Le79555
Data Sheet
Figure 9. Le79555 Engineering Test Circuit
VCC
+5 V
DA
DB
DA
DB
VCC
RD
Le79555
RD
35.4 k
Ω
CAX
VTX
RSN
RDC
VTX
2.2 nF
A (TIP)
A (TIP)
HPA
R
150 kTΩ
RRX
CHP
VRX
220 nF
150 k
Ω
HPB
RDC2
13.02 k
B (RING)
B (RING)
Ω
RDC1
13.02 k
VDC
CBX
2.2 nF
Ω
CDC
220 nF
RINGOUT
VDC
RINGOUT
RYOUT1
RYOUT1
RYOUT2
AGND
RYOUT2
BATTERY
GROUND
D2
D1
C3
C2
C1
D2
BGND
D1
C3
C2
C1
N/C
RSVD
QBAT
DET
ANALOG
GROUND
DET
CAS
CQB
330 nF
CCAS
330 nF
VBAT
CHS
BAT
52 V
DVBH
CV1
-
0.47 µF
IN400x
CHCLK
CHCLK
256 kHz
CCH1
CCH2
15 nF
560 pF
RCH
1.3 k
Ω
VREG
CFIL
0.47 µF
L1
1mH
Low ESR
L
DCHCLK1
MUR120
16
Zarlink Semiconductor Inc.
ZARLINK [ ZARLINK SEMICONDUCTOR INC ]
