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ICD-B7
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Common Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
1
/
W or less unless otherwise
4
specified.
•
: internal component.
f
• C : panel designation.
• A : B+ Line.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PB
(
) : REC
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
a
: REC
Common Note on Printed Wiring Boards:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
: internal component.
f
•
: Pattern from the side which enables seeing.
Caution:
Pattern face side:
Parts on the pattern face side seen from
(SIDE B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(SIDE A)
the parts face are indicated.
• Lead Layouts
Lead layout of conventional IC
• Waveforms
1
0.5V/div 0.1µsec/div
1.0Vp-p
4.02MHz
IC101
ta
(XOUT)
1.0V/div 10µsec/div
2
2.2Vp-p
32.768kHz
IC704
1
(32KOUT)
3
0.5V/div 10µsec/div
1.2Vp-p
32.768kHz
8
IC704
(OSCOUT)
1.0V/div 0.2µsec/div
4
3.2Vp-p
5MHz
IC703
ul
(X2)
14
3-7. IC BLOCK DIAGRAMS
IC103 LM4890MMX
SHUTDOWN
1
8
VO2
BIAS
BYPASS
2
7
GND
6
VDD
+IN
3
5
VO1
-IN
4
IC704 RS5C348A-E2
32 kHz
32KOUT
1
OUTPUT
COMPARATOR
CONTROL
COMPARATOR
SCLK
2
ADDRESS
REGISTER
SO
3
I/O
CONTROL
SHIFT
SI
4
REGISTER
VSS
5
14
ALARM W REGISTER
VDD
(WEEK, MIN, HOUR)
W
ALARM D REGISTER
10
VDD
(MIN, HOUR)
D
TIMER COUNTER
9
OSCIN
DIVIDER
SEC, MIN, HOUR, WEEK,
DIV
OSC
CORRECTION
8
DAY, MONTH, YEAR
OSCOUT
ADDRESS
DECODER
INTERRUPT
CONTROL
OSC
DETECT
VOLTAGE
DETECT
7
CE
6
INTR
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