ELM460
Pin Descriptions
VDD (pin 1)
determine the actual period of oscillation. Values
of 0.1, 1, 10 and 100 are possible as shown in
the chart on page 1.
This pin is the positive supply pin, and should
always be the most positive point in the circuit.
Internal circuitry connected to this pin is used to
provide power on reset of the microprocessor, so
an external reset signal is not required. Refer to
the Electrical Characteristics section for further
information.
Out (pin 6) and Out (pin 7)
These are the two output pins. Pin 6 is normally
held at a logical high level, and pin 7 at a logical
low. Each pin reverses its state for a period of
50ms at the beginning of each timing cycle,
independent of the overall period selected.
P1 (pin 2) and P0 (pin 3)
These two pins are used to select the base
period for oscillation. P1 is the most significant
bit, and P0 is the least. See the chart on page 1
for possible states of P1 and P0, and the
resulting periods.
VSS (pin 8)
Circuit common is connected to this pin. This is
the most negative point in the circuit.
M1 (pin 4) and M0 (pin 5)
These two pins determine the multiplier that
should be applied to the base period in order to
Ordering Information
These integrated circuits are available in either the 300 mil plastic DIP format, or in the 200 mil SOIC surface
mount type of package. To order, add the appropriate suffix to the part number:
300 mil Plastic DIP............................... ELM460P
200 mil SOIC..................................... ELM460SM
Absolute Maximum Ratings
Storage Temperature....................... -65°C to +150°C
Note:
Stresses beyond those listed here will likely damage
the device. These values are given as a design
guideline only. The ability to operate to these levels
is neither inferred nor recommended.
Ambient Temperature with
Power Applied....................................-40°C to +85°C
Voltage on VDD with respect to VSS............0 to +7.5V
Voltage on any other pin with
respect to VSS........................... -0.6V to (VDD + 0.6V)
All rights reserved. Copyright ©1999 Elm Electronics.
Every effort is made to verify the accuracy of information provided in this document, but no representation or warranty can be
given and no liability assumed by Elm Electronics with respect to the accuracy and/or use of any products or information
described in this document. Elm Electronics will not be responsible for any patent infringements arising from the use of these
products or information, and does not authorize or warrant the use of any Elm Electronics product in life support devices and/or
systems. Elm Electronics reserves the right to make changes to the device(s) described in this document in order to improve
reliability, function, or design.
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ELM460DSB
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