LS7030_03 Datasheet, PDF (3/4 Pages) LSI Computer Systems – 8 DECADE MULTIPLEXED COUNTER

ELECTRICAL CHARACTERISTICS:
(VDD = VGG = OV, Vss = +4.75 to +15V, -25˚C ≤ TA ≤ +70˚C unless otherwise specified.)
PARAMETER
SYMBOL
MIN
MAX
UNITS
Count test and Count frequency
(Vss = +5V ± 5%)
fc, ftc
DC
7.5
MHz
(Vss = +10V)
fc, ftc
DC
6
MHz
(Vss = +15V)
fc, ftc
DC
5
MHz
Scan frequency
fsc
DC
500
kHz
Count Pulse Width
(Vss = +5V ± 5%)
(Vss = +10V)
(Vss = +15V)
Count Ripple Time
Load Pulse Width
Load Removal Tme
Reset Pulse Width
Reset Removal Time
tcpw
66
-
ns
tcpw
83
-
ns
tcpw
100
-
ns
tcr
-
12
µs
tlpw
4
-
µs
tlr
-
1
µs
trpw
4
-
µs
trr
-
1
µs
Rise and fall time
Count Pulse
Reset Pulse
test Count Pulse
trfc
-
4
µs
trfr
-
4
µs
trftc
-
80
µs
*Strobe Guard Band time
tgb
(fSC ≤ 100kHz)
*Strobe Guard Band time
tgb
(100kHz ≤ fSC ≤ 250kHz)
*Strobe Guard Band time
tgb
(250kHz ≤ fSC ≤ 500kHz)
negative edge only
400
-
ns
200
-
ns
200
-
ns
a
BCD
f
b
g
t gb
e
c
tgb
d
STROBE
FIGURE 2. GUARD BANDED STROBE
FIGURE 3. SEVEN SEGMENT FONT
TTL COMPATIBLE OUTPUTS:
POWER SUPPLIES: Vss = +5V ± 5%, VDD = 0V, VGG = -12V ± 5%
} ^{OUTPUT LEVELS: “1" Level ≥ Vss - 0.5V (sourcing 100µA) BLANK AND BCD}
“0" Level ≤ 0.4V (sinking 1.6mA)
DATA OUTPUTS
} ^{“1" Level ≥ Vss - 0.5V (sourcing 40µA) OVERFLOW}
“0" Level ≤ 0.4V (sinking 0.18mA)
OUTPUT
All other outputs as specified for single power supply, Vss = + 15V, operation.
Inputs as specified for single power supply, Vss = +5V ± 5% operation.
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.
7030-012703-3