Cypress Semiconductor CY8C24894 Spezifikationen PDF herunterladen (Seite 32)

CY8C24894

Document Number: 001-53754 Rev. *F Page 32 of 50

AC External Clock Specifications

Tab le 23 list guaranteed maximum and minimum specifications for the voltage and temperature ranges: 4.75 V to 5.25 V and –40 °C

 T

 85 °C, or 3.0 V to 3.6 V and –40 °C  T

 85 °C, respectively. Typical parameters apply to 5 V and 3.3 V at 25 °C and are for

design guidance only.

AC Analog Output Buffer Specifications

Tab le 24 and Table 25 on page 33 list the guaranteed maximum and minimum specifications for the voltage and temperature ranges:

4.75 V to 5.25 V and –40 °C  T

 85 °C, or 3.0 V to 3.6 V and –40 °C  T

 85 °C, respectively. Typical parameters apply to 5 V

and 3.3 V at 25 °C and are for design guidance only.

Receiver Input clock frequency The baud rate is equal to the input

clock frequency divided by 8.

 4.75 V, 2 stop bits – – 49.92

[17]

MHz

 4.75 V, 1 stop bit – – 25.92

[17]

MHz

< 4.75 V – – 25.92

[17]

MHz

Table 22. AC Digital Block Specifications (continued)

Function Description Min Typ Max Units Notes

Table 23. AC External Clock Specifications

Symbol Description Min Typ Max Units Notes

OSCEXT

Frequency 0 – 24.24 MHz

– High period 20.5

– –ns

– Low period 20.5 – –ns

– Power-up IMO to switch 150

– – s

Table 24. 5-V AC Analog Output Buffer Specifications

Symbol Description Min Typ Max Units Notes

ROB

Rising settling time to 0.1%, 1 V step, 100pF load

Power = low

Power = high

–

2.5

s

SOB

Falling settling time to 0.1%, 1 V step, 100pF load

Power = low

Power = high

–

2.2

s

ROB

Rising slew rate (20% to 80%), 1 V step, 100 pF load

Power = low

Power = high

0.65

–

V/s

FOB

Falling slew rate (80% to 20%), 1 V step, 100 pF load

Power = low

Power = high

0.65

–

V/s

OBSS

Small signal bandwidth, 20 mV

, 3 dB BW, 100 pF load

Power = low

Power = high

0.8

–

MHz

OBLS

Large signal bandwidth, 1 V

, 3 dB BW, 100 pF load

Power = low

Power = high

300

–

kHz

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 49 50

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