CY28159PVC datasheet(6/13 Pages) CYPRESS

6 / 13 page

CY28159

Document #: 38-07118 Rev. **

Page 6 of 13

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 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.

1.2V

Iout

Ros

VDD3 (3.3V +/- 5%)

Vout = 1.2V max

Vout

Figure 4.

Table 6. Host Clock (HSCL) Buffer Characteristics

Characteristics

Minimum

Maximum

3000 Ohms (recommended)

N/A

Ros

Unspecified

Vout

N/A

1.2 Volt

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