Semiconductor Components Industries, LLC, 2004
June, 2004 Rev. 8
1
Publication Order Number:
CS4121/D
CS4121
Low Voltage Precision
AirCore Tach/Speedo
Driver
The CS4121 is specifically designed for use with aircore meter
movements. The IC provides all the functions necessary for an analog
tachometer or speedometer. The CS4121 takes a speed sensor input
and generates sine and cosine related output signals to differentially
drive an aircore meter.
Many enhancements have been added over industry standard
tachometer drivers such as the CS289 or LM1819. The output utilizes
differential drivers which eliminates the need for a Zener reference
and offers more torque. The device withstands 60 V transients which
decreases the protection circuitry required. The device is also more
precise than existing devices allowing for fewer trims and for use in a
speedometer.
The CS4121 is compatible with the CS8190, and provides higher
accuracy at a lower supply voltage (8.0 V min. as opposed to 8.5 V). It
is functionally operational to 6.5 V.
Features
PbFree Package is Available*
Direct Sensor Input
High Torque Output
Low Pointer Flutter
High Input Impedance
Overvoltage Protection
Accurate to 8.0 V Functional to 6.5 V (typ)
Internally Fused Leads in SO20 Package and DIP16
ABSOLUTE MAXIMUM RATINGS
Rating
Value
Unit
Supply Voltage, VCC
< 100 ms Pulse Transient
Continuous
60
24
V
Operating Temperature (TJ)
40 to +105
°C
Storage Temperature
40 to +165
°C
Junction Temperature
40 to +150
°C
ESD (Human Body Model)
4.0
kV
Lead Temperature Soldering:
Wave Solder (through hole styles only) (Note
1)Reflow: (SMD styles only) (Note
2)260 peak
230 peak
°C
Maximum ratings are those values beyond which device damage can occur.
Maximum ratings applied to the device are individual stress limit values (not
normal operating conditions) and are not valid simultaneously. If these limits
are exceeded, device functional operation is not implied, damage may occur
and reliability may be affected.
1. 10 seconds maximum.
2. 60 second maximum above 183
°C.
*For additional information on our PbFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
DIP16
NF SUFFIX
CASE 648
1
16
SO20L
DWF SUFFIX
CASE 751D
1
20
http://onsemi.com
Device
Package
Shipping
ORDERING INFORMATION
CS4121EDWF20
SO20L
37 Units/Rail
CS4121EDWF20G
SO20L
(PbFree)
37 Units/Rail
CS4121EDWFR20
SO20L
1000 Tape&Reel
CS4121ENF16
DIP16
25 Units/Rail
For information on tape and reel specifications,
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
See specific marking information and pin connection
information on page 4 of this data sheet.
DEVICE MARKING INFORMATION