BU8874 Rohm Semiconductor, BU8874 Datasheet - Page 7

• Manufacturer Part Number: BU8874
• Description: IC DTMF RECEIVER FOR PHONE DIP8
• Manufacturer: Rohm Semiconductor

Specifications of BU8874

• Function: Receiver, DTMF
• Number Of Circuits: 1
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 2.2mA
• Power (watts): 500mW
• Operating Temperature: -10°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Includes: Power Down Mode
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -

FApplication example
FSelecting attachment components
(1) Power supply components
(2) Oscillation components
X501 : Use a crystal or ceramic resonator with an os-
208
Communication ICs
cillation frequency of 4.194304MHz. If using a
ceramic resonator, there may be problems with
the precision of the oscillation frequency, so we
recommend using one of the ceramic resona-
tors listed below.
C502 : This is the V
JP501 : This is normally shorted. To test the current con-
C591 : If you are using a dedicated resonator X501de-
100 F.
sumption of the IC (at the point where the power
down mode is entered), insert a DC ammeter in
place of JP501.
signed for DTMF receivers, capacitor C591
should be left open. If you are injecting an exter-
nal clock, X501 should be omitted and DC
blocking capacitor C591 used in its place. Typi-
cally, this capacitor should be 47 nF.
DD
bypass capacitor, and is normally
BU8874 / BU8874F