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Figure 2 . proposed reset circuit 2, An258, Figure 2. proposed reset circuit 2 – Cirrus Logic AN258 User Manual

Page 2

background image

AN258

2

AN258REV2

Figure 2. Proposed Reset Circuit 2

U6

MAX708CSA

1

2

3

4

5

6

7

8

/MR

Vcc

GND

PFI

/PFO

NC

/RST

RST

5V

R4

Zero Ohm Jumper

R5

560

R1

100K

U7C

74VHC132

9

10

8

U7B

74VHC132

4

5

6

5V

(DEF AULT=INSTALL)

R389
10K

/POR

5V

RDLED

J1

J UMPER

1

2

LED1

RED_LED

R2

R

SW2

PUSHBUTTON

(SEE APP NOTE)

R3
10K

C3
0.1uF

C1

0.1uF

D1

(DO NOT POPULATE)

5V

U7A

74HVC132

1

2

3

C2

2.2uF