Keymodule
Cherry GmbH
Cherrystrasse
D-91275 Auerbach/Opf.
Phone: (0 96 43) 18 - 0
Hotline: (0 96 43) 18 - 2 06
Fax: (0 96 43) 18 - 15 45
Internet: www.cherry.de
800407
The manufacturer accepts
no liability for errors or
changes in specification.
Printed in Germany.
45392530
E, Juni 2002
3, Mn
2002 Cherry GmbH
Contents
Technical Data
Model ML Model MX
General Information ________________________________________2
Electrical Characteristics
Technical Data ______________________________________________3 Switching voltage 12 V AC/DC 12 V AC/DC max, 2 V DC min
Switching current 10 mA AC/DC max, 10 uA DC min. 10 mA AC/DC max, 10uA DC min.
Contact resistance 200 mW (typically. 25 m) 200 mW (typically 25 m)
Capacity at 1kHz pF pF
Keymodule ML ______________________________________________4
Dielectric strength 500 V/50Hz 500 V/50Hz
Isolation resistance (new) 100 M 100 M
6
Durability at 5V, 1mA linear 50x10 linear
Keymodule MX ______________________________________________6
Durability at 5V, 1mA
6 6
pressure point 20x10 50x10 pressure point
Service life at 5V,
6
1mA latched pushbutton 0,5x10 latched pushbutton
6
MCBF 1x10
Mechanical Characteristics
Number of contacts Single-gap make contact element Single-gap make contact element
Action Pressure point Linear, pressure point, latching
Actuator travel 3.0 -0.5 mm 4.0 -0.4 mm Pulse / 4.2 0.3 mm latching
Pre-travel 1.5 0.5 mm 2 0.6 mm Pulse / 1.4 0.4 mm latching
Initial force 30 cN min 40 cN
Actuation force 45 20 cN 60 +20 cN linear and latching;
45 20 cN pressure point
Pressure point force 50 20 cN 55 20 cN
Bounce time during actuation with 0.4 m/s 5 ms 5 ms
Standard lead spacing 19.05 mm (16 mm min) 19.05 mm (16 mm min)
Keymodule
Fastening Fixing pins in the printed circuit board Snap fastening in frame or
Fixing pins in the printed circuit board
Cherry key modules are mechanical
Lighting (optional) LED in red, green or yellow
input elements with a single-gap
Decoupling diode optional
make contact element. Low assembly
Wire jumper optional
height, pleasant feel and excellent
contact reliability thanks to Gold-
Crosspoint contact technology allow
Materials
flexible designing of low-cost keypads
Insulation materials Thermoplastics (min UL 94 HB) Thermoplastics UL listed
and keyboards. Depending on the
Spring Stainless steel Stainless steel
key cap, different lead spacings are
Contacts AuAg 10 High-quality gold alloy
also possible.
Other Characteristics
Very short bounce times, very
pleasant feel and exceptionally high
Protection class IP 40 IP 40
reliability and durability pave the way
Operating temperature -10 C to +70 C -10 C to +70 C
for a wide range of applications.
Storage temperature -40 C to +70 C -40 C to +70 C
Humidity (without condensation) 5% to 95% 5% to 95%
Soldering capability DIN IEC 68 DIN IEC 68
Soldering temperature/duration 260 C / 5s 260 C / 5s
2 3