BU21050FS-E2 Rohm Semiconductor, BU21050FS-E2 Datasheet - Page 5

• Manufacturer Part Number: BU21050FS-E2
• Description: IC CAP SENSOR SWITCH 8CH 32-SSOP
• Manufacturer: Rohm Semiconductor
• Type: Capacitive Switchr

Specifications of BU21050FS-E2

• Package / Case: 32-SSOP
• Input Type: Logic
• Output Type: Logic
• Interface: Port
• Current - Supply: 550µA
• Mounting Type: Surface Mount
• Supply Current: 550µA
• Supply Voltage Range: 4.5V To 5.5V
• Sensor Case Style: SSOP
• No. Of Pins: 32
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (18-Jun-2010)
• Base: RoHS Compliant
• Supply Voltage: 5 V
• Dimensions: 13.6 mm L x 7.8 mm W x 1.8 mm H
• Power Dissipation: 760 mW
• Temperature Range: - 55 C to + 125 C
• Termination Style: SMD/SMT
• Base Number: 21050
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: BU21050FS-E2TR

●I/O Circuit
© 2009 ROHM Co., Ltd. All rights reserved.
BU21050FS
www.rohm.com
【IFSEL: Output interface format】
【INSEL : Simultaneous push judgment control】
【THON: Button OFF→ON threshold value judge】
【THOFF: Button ON→OFF threshold value judge】
【GAIN Selection】
INSEL
INSEL = H : 8GPIOs output mode
Initial status PO[8:1] = Hi-Z
INSEL = L : 4bit Binary output mode
Initial Status PO[4:1] = L
Only the first sensor input was effective in terms of button ON judgment when more than one input has occurred.
Next judgment would be done after all the button is OFF.
This setting is effective when IFSEL = “H”
Setting the threshold value of electrostatic Sensor Switches. By applying voltages can be set.
As an example, 1/2VDD applied to the entire range of the sensor output 1 / 2 to set the threshold value.
In fact, the voltage setting resistance to the partial pressure is recommended to us.
Sensor gain can be set in 4 stages
GAIN[1:0] = 00 (x92)
GAIN[1:0] = 01 (x69)
GAIN[1:0] = 10 (x46)
GAIN[1:0] = 11 (x1)
CIN
H
L
①CMOS INPUT
Button OFF
Simultaneous push banned
Simultaneous push effective
Button
SIN1
SIN2
SIN3
SIN4
SIN5
SIN6
SIN7
SIN8
IFSEL
H
L
Function
PAD
OEN
Only the dominant button will outputwhen more than 2 buttons were pressed
Every button that was pressed will output
I
②CMOS 3state output
PO[4:1]
0000
0001
0010
0100
0101
1000
0011
0110
0111
4bit Binary
8ch PIO
5/7
Mode
PAD
Note
③CMOS 3state output with analog switch
ASW
AIN
L-active, Nch Open Drain
Output format
H-active, L
Technical Note
2009.04 - Rev.B
PAD