MCP2122-E/P Microchip Technology, MCP2122-E/P Datasheet - Page 6

• Manufacturer Part Number: MCP2122-E/P
• Description: IC ENCODER/DECODER IRDA 8-DIP
• Manufacturer: Microchip Technology
• Type: Infrared Encoder/Decoderr

Specifications of MCP2122-E/P

• Applications: Data-Logging, Data Exchange
• Voltage - Supply, Analog: 1.8 V ~ 5.5 V
• Voltage - Supply, Digital: 1.8 V ~ 5.5 V
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Ic Function: Encoder / Decoder IC
• Supply Voltage Range: 1.8V To 5.5V
• Operating Temperature Range: -40°C To +125°C
• Digital Ic Case Style: DIP
• No. Of Pins: 8
• Peak Reflow Compatible (260 C): Yes
• Leaded Process Compatible: Yes
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP212XDM - BOARD DEVELOPMENT IRDA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

MCP2122
2.3.1
Some applications may subject the MCP2122 to a
brown-out condition. Good design practice requires
that when a system is in brown-out, the system should
be in reset to ensure that the system is in a known
state when the system exits the brown-out. This
brown-out circuitry is external to the MCP2122.
2.3.1.1
Figure 2-2
protection using the TCM809 device.
Figure 2-3
external circuitry that may be implemented. Each
option needs to be evaluated to determine if they
satisfy the requirements of the application.
FIGURE 2-2:
FIGURE 2-3:
DS21894C-page 6
V
Note 1: Resistors should be adjusted for the
DD
33 kΩ
TCM809
2: This circuit will activate reset when
and
BROWN-OUTS
shows a circuit for external brown-out
V
External Brown-Out Reset Circuits
DD
RST
characteristics of the transistor.
V
where Vz = Zener voltage.
Figure 2-4
DD
V
SS
10 kΩ
goes below (Vz + 0.7V),
40 kΩ
EXTERNAL BROWN-OUT
PROTECTION USING THE
TCM809
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
illustrate two examples of
Q1
MCP2122
RESET
V
DD
V
MCP2122
RESET
DD
Preliminary
FIGURE 2-4:
Note 1: This circuit is less expensive, but
R1
R2
V
2: Resistors should be adjusted for the
DD
less accurate. Transistor Q1 turns
off when V
such that:
characteristics of the transistor.
V
40 kΩ
DD
PROTECTION CIRCUIT 2
•
EXTERNAL BROWN-OUT
© 2007 Microchip Technology Inc.
DD
R1 + R2
Q1
is below a certain level
R1
RESET
MCP2122
V
DD
= 0.7V