C501 datasheet(45/48 Pages) INFINEON

45 / 48 page

Semiconductor Group

1997-04-01

C501

Figure 19

AC Testing: Input, Output Waveforms

Figure 20

AC Testing: Float Waveforms

Figure 21

Recommended Oscillator Circuits

0.45 V

0.2

-0.1

+0.9

0.2

Test Points

MCT00039

CC -0.5 V

AC Inputs during testing are driven at

CC – 0.5 V for a logic ‘1’ and 0.45 V for a logic ‘0’. Timing

measurements are made at

IHmin for a logic ‘1’ and VILmax for a logic ‘0’.

MCT00038

Load

-0.1 V

+0.1 V

Load

Timing Reference

Points

-0.1 V

+0.1 V

For timing purposes a port pin is no longer floating when a 100 mV change from load voltage

occurs and begins to float when a 100 mV change from the loaded

OH / VOL level occurs.

OL / IOH ≥ ± 20 mA.

MCS02452

XTAL1

XTAL2

XTAL1

Crystal Oscillator Mode

Driving from External Source

External Oscillator

Signal

N.C.

20 pF

3.5 - 40 MHz

C =

(incl. stray capacitance)

P-LCC-44/Pin 20

P-DIP-40/Pin 18

M-QFP-44/Pin 14

M-QFP-44/Pin 15

P-DIP-40/Pin 19

P-LCC-44/Pin 21

M-QFP-44/Pin 14

P-DIP-40/Pin 18

P-LCC-44/Pin 20

P-LCC-44/Pin 21

P-DIP-40/Pin 19

M-QFP-44/Pin 15

Note: During programming and verification of the C501-1E OTP memory

a clock signal of 4-6 MHz must be applied to the device.

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