VT5365

Design notes

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2.4

Reference design - bill of materials

For complete reference design schematics for both single battery and batteries in series

designs, please refer to the STV-365-R0X user manuals.

Table 3.

Bill of materials: main components

Ref.

Description

Manufacturer

Part Number

U1

Optical mouse sensor

STMicroelectronics

VT5365V032

Q1

BSS138 N-channel MOSFET, SOT23 Farnell

518-621

Q2

NPN transistor to drive D1

Standard component - many supplier

D2

SMD power Schottky diode,

STPS340U SMB

Farnell

935-207

L1

15 µH surface mount inductor

DO1608 series

CoilCraft

D1

Navigation LED

See Section 6: LED selection on page 21

X1

12 MHz low profile HS49 Xtal

TXC

SW1 - SW6

Sealed keyswitch (SMD) B3S1000,

ID button

Standard component - many supplier

SW7

Z-wheel

Dicgu HK

Electronics

EN028D-11PS1-30-

R

R1- R6

100K resistor

Standard component - many suppliers

R9

Controls max current through LED

Standard component - many suppliers

R12

560K resistor

Standard component - many suppliers

R7,R8,R13

470K resistor

Standard component - many suppliers

C6,C7

22 pF capacitor

Standard component - many suppliers

C1

680 pF capacitor

Standard component - many suppliers

C2,C5,C9

100 nF capacitor

Standard component - many suppliers

C3,C4,C8

10 µF tantalum capacitor

Standard component - many suppliers

Only required if EEPROM is fitted

U2

256 or 4 KByte EEPROM

STMicroelectronics

R10,R11

1K2 resistor

Standard component - many suppliers

Additional items not mounted on the PCB

Optics assembly

See Section 5: Optics assembly on page 18

Aperture stop

See Section 5: Optics assembly on page 18