UPSD3212C, UPSD3212CV
Figure 79. External Clock Cycle
Figure 80. Recommended Oscillator Circuits
Note: C1, C2 = 30pF ± 10pF for crystals
For ceramic resonators, contact resonator manufacturer
Oscillation circuit is designed to be used either with a ceramic resonator or crystal oscillator. Since each crystal and ceramic resonator
have their own characteristics, the user should consult the crystal manufacturer for appropriate values of external components.
Figure 81. PSD MODULE AC Measurement I/O
Waveform
Figure 82. PSD MODULEAC Measurement
Load Circuit
2.01 V
3.0V
195 Ω
Test Point
1.5V
Device
Under Test
0V
CL = 30 pF
(Including Scope and
AI03103b
Jig Capacitance)
AI03104b
Table 118. Capacitance
(1)
Symbol
Parameter
Test Condition
Max.
Unit
pF
Typ.
C
V
= 0V
= 0V
Input Capacitance (for input pins)
4
6
IN
IN
Output Capacitance (for input/
output pins)
pF
C
V
OUT
8
12
OUT
Note: Sampled only, not 100% tested.
1. Typical values are for T = 25°C and nominal supply voltages.
A
145/152
STMICROELECTRONICS [ ST ]
