LM628 datasheet(3/35 Pages) TI

3 / 35 page

LM628, LM629

www.ti.com

SNVS781C – JUNE 1999 – REVISED MARCH 2013

DC Electrical Characteristics

(VDD and TA per Operating Ratings; fCLK = 6 MHz)

Tested Limits

Symbol

Parameter

Conditions

Units

Min

Max

IDD

Supply Current

Outputs Open

110

INPUT VOLTAGES

VIH

Logic 1 Input Voltage

2.0

VIL

Logic 0 Input Voltage

0.8

IIN

Input Currents

≤ VIN ≤ VDD

−10

μA

OUTPUT VOLTAGES

VOH

Logic 1

IOH = −1.6 mA

2.4

VOL

Logic 0

IOL = 1.6 mA

0.4

IOUT

TRI-STATE Output Leakage Current

≤ VOUT ≤ VDD

−10

μA

AC Electrical Characteristics

(VDD and TA per Operating Ratings; fCLK = 6 MHz; CLOAD = 50 pF; Input Test Signal tr = tf = 10 ns)

Tested Limits

Timing Interval

Units

Min

Max

ENCODER AND INDEX TIMING (See Figure 3)

Motor-Phase Pulse Width

μs

Dwell-Time per State

μs

Index Pulse Setup and Hold

μs

(Relative to A and B Low)

CLOCK AND RESET TIMING (See Figure 4)

LM628N-6, LM629N-6,

LM629M-6

Clock Pulse Width

LM628N-8, LM629N-8,

LM629M-8

LM628N-6, LM629N-6,

166

LM629M-6

Clock Period

LM628N-8, LM629N-8,

125

LM629M-8

Reset Pulse Width

μs

STATUS BYTE READ TIMING (See Figure 5)

Chip-Select Setup/Hold Time

Port-Select Setup Time

Port-Select Hold Time

Read Data Access Time

T10

180

Read Data Hold Time

T11

RD High to Hi-Z Time

T12

180

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