PT7C4337WEX Pericom Semiconductor, PT7C4337WEX Datasheet - Page 18

• Manufacturer Part Number: PT7C4337WEX
• Description: IC REAL TIME CLK/CALENDAR 8-SOIC
• Manufacturer: Pericom Semiconductor
• Type: Clock/Calendar/Alarmr

Specifications of PT7C4337WEX

• Time Format: Binary
• Date Format: Binary
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 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
• Memory Size: -
• Other names: PT7C4337WEXTR

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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
PT0205(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
=6pF
)]/ [(C
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
-
-
-
18
1
Symbol
32.768
6/12.5
and C
Typ
C
C
C
C
C
C
-
G
D
1
2
1
2
Real-time Clock Module (I
2
, for frequency=32.768Hz, C
Typ
Max
12
12
13
13
0
0
70
-
-
1
and C
Data Sheet
PT7C4337
2
Unit
pF
pF
pF
pF
pF
pF
should meet
Unit
kHz
2
kΩ
pF
C Bus)
Ver: 4