BU21051FS-E2 Rohm Semiconductor, BU21051FS-E2 Datasheet - Page 4

• Manufacturer Part Number: BU21051FS-E2
• Description: IC CAP SENSOR SWITCH 8CH 16-SSOP
• Manufacturer: Rohm Semiconductor
• Type: Capacitive Switchr

Specifications of BU21051FS-E2

• Input Type: Logic
• Output Type: Logic
• Interface: Port
• Current - Supply: 500µA
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Supply Voltage: 5 V
• Number Of Channels: 2
• Dimensions: 6.6 mm L x 6.2 mm W x 1.5 mm H
• Output Voltage: 5.5 V
• Power Dissipation: 500 mW
• Temperature Range: - 55 C to + 125 C
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: BU21051FS-E2TR

●Pin Description
●I/O Circuit
© 2009 ROHM Co., Ltd. All rights reserved.
BU21051FS
www.rohm.com
【THON: Button OFF→ON threshold value judge】
【THOFF: Button ON→OFF threshold value judge】
【GAIN Selection】
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)
Pin
No
10
12
13
14
15 GAIN[0]
16 GAIN[1]
11
※*1 Initial State
1
2
3
4
5
6
7
8
9
CIN
FILTER
THOFF
DVDD Power Digital part Power supply Digital part Power supply
THON
AVDD
Name
SREF
GND Ground Ground
SIN1
SIN2
SDN
N.C.
TST
PO2
PO1
①CMOS input
Power Analog part Power supply
AIn
AIn
AIn
Out
Out
AIn
AIn
① When internal organs power-on reset is effective
② When SDN = “L”
I/O
In
In
In
In
In
-
Standard capacitor input
Sensor input1
No connect
Sensor input 2
Sensor ON threshold
voltage input
Sensor OFF threshold
voltage input
Test input
Shutdown input
Switch output 2
Switch output 1
Filter selection
Gain level selection
PAD
Function
OEN
I
②CMOS 3state output
Usually tide to “L”
“H” : state of operation
“L” : halt condition
Sensor pin2
Sensor pin1
“H”: Filter effect: strong
“L”: Filter effect: Weak
GAIN[1:0] = 00 : Strong
GAIN[1:0] = 01 :
GAIN[1:0] = 10 :
GAIN[1:0] = 11 : Week
4/6
On → “L”, Off → “Hi-Z” DVDD
On → “L”, Off → “Hi-Z” DVDD
Notes
-
-
-
-
-
-
-
-
PAD
Gain
③CMOS 3state output with analog switch
ASW
AIN
Supply
referen
DVDD
DVDD
DVDD
DVDD
DVDD
AVDD
AVDD
AVDD
AVDD
AVDD
ce
-
-
-
-
Reset level
“Hi-Z”
“Hi-Z”
“Hi-Z”
“Hi-Z”
“Hi-Z”
“Hi-Z”
“Hi-Z”
Technical Note
2009.04 - Rev.B
-
-
※
1
PAD
Pad
I/O
③
③
③
③
③
①
①
②
②
①
①
①
-