Cherry M8 part number schema
This page summarises the Cherry M8 part number schema. See common schema for a more detailed look at the Cherry part number schema.
Contents
Sources
- Cherry Keymodule M8 brochure (various)
- Cherry Keyboards and Switches Catalogue 1982 (Germany)
- Hirose Cherry Precision M83S, M83A, MD, MJ datasheet
Positions
1: Keymodule
| Value |
Meaning |
| M | Keymodule |
2: Series
| Value |
Meaning |
| 8 | Cherry M8 |
| Value |
Design |
Material |
Rating |
| 1 |
 |
AuAg 26 Ni 3 (71% gold, 26% silver, 3% nickel) |
100 mA/28 V |
| 2 |
|
AgPd 30 (70% silver, 30% palladium) |
100 mA/60 V |
| 3 |
|
Au 69 Ag 25 Pt 6 (69% gold, 25% silver, 6% platinum) |
100 mA/28 V |
| 4 |
 |
AuAg 10, 3 µm (90% gold, 10% silver) |
10 mA max./12 V max. |
4: Switch characteristics
| Value |
Configuration |
Shell |
Linear force |
Tactile force |
Notes |
| A |
SPST NO |
Uncovered |
70±15 cN (1982) or 70±20 cN |
105±30 cN |
|
| B |
SPST NC |
Uncovered |
85±20 cN |
N/A |
|
| C |
DPST NO |
Uncovered |
95±35 cN |
90±35 cN |
|
| D |
DPST NO/NC |
Uncovered |
85±35 cN |
N/A |
|
| E |
SPST NO |
Covered |
70±15 cN (1982) or 70±20 cN |
105±30 cN |
|
| F |
DPST NO |
Covered |
95±30 cN |
90±30 cN |
|
| G |
SPST NO |
Uncovered |
95±30 cN |
N/A |
For space bars |
| H |
SPST NO |
Covered |
95±30 cN |
N/A |
For space bars |
| I |
DPST NC |
Uncovered |
? |
? |
No forces are ever given |
| S |
|
|
|
|
1.5 mm travel (Hirose M83) |
5: Force and behaviour
| Value |
|
| 0 |
Linear |
| 1 |
Tactile |
| 4 |
Tactile feedback in compliance with West German Postal Service specifications |
6: Keystem
Outline drawings indicate designs that have not been seen but approximate or unclear details exist in catalogues.
| Value |
Diagram |
Keystem |
Applies to |
| 1 |
 |
6 mm, 0° |
Uncovered |
| 2 |
Not seen |
12 mm, 0° |
Uncovered |
| 3 |
 |
6 mm, 0° |
Uncovered |
| 4 |
Not seen |
12 mm, 0° |
Uncovered |
| 5 |
 |
6 mm, 0° |
Covered |
| 6 |
 |
12 mm, 0° |
Covered |
| 7 |
 |
6 mm, 7° (not seen) |
Uncovered |
| G |
|
Unknown |
German custom |
| N |
|
Uncertain |
Used by Hirose M83; it is drawn as 8 mm but it is also labelled as 3.5 mm tall (per Hirose mount) instead of 3.6 mm tall (8 mm mount) |
7: Standard features
| Value |
Designation |
| 0 |
No LED (incorrectly given as “O” in the M8 brochure) |
| R |
Red LED |
| G |
Green LED |
| Y |
Yellow LED |
| S |
Super-bright red LED |
| Value |
Designation |
| 0 |
No keycap (incorrectly given as “O” in the M8 brochure) |
| R |
Red keycap |
| G |
Green keycap |
| Y |
Yellow keycap |
| B |
Blue keycap |
| U |
Grey keycap |
| W |
White keycap |
| S |
Black keycap |
See also