TRAC-S2Q16 Diodes Zetex, TRAC-S2Q16 Datasheet - Page 6

• Manufacturer Part Number: TRAC-S2Q16
• Description: TRAC SUPPORT DEVICE 16QSOP
• Manufacturer: Diodes Zetex

Specifications of TRAC-S2Q16

• Applications: *
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TRAC-S2
BLOCK DIAGRAM
Description of the TRAC Support Circuit
1) Rail Splitter
This section provides the analog ground rail between the 5V supply. An external potential divider
can be connected to the SETV pin which enables AGND_OUT to be set to the desired potential. The
output stage of the rail splitter has been designed to provide power capabilities for 4 TRAC devices
and accompanying circuitry. The circuit has low output resistance enabling a drive capability of +/-
20mA.
2) Supply Monitor
This section utilises the precision ZSM560 supply monitor design. The RESET_OUT provides a signal
to reset all the devices included in the programming and operation of TRAC . This ensures that all
devices are switched on and off simultaneously.
3) Programming Logic
This section provides TRAC and memory with the signals required for programming. The clock is
generated on chip, with the frequency set by an external capacitor. The DATA_OUT signal is generated
by dividing the clock frequency by 4. This provides the code to initialise an EEPROM and prompt it to
output data. The SELECT pin enables EEPROM chip select.
This section also takes an input signal from the final TRAC device, CLCR_IN. This signal is normally
‘high’ and goes ‘low’ when programming is complete, and is used to terminate the CLK_OUT and
DATA_OUT signals.
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