PT7C4302WEX Pericom Semiconductor, PT7C4302WEX Datasheet - Page 14

• Manufacturer Part Number: PT7C4302WEX
• Description: IC REAL TIME CLK/CALENDAR 8-SOIC
• Manufacturer: Pericom Semiconductor
• Type: Clock/Calendarr

Specifications of PT7C4302WEX

• Memory Size: 31B
• Time Format: Binary
• Date Format: Binary
• Interface: 3-Wire Serial
• Voltage - Supply: 1.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: PT7C4302WEXTR

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Recommended Layout for Crystal
Built-in Capacitors Specifications and Recommended External Capacitors
Note: The frequency of crystal can be optimized by external capacitor C
the equation as below:
Cpar + [(C
Cpar is all parasitical capacitor between X1 and X2.
C
Crystal Specifications
PT0225(08/09)
L
Nominal Frequency
is crystal’s load capacitance.
Load Capacitance
Series Resistance
Recommended External capacitors for
Recommended External capacitors for
Parameter
1
+C
Build-in capacitors
crystal C
G
crystal C
)*(C
2
+C
Note: The crystal, traces and crystal input pins
should be isolated from RF generating signals.
L
=12.5pF
D
L
)]/ [(C
=6pF
Parameter
Symbol
1
ESR
+C
C
f
O
L
G
)+(C
2
+C
D
)] =C
X1 to GND
X2 to GND
X1 to GND
X2 to GND
X1 to GND
X2 to GND
L
Min
-
-
-
14
Real-time Clock Module (3-wire Interface)
Symbol
1
32.768
6/12.5
and C
C
C
C
C
C
C
Typ
G
D
1
2
1
2
-
2
, for frequency=32.768Hz, C
Typ
11
11
12
12
Max
0
0
70
-
-
1
and C
Data Sheet
PT7C4302
Unit
2
pF
pF
pF
pF
pF
pF
should meet
Unit
kHz
kΩ
pF
Ver: 2