SP1404BW Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – HIGH VOLTAGE INTERFACE CIRCUIT

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.
CIRCUIT DESCRIPTION (Fig.2)
The SP1404 operates as a power amplifier interfacing from
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
interfaces. The low input current requirement also makes it
possible to use series current-limiting resistors to protect the
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
negative of the two earth points by diodes D1 and D2 so that
differences of up to (V_CC- 1) volts can be tolerated between the
‘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 (I_OUT = 50mA)
Load current
+85 °C
80mA
Voltage between output and ‘noisy earth’
-65V
V_CC to output voltage
V_CC to electronic earth
Input voltage
75V
7V
V_CC + 1V
+V_CC 14
INPUT 1
INPUT 2
INPUT 3
INPUT 4
INPUT 5
0V EXCHANGE 8
1 NC
OUTPUT 1
OUTPUT 2
OUTPUT 3
OUTPUT 4
OUTPUT 5
7 0V ELECTRONIC
DP14
Figure 1: Pin connections (viewed from underside)
+VCC
BIAS CHAIN
FOR ALL 5
ELEMENTS
INPUT
0V
ELECTRONIC
D1
SUBSTRATE
0V
EXCHANGE
D2
SUBSTRATE
OUTPUT
ELECTRICAL CHARACTERISTICS
Test conditions (unless otherwise stated):
Temperature range = 0°C to +70°C, V_CC = +5V ± 0.5V
Characteristic
Min.
Value
Typ.
Input current
-20
Output voltage
Output current (Off state)
Output current (On state)
V_CC 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
V_IN = 0V
V_IN = V_CC
V_IN = 0.8V, I _OUT = 50mA
V_IN = 2V, V_OUT = -60V
V_IN = 0.8V
V_CC = 5V, all inputs low
V_CC = 5V, all inputs low
all outputs I_OUT = 50mA
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