© Semiconductor Components Industries, LLC, 2004

June, 2004 − Rev. 8

1

Publication Order Number:

CS4121/D

CS4121

Low Voltage Precision

Air−Core Tach/Speedo

Driver

The CS4121 is specifically designed for use with air−core 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 air−core 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

ABSOLUTE MAXIMUM RATINGS

Rating

Value

Unit

< 100 ms Pulse Transient

Continuous

60

24

V

V

−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

°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 Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

DIP−16

NF SUFFIX

CASE 648

1

16

SO−20L

DWF SUFFIX

CASE 751D

1

20

http://onsemi.com

Device

Package

ORDERING INFORMATION

CS4121EDWF20

SO−20L

37 Units/Rail

CS4121EDWF20G

SO−20L

(Pb−Free)

37 Units/Rail

CS4121EDWFR20

SO−20L

1000 Tape&Reel

CS4121ENF16

DIP−16

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