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| CY28159 |
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 SPECTRALINEAR
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6 page 
CY28159 Rev 1.0, November 24, 2006 Page 6 of 12 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 Iout is selectable depending on implementation. The param- eters 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. 1.2V 0V Iout Iout Ros Ro VDD3 (3.3V +/- 5%) Vout = 1.2V max Vout Figure 4. Table 7. Host Clock (HSCL) Buffer Characteristics Characteristics Minimum Maximum Ro 3000 Ohms (recommended) N/A Ros Unspecified Unspecified Vout N/A 1.2 Volt |
