50 Absolute Maximum Ratings

(Notes 1 and 2)

If MilitaryAerospace specified devices are required

please contact the National Semiconductor Sales

OfficeDistributors for availability and specifications

b

All Input and Output Voltages

b

b

750 mW

(Soldering 10 seconds)

260 C

06V

Operating Conditions

Min

Max

Units

45

55

V

a

70

C

ESD Rating is to be determined

Symbol

Parameter

Conditions

Min

Max

Units

High Level Input Voltage

(except OSC2CLK) (Note 5)

20

V

Low Level Input Voltage

(except OSC2CLK)

b

05

08

V

Input Current (except OSC pins)

g

10

m

A

10

mA

(Note 4)

400

m

A

in Low Power Mode

(Note 4)

Supply Current

35

mA

950

m

A

in Low Power Mode

(Note 4)

OSCILLATOR PINS

(OSC2CLK)

OSC2 Input Current

g

12

mA

OSC2 High Level Input Voltage

24

V

OSC2 Low Level Input Voltage

04

V

DISK DRIVE INTERFACE PINS

(MTR0 – 3 DR0 – 3 WDATA WGATE RDATA DIR HDSEL TRK0 WRTPRT RPM STEP DSKCHG INDEX)

Input Hysteresis

250 Typical

mV

Low Level Output Voltage

04

V

Output High Leakage Current

g

100

m

A

High Level Input Voltage

22

V

Low Level Input Voltage

08

V

Note 1

Absolute Maximum Ratings are those values beyond which damage to the device may occur Continuous operation at these limits is not intended and

should be limited to those conditions specified under DC Electrical Characteristics

Note 2

Unless otherwise specified all voltages are referenced to ground

Note 3

These DC Electrical Characteristics are measured staticly and not under dynamic conditions

Note 4

Note 5

CRB0–7 XTSEL and CRPE are NOT TTL compatible Pull-up resistors must be used if this is a requirement

41