80221 datasheet(59/91 Pages) LSI

59 / 91 page

80220/80221

4-59

MD400159/E

AC TEST TIMING CONDITIONS

Unless otherwise noted, all test conditions are as follows:

1. T

A= 0 to +70°C

2. V

CC = 5V +/-5%

3. 25 MHz +/- 0.01%

4. REXT = 10K +/- 1%, no load

5. Input conditions:

All Inputs:

tr,tf<=10nS, 20-80%

6. Output Loading

TPO

±:

Same as Figure 11 or equivalent, 10pF

Open Drain Outputs:

1K Pullup, 50pF

All Other Digital Outputs:

25pF

7. Measurement Points:

TPO

±, TPI±:

0.0 V During Data,

±0.3V at start/end of packet

All other inputs and outputs:

1.5 Volts

25 Mhz INPUT / OUTPUT CLOCK TIMING CHARACTERISTICS

LIMIT

SYM

PARAMETER

MIN

TYP

MAX

UNIT

CONDITIONS

OSCIN Period

39.996

40.004

Clock Applied to OSCIN

OSCIN High Time

Clock Applied to OSCIN

OSCIN Low Time

Clock Applied to OSCIN

OSCIN to TX_CLK

100 Mbps

10 Mbps

Figure 16. 25 Mhz Output Timing

TX_CLK

(100 MB)

TX_CLK

(10 MB)

t 4

OSCIN

t 1

t 2

t 3

Refer to Figure 16 for Timing Diagram.

Delay

80221 Datasheet(PDF) 59 Page - LSI Computer Systems

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