PC87322VF datasheet(65/84 Pages) NSC

65 / 84 page

90 Device Description (Continued)

92 AC ELECTRICAL CHARACTERISTICS

921 AC Test Conditions

TA e 0 Cto70 C VDD e 50V g 10%

Input Pulse Levels

Ground to 3V

Input Rise and Fall Times

6 ns

Input and Output Reference Levels

123V

TRI-STATE Reference Levels

Active High b05V

Active Low a05V

LOAD CIRCUIT

(Notes 1 2 3)

TLC11870 – 27

Note 1

CL e 100 pF includes jig and scope capacitance

Note 2

S1 e Open for push-pull outputs S1 e VDD for high impedance to

active low and active low to high impedance measurements S1 e GND for

high impedance to active high and active high to high impedance measure-

ments RL e 10 kX for mP interface pins

Note 3

For the FDC Open Drive Interface Pins S1 e VDD and RL e 150X

AC TESTING INPUT OUTPUT WAVEFORM

TLC11870 – 28

922 Clock Timing

Symbol

Parameter

Min

Max

Units

tCH

Clock High Pulse Width

tCL

Clock Low Pulse Width

tCP

Clock Period

tICP

Internal Clock Period (Table 9-1)

tDRP

Data Rate Period (Table 9-1)

TABLE 9-1 Nominal tICP tDRP Values

MFM Data Rate

tDRP

tICP

Value

Units

1 Mbs

1000

3 c tCP

125

500 kbs

2000

3 c tCP

125

300 kbs

3333

5 c tCP

208

250 kbs

4000

6 c tCP

250

TLC11870 – 29

FIGURE 9-1 Clock Timing

PC87322VF Datasheet(PDF) 65 Page - National Semiconductor (TI)

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