BU2090FS-E2 Rohm Semiconductor, BU2090FS-E2 Datasheet - Page 6

• Manufacturer Part Number: BU2090FS-E2
• Description: IC DRVR SER/PAR I/O 12B SSOP-A16
• Manufacturer: Rohm Semiconductor
• Type: Driverr

Specifications of BU2090FS-E2

• Voltage - Supply: 2.7 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: 16-SSOP
• Output Current: 25mA
• No. Of Outputs: 12
• Supply Voltage Range: 2.7V To 5.5V
• Driver Case Style: SSOP
• No. Of Pins: 16
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (18-Jun-2010)
• Base: RoHS Compliant
• Supply Current: 5 uA to 3 uA
• Maximum Operating Temperature: 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Output Voltage: 5.5 V to 25 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Drivers/receivers: -
• Protocol: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: BU2090FS-E2; BU2090FS-E2TR

●Function
○Start condition
○Stop condition
○Acknowledge
The start condition is a “HIGH” to “LOW” transition of the SDA line while SCL is “HIGH”.
The stop condition is a “LOW” to “HIGH” transition of the SDA line while SCL is “HIGH”.
The master (μp) puts a resistive “HIGH” level on the SDA line during the acknowledge clock pulse. The peripheral
(audio processor) that acknowledge has to pull-down (“LOW”) the SDA line during the acknowledge clock pulse, so
that the SDA line is stable “LOW” during this clock pulse.
The slave which has been addressed has to generate an acknowledgement after the reception of each byte, otherwise
the SDA line remains at the “HIGH” level during the ninth clock pulse time. In this case the master transmitter can
generate the STOP information in order to abort the transfer.
SDA
SCL
(from master)
(from master)
(from slave)
SDA
SDA
SCL
condition
Start
S
S
1
Fig.2 Start / Stop condition
Fig.3 Acknowledge
6/12
not confirm
8
confirm
condition
ACK signal
9
Stop
P
clock for acknowledge