/Serial-Out"- },- "group": {- "tier": "class",- "member_count": 2,- "members": [- "CD4021BM96",- "HEF4021BT-Q100J"- ]- }- },- "author": {- "name": "Ray",- "email": "[email protected]"- },- "created_at": "2026-09-11T14:49:05.209Z",- "updated_at": "2026-09-11T14:49:05.209Z"+ "group": {+ "tier": "class",+ "member_count": 2,+ "members": [+ "CD4021BM96",+ "HEF4021BT-Q100J"+ ]+ }+ } }