ELECTRICAL CHARACTERISTICS:

PARAMETER

SYMBOL

MIN

MAX

UNITS

Count test and Count frequency

(Vss = +5V ± 5%)

DC

7.5

MHz

(Vss = +10V)

DC

6

MHz

(Vss = +15V)

DC

5

MHz

Scan frequency

DC

500

kHz

Count Pulse Width

(Vss = +5V ± 5%)

66

-

ns

(Vss = +10V)

83

-

ns

(Vss = +15V)

100

-

ns

Count Ripple Time

-

12

µs

Load Pulse Width

4

-

µs

Load Removal Tme

-

1

µs

Reset Pulse Width

4

-

µs

Reset Removal Time

-

1

µs

Rise and fall time

Count Pulse

-

4

µs

Reset Pulse

-

4

µs

test Count Pulse

-

80

µs

*Strobe Guard Band time

400

-

ns

≤ 100kHz)

*Strobe Guard Band time

200

-

ns

(100kHz

*Strobe Guard Band time

200

-

ns

(250kHz

negative edge only

FIGURE 2. GUARD BANDED STROBE

BCD

STROBE

f

b

a

g

d

e

c

FIGURE 3. SEVEN SEGMENT FONT

TTL COMPATIBLE OUTPUTS:

OUTPUT LEVELS: “1" Level

≥ Vss - 0.5V (sourcing 100µA)

“0" Level

≤ 0.4V (sinking 1.6mA)

“1" Level

≥ Vss - 0.5V (sourcing 40µA)

“0" Level

≤ 0.4V (sinking .18mA)

All other outputs as specified for single power supply, Vss = + 15V, operation.

Inputs as specified for single power supply, Vss = +5V ± 5% operation.

}

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BLANK AND BCD

DATA OUTPUTS

OVERFLOW

OUTPUT

The information included herein is believed to be

accurate and reliable. However, LSI Computer Systems,

Inc. assumes no responsibilities for inaccuracies, nor for

any infringements of patent rights of others which may

result from its use.

7030-110601-3