CY28159 Datasheet, PDF (6/13 Pages) Cypress Semiconductor – Clock Generator for Serverworks Grand Champion Chipset Applications

CY28159
Buffer Characteristics
Current Mode CPU Clock Buffer Characteristics
The current mode output buffer detail and current reference
circuit details are contained elsewhere in this datasheet. The
following parameters are used to specify output buffer charac-
teristics:
1. Output impedance of the current mode buffer circuit - Ro
(see Figure 4)
2. Minimum and maximum required voltage operation range
of the circuit - Vop (see Figure 4).
3. Series resistance in the buffer circuit - Ros (see Figure 4)
4. .Current accuracy at given configuration into nominal test
load for given configuration
VDD3 (3.3V +/- 5%)
Ro
Ros
Iout
Vout = 1.2V max
Iout
0V
Figure 4.
1.2V
Vout
Table 6. Host Clock (HSCL) Buffer Characteristics
Characteristics
Ro
Ros
Vout
Minimum
3000 Ohms (recommended)
Unspecified
N/A
N/A
Unspecified
1.2 Volt
Maximum
Iout is selectable depending on implementation. The parame-
ters above supply to all configurations. Vout is the voltage at
the pin of the device.
The various output current configurations are shown in the
host swing select functions table. For all configurations, the
deviation from the expected output current is ±7% as shown in
the table current accuracy.
Document #: 38-07118 Rev. **
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