PSB7280 Datasheet, PDF (179/190 Pages) Siemens Semiconductor Group – Joint Audio Decoder-Encoder

PSB 7280
7.6
XTAL 1,2 Recommended Typical Crystal Parameters
Table 23
Parameter
Symbol
Limit Values
Unit
Motional capacitance
C₁
Shunt
C₀
Load
C_L
Resonance resistance
R_r
17
5
≤ 23/42 ¹⁾
recommended 50/80 ¹⁾
fF
pF
pF
Ohm
1) _{First value for 7.68 MHz crystal (using internal PLL), second value for 34.56 MHz crystal (using bypass mode).}
Note: The 34.56 MHz crystal must be of the fundamental type.
7.7
AC Characteristics
7.7.1 Testing Waveform
Conditions as above (Recommended Operating Conditions) at T_A = 0 to 70 °C.
Inputs are driven to 2.4 V for a logical “1” and to 0.4 V for a logical “0”. Timing
measurements are made at 2.0 V for a logical “1” and 0.8 V for a logical “0”. The AC
testing input/output waveforms are shown in Figure 55.
Figure 55
Semiconductor Group
179
Data Sheet 1998-07-01