參數資料
型號: MCP2122T-E/SN
廠商: Microchip Technology
文件頁數: 35/38頁
文件大?。?/td> 0K
描述: IC ENCODER/DECODER IRDA 8SOIC
標準包裝: 1
類型: 紅外線編碼器/解碼器
應用: 數據記錄,數據交換
電壓 - 電源,模擬: 1.8 V ~ 5.5 V
電壓 - 電源,數字: 1.8 V ~ 5.5 V
安裝類型: 表面貼裝
封裝/外殼: 8-SOIC(0.154",3.90mm 寬)
供應商設備封裝: 8-SOICN
包裝: 標準包裝
產品目錄頁面: 684 (CN2011-ZH PDF)
配用: MCP212XDM-ND - BOARD DEVELOPMENT IRDA
其它名稱: MCP2122T-E/SNDKR
MCP2122
DS21894C-page 6
Preliminary
2007 Microchip Technology Inc.
2.3.1
BROWN-OUTS
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
External Brown-Out Reset Circuits
Figure 2-2 shows a circuit for external brown-out
protection using the TCM809 device.
Figure 2-3 and Figure 2-4 illustrate two examples of
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:
EXTERNAL BROWN-OUT
PROTECTION USING THE
TCM809
FIGURE 2-3:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
FIGURE 2-4:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
VSS
RST
TCM809
VDD
MCP2122
VDD
RESET
Note 1: Resistors should be adjusted for the
characteristics of the transistor.
2: This circuit will activate reset when
VDD goes below (Vz + 0.7V),
where Vz = Zener voltage.
VDD
33 k
Ω
10 k
Ω
40 k
Ω
VDD
RESET
MCP2122
Q1
R2
40 k
Ω
VDD
RESET
MCP2122
R1
Q1
VDD
Note 1: This circuit is less expensive, but
less accurate. Transistor Q1 turns
off when VDD is below a certain level
such that:
2: Resistors should be adjusted for the
characteristics of the transistor.
VDD
R1
R1 + R2
= 0.7V
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