PC8477BVF-1 datasheet(39/54 Pages) NSC

Part #	PC8477BVF-1

Description	Advanced Floppy Disk Controller

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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39 / 54 page

60 Device Description (Continued)

DC Characteristics

Under Recommended Operating Conditions (Continued)

Symbol

Parameter

Conditions

Min

Typ

Max

Units

MICROPROCESSOR INTERFACE PINS

(D7 – D0 A2 – A0 CS RD WR INT DRQ DACK TC RESET)

VOH

Output High Voltage

IOH eb4 mA

30

V

VOL

Output Low Voltage

IOL e 12 mA

04

V

IOZ

Input TRI-STATE

VIN e VCC

10

m

A

Leakage Current

VIN e 0

b

10

m

A

(D7 – D0 INT DRQ)

DISK INTERFACE PINS

VH

Input Hysteresis

250

mV

VOH

Output High Voltage (Note 5)

IOH eb4 mA

30

V

VOL

Output Low Voltage

IOL e 48 mA

04

V

ILKG

Output High Leakage Current

VIN e VCC

10

m

A

(Note 6)

VIN e 0V

b

10

m

A

MISCELLANEOUS PINS

VOH

Output High Voltage

IOH eb4mA

30

V

(DRATE0 – 1 MFM)

VOL

Output Low Voltage

IOL e 6mA

04

V

(DRATE0 – 1)

VOL

Output Low Voltage (MFM)

IOL e 4 mA

04

V

Note 5

VOH for the disk interface pins is valid for CMOS buffered outputs only

Note 6

This parameter is valid for Open Drain output configuration only

62 PHASE LOCKED LOOP CHARACTERISTICS

Parameter

Symbol

Conditions

Min

Typ

Max

Units

Dynamic Window Margin

TDW

(Note)

68

73

%

Note

Dynamic window margin is tested at both VCC extremes with a repeating ‘‘DB6’’ pattern and 0% MSV 500 kbs 300 kbs 250 kbs and 1 Mbs are tested

at 68%

39

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PC8477BVF-1 Datasheet(PDF) 39 Page - National Semiconductor (TI)

PC8477BVF-1 Datasheet(HTML) 39 Page - National Semiconductor (TI)

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