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32 kHz and 24 MHz Clock Generator with Precision 32 kHz Input
CY2040-2/3
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
Document #: 38-07122 Rev. *A
December 14, 2002
Features
• Precision RTC 32 kHz and 24 MHz output
• Power-down mode (32 kHz on) is < 50 uA
• Suspend mode (V24M = off) is typically 5 uA
• Low RMS period Jitter (< 40 ps)
• 16-pin TSSOP package
•3.3V + 5% Voltage Supply
• CY2040-2 multiplier 32.000 kHz × 750 = 24.0 MHz
(requires a single 32.000 kHz crystal)
• CY2040-3 enables the 32 kHz and 24.0 MHz oscillators
(requires a 32.768 kHz and 24.000 MHz crystal)
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2
3
5
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8
P D 24M #
X IN 32K
X O U T 32K
V 32K
NC
O U T 24M
O U T 32K
32K P L LE N
9
16
10
11
12
13
14
15
VS S
V 24M
X IN 24M
X O U T 24M
O U T 3 2 KPL L
VS S
NC
NC
4
Logic Block Diagram
Pin Configuration
XIN32K
XOUT32K
PD24M#
CONTROL LOGIC
32kHz
OSC
24MHz
OSC
Q=INPUT
DIVIDER
PLL
POST
DIVIDER
P=FEEDBACK
DIVIDER
XIN24M
XOUT24M
OUT24M
OUT32K
32KPLLEN
OUT32KPLL
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