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A2639B Schematic ( PDF Datasheet ) - APEXONE

Teilenummer A2639B
Beschreibung USB+PS/2 Optical Mouse Sensor SOC
Hersteller APEXONE
Logo APEXONE Logo 




Gesamt 15 Seiten
A2639B Datasheet, Funktion
A2639B
USB+PS/2 Optical Mouse Sensor SOC
CONTENTS
1. DESCRIPTION ........................................................................................................................................................ 2
1.1 FEATURES ........................................................................................................................................................... 2
2. BLOCK DIAGRAM................................................................................................................................................. 3
3. PIN ASSIGNMENT ................................................................................................................................................. 3
4. PIN DESCRIPTION ................................................................................................................................................ 4
5. FUNCTION DEFINITION...................................................................................................................................... 4
5.1 USB & PS/2 PLUG AND PLAY FUNCTION ............................................................................................................ 4
5.1.1. Power-On-Reset function........................................................................................................................... 4
5.1.2. Power-down-set function ........................................................................................................................... 4
5.2 DE-BOUNCE CIRCUITS ......................................................................................................................................... 4
5.3 BUILT-IN REGULATORS ........................................................................................................................................ 5
5.4 NO CRYSTAL FUNCTION...................................................................................................................................... 6
5.5 EXTERNAL OPTION FOR USB-ONLY OR USB/PS2 IN A2639B ............................................................................. 6
5.6 SUSPEND FUNCTION ............................................................................................................................................ 6
5.6.1. Suspend mode definition ............................................................................................................................ 6
6. ELECTRICAL CHARACTERISTICS .................................................................................................................. 6
6.1 ABSOLUTE MAXIMUM RATINGS.......................................................................................................................... 6
6.2 RECOMMENDED OPERATING CONDITIONS .......................................................................................................... 7
6.3 AC ELECTRICAL SPECIFICATIONS ....................................................................................................................... 7
6.4 USB ELECTRICAL SPECIFICATIONS ..................................................................................................................... 7
6.5 USB TIMING SPECIFICATIONS............................................................................................................................. 8
6.6 DC ELECTRICAL SPECIFICATIONS ..................................................................................................................... 10
7. TYPICAL PERFORMANCE CHARACTERISTICS ........................................................................................ 11
8. TYPICAL APPLICATION (Z AXIS IS MECHANICAL).................................................................................. 12
9. PCB ASSEMBLY.................................................................................................................................................... 13
10. PACKAGE AND ASSEMBLY .......................................................................................................................... 14
Rev1.0
Page 1
5/11/2011






A2639B Datasheet, Funktion
A2639B
USB+PS/2 Optical Mouse Sensor SOC
5.4 No Crystal Function
A2639B needs no external crystal or ceramic oscillator and no clock pins. It uses an internal oscillator with
accuracy to guarantee the USB1.1 1.5M compatibility. Compared with previous products, the USB no crystal
function is optimized. These techniques are the guarantee to completely pass USB-IF test.
5.5 External option for USB-only or USB/PS2 in A2639B
In default, A2639B supports USB and PS2 interfaces; A2639B also supports USB-only interface by external
option configuration. The option is set to USB-only by a pull-down resistor of 510K(±5%) in pin M.
5.6 Suspend function
A2639B support the suspend mode defined by USB specification. The total suspend current of the whole mouse
system is within 470µA.
5.6.1. Suspend mode definition
Condition of suspend
A2639B will begin to shift to suspend mode when the USB is idle for 3ms. The whole mouse system will been to
suspend mode within 10ms from the last bus activity.
Suspend status
When A2639B is in suspend mode, the recovery block will monitor the L/R/M buttons. If any button is pressed, it
will wake up the whole system, by sending resume signal to USB bus. During suspend mode, A2639B will close
the clock oscillator. The function of PAD Z will also be turned off to save the power consumption.
Suspend current
The suspend current of A2639B is typically 200µA. After summing up the pull-up resistor for D- of 200µA, the
whole mouse system’s suspend current can be limited to 470µA.
Resumed by host
A2639B can resumed from suspend mode by USB host. The resume signal is defined by USB specification as
20ms state “K” and one EOP followed.
Remote wakeup
A2639B can also resumed from suspend mode by L/M/R button pressing. Any button pressing will cause A2639B
send a state “K” to USB bus for at lease 5ms no more than 15ms. Then USB host will send 20ms state “K” and
one EOP followed. Then the system wake up. This flow called remote wakeup.
6. Electrical Characteristics
6.1 Absolute Maximum Ratings
Typical values at 25 °C, VDD=5.0 V,
Parameter
Symbol Mini
mum
Storage Temperature
Operating Temperature
Lead Solder Temp
TSTG
TOPR
-40
-15
Supply Voltage
ESD
VCC -0.3
Rev1.0
Maximum Units Notes
85
55
260
5.5 V
2 kV
Page 6
For 10 seconds, 1.6mm below seating plane.
All pins, human body model MIL 883 Method 3015
5/11/2011

6 Page









A2639B pdf, datenblatt
A2639B
USB+PS/2 Optical Mouse Sensor SOC
8. Typical Application (Z axis is mechanical)
8.1Application circuit
Fig. 8-1 Typical application of A2639B USB+PS2 interface
Rev1.0
Page 12
5/11/2011

12 Page





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