Search

Features:

• Operating voltage: 3V to 5.5V
• Up to 40MHz count frequency
• Dual Mode-registers for functional programmability
• Dual 32-bit comparators
• Dual 32-bit Input Data registers for dual target counts
• 32-bit latch for counter upload
• Dual Status registers for dynamic and freeze-frame status
• Quadrature A, B and Z inputs with digital filters
• Programmable quadrature or non-quadrature input modes
• 8-bit, 16-bit, 24-bit or 32-bit programmable configurations
• Up to 400 KHz I2C clock speed
• 3 selectable address pins for up to 8 devices on the bus
• Write-All addressing mode for writing to all devices simultaneously
• 14-pin SOIC and TSSOP packages

Description:

LS7866 is a monolithic CMOS 32-bit counter, programmable to operate in 8-bit, 16-bit, 24-bit or 32-bit modular structures. Inputs are provided to interface directly with the quadrature clocks and the index markers from incremental encoders. The programmable modes include: X1/X2/X4 quadrature or bidirectional non-quadrature. Either of these modes can further be combined with Free-Run, Non-Recycle, Mod-N and Range-Limit modes. The functional modes are programmed via two control registers: MCR0 and MCR1. An I2 C standard serial bus in 7-bit address format is provided for communicating with the LS7866.
Code
Package
Notes

P/N

RoHS Compliant Standard plastic DIP

1, 2, 3

P/N – S

RoHS Compliant Standard SOIC

1, 2, 3, 4

P/N – SW

RoHS Compliant Widebody SOIC option

1, 2, 3, 4

P/N – S14

RoHS Compliant 14-pin SOIC version of 8-pin part

1, 2, 3, 4

P/N – TS

RoHS Compliant TSSOP

1, 2, 3, 4

P/N – TS24

RoHS Compliant 24-pin TSSOP version of 20-pin part

1, 2, 3, 4

Example: LSxxxx-TS = the LSxxxx in the RoHS Compliant TSSOP package-type

Note 1: See Table for package body widths

Note 2: Package outline drawings conform to JEDEC standards

Note 3: Packages shipped in anti-static tubes

Note 4: Tape and Reel option available. Contact factory for details

ADDITIONAL ORDERING OPTIONS:

Probed Wafers (P/N-PW), Waffle Packed Die (P/N-WP)

Package Body Widths
# of Pins
P/N, -C, -CM
mils
-S
mils
-SW
mils
-TS
mils

8

300

150

14

300

150

173

16

300

150

300

173

18

300

300

20

300

300

173

24

600

300

173

28

600

300

173

38

173

40

600

48

240