u6802b ATMEL Corporation, u6802b Datasheet - Page 2

• Manufacturer Part Number: u6802b
• Description: Triple Driver High-temperature Application
• Manufacturer: ATMEL Corporation

Pin Description
Basic Circuitry
The integrated circuit U6802B requires a stabilized
supply voltage (V
electrical characteristics. An external buffer capacitor of
C = 100 nF is recommended. An integrated 14-V Zener
diode between V
All input stages are provided with an integrated 250-k
pull-up resistor and can be directly connected to a micro-
controller.
All output stages are open collectors – each capable of
sinking 20 mA. Recommended external components:
Functional Description
General
ON state: Low level at the input stage activates the corre-
sponding output stage.
OFF state: The internal pull-up resistor provides high
level to the input comparator and deactivates the output
stage.
7-V Zener diodes between each input pin and GND are
capable of
on adjacent input stages.
A total clamping current of
with respect to the power dissipation.
U6802B
2 (5)
Pull-up resistor, R = 1 k
Capacitor to GND, C = 470 pF, see figure 3
GND
"
V
V
V
O1
O2
O3
10 mA clamping currents without crosstalk
S
1
2
3
4
and ground protects the supply pin.
S
Figure 2. Pinning
= 5 V
"
"
30 mA should be observed
W
5%) to comply with its
13330
8
7
6
5
V
V
V
V
I1
S
I2
I3
W
Current Limitation of the Output Stages
A temperature-dependent current limitation in the range
of 25 mA to 100 mA protects the stages in case of a short.
High-Temperature Application
For direct assembly to a heat sink (chip on board, chip on
silicon), the die version T6802B is available on request.
Transients and Load Dump
An integrated 28-V Zener diode protects each output
stage against transients and load dump (Schaffner pulses).
With the help of external 1-k
transistor is capable to handle the corresponding current
which flows during each of these conditions. Apart from
that, outputs are short circuit and overload protected.
Low-Voltage Detection
When the supply voltage is switched on, a power-on reset
pulse is generated internally which disables all output
stages until a defined supply-voltage level is reached. The
low-voltage detection is provided with a hysteresis of
V
hyst
Pin
1
2
3
4
5
6
7
8
= 0.5 V typically.
Symbol
GND
V
V
V
V
V
V
V
O1
O2
O3
I3
I2
I1
S
Output 1
Ground
Output 2
Output 3
Input 3
Input 2
Supply voltage 5 V
Input 1
W
Function
resistor, the output
Rev. A3, 16-Apr-99