BU8874 Rohm Semiconductor, BU8874 Datasheet - Page 7
BU8874
Manufacturer Part Number
BU8874
Description
IC DTMF RECEIVER FOR PHONE DIP8
Manufacturer
Rohm Semiconductor
Datasheet
1.BU8874.pdf
(10 pages)
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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
BU8874
Manufacturer:
ROHM
Quantity:
5 510
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