ISD1112SR Nuvoton Technology Corporation of America, ISD1112SR Datasheet - Page 25

• Manufacturer Part Number: ISD1112SR
• Description: IC VOICE REC/PLAY 12-SEC 28-SOIC
• Manufacturer: Nuvoton Technology Corporation of America
• Series: ISD1100r

Specifications of ISD1112SR

• Interface: Pushbutton
• Filter Pass Band: 2.2kHz
• Duration: 12 Sec
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (0.300", 7.50mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

ISD1100 SERIES
Applications Note
Some users may experience an unexpected recording taking place when their circuit is powered up,
or the batteries are changed, and V
rises faster than REC . This undesired recording prevents
CC
playback of the previously recorded message. A spurious EOM marker appears at the very beginning
of the memory, preventing access to the original message, and nothing is played.
To prevent this occurrence, install a capacitor (approx. 0.001 µF) between the REC and V
pins.
CC
This pulls the control pin voltage up with V
as it rises. Once the voltage is HIGH, the pull-up device
CC
will keep the pin HIGH until intentionally pulled LOW, preventing the false EOM marker.
Since this condition is dependent upon factors such as the capacitance of the user’s printed circuit
board, not all circuit designs will exhibit the spurious marker. It is recommended, however, that the
capacitor is included for design reliability. A more detailed explanation and resolution of this
occurrence is described in Application Information.
Publication Release Date: April 21, 2005
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Revision 1.1