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PDF SP1404BW Data sheet ( Hoja de datos )
| Número de pieza | SP1404BW | |
| Descripción | HIGH VOLTAGE INTERFACE CIRCUIT | |
| Fabricantes | GEC Plesset | |
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SP1404BW, D3702
ADVANCE INFORMATION
DS3139-2.0
SP1404BW
HIGH VOLTAGE INTERFACE CIRCUIT
The SP1404 is a bipolar integrated circuit comprising five
individual digital current amplifier circuits. Each circuit accepts
a logic input from TTL, CMOS or a similar source and drives a
high-current load at the output. The outputs are capable of
withstanding high negative voltages in the ‘off’ state, making
the SP1404 particularly suited to telecommunications
applications.
+VCC
INPUT 1
INPUT 2
INPUT 3
14
1 NC
OUTPUT 1
OUTPUT 2
OUTPUT 3
CIRCUIT DESCRIPTION (Fig.2)
INPUT 4
OUTPUT 4
The SP1404 operates as a power amplifier interfacing from
INPUT 5
OUTPUT 5
a voltage-level sensitive input to a high-current output switch.
The input threshold is TTL-compatible, with a low input current
requirement enabling one standard TTL output to drive many
0V EXCHANGE 8
7 0V ELECTRONIC
DP14
interfaces. The low input current requirement also makes it
possible to use series current-limiting resistors to protect the
Figure 1: Pin connections (viewed from underside)
SP1404 inputs.
Each element of the device performs as inverting function,
i.e. a low voltage level on the input causes a high current in the
output. If the input is left open-circuit, the output will be off and
the output current will be zero.
The isolation of the integrated circuit is biased to the more
+VCC
BIAS CHAIN
FOR ALL 5
ELEMENTS
negative of the two earth points by diodes D1 and D2 so that
differences of up to (VCC- 1) volts can be tolerated betweewnwwt.DhaetaSheet4U.com
‘noisy’ exchange earth and the ‘quiet’ electronic earth.
ABSOLUTE MAXIMUM RATINGS
Storage temperature
-55°C to +175°C
Chip operating temperature
+150°C
Ambient temperature (IOUT = 50mA)
Load current
+85 °C
80mA
Voltage between output and ‘noisy earth’
-65V
VCC to output voltage
VCC to electronic earth
Input voltage
75V
7V
VCC + 1V
INPUT
0V
ELECTRONIC
D1
SUBSTRATE
0V
EXCHANGE
D2
SUBSTRATE
OUTPUT
ELECTRICAL CHARACTERISTICS
Test conditions (unless otherwise stated):
Temperature range = 0°C to +70°C, VCC = +5V ± 0.5V
Characteristic
Min.
Value
Typ.
Input current
-20
Output voltage
Output current (Off state)
Output current (On state)
VCC supply current
Total power dissipation
50 80
30
450
Figure 2: Circuit diagram of one element
Max.
1.5
100
Units
µA
µA
V
µA
mA
mA
mW
Conditions
VIN = 0V
VIN = VCC
VIN = 0.8V, I OUT = 50mA
VIN = 2V, VOUT = -60V
VIN = 0.8V
VCC = 5V, all inputs low
VCC = 5V, all inputs low
all outputs IOUT = 50mA
1
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