PT7C4337_13 Datasheet, PDF (3/23 Pages) Pericom Semiconductor Corporation – Real-time Clock Module

PT7C4337
Real-time Clock Module (I²C Bus)
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Operating Mode
The amount of current consumed by the PT7C4337 is determined, in part, by the I²C interface and oscillator operation. The
following table shows the relationship between the operating mode and the corresponding I_CC parameter.
Operating Mode
I²C Interface Active
I²C Interface Inactive
I²C Interface Inactive
I²C Interface Inactive, Oscillator Disabled
V_CC
1.8V ≤ V_CC ≤ 5.5V
1.8V ≤ V_CC ≤ 5.5V
1.2V ≤ V_CC ≤ 1.8V
1.2V ≤ V_CC ≤ 1.8V
Power
I_CC Active (I_CCA)
I_CC Standby (I_CCS)
Timekeeping (I_CCTOSC)
Data Retention (I_CCTDDR)
Recommended Operating Conditions
Part No.
Sym.
Description
PT7C4337
V_CC
V_CCT
V_OSC
V_IH
V_IL
T_A
V_CC supply voltage
Oscillator start up voltage
Input high level
Input low level
Operating temperature
SCL, SDA
INTA, SQW/INTB
Min
1.8
1.2
1.2
0.7V_CC
-
-0.3
-40
Type
3.3
-
-
-
-
-
-
Max Unit
5.5
1.8
5.5
V
V_CC+0.3
5.5
0.3V_CC
85
ºC
DC Electrical Characteristics
Unless otherwise specified, V_CC = 1.8~5.5V, T_A = -40 °C to +85 °C
Sym.
Item
Pin
Condition
V_CC
V_CCT
V_OSC
V_IL1
V_IH1
V_IL2
V_IH2
I_OL
I_IL
I_OZ
Supply voltage
Oscillator voltage
Low-level input voltage
High-level input voltage
Low-level input voltage
High-level input voltage
Low-level output current
Input leakage current
Output current when OFF
V_CC
V_CC
SCL
SCL
X1
X1
SDA, /INTA, /INTB
SCL
SDA, /INTA, /INTB
Full operation
Timekeeping (Note 5)
V_OL = 0.4V
Min Typ Max Unit
1.8
-
5.5 V
1.2
-
1.8
1.2
-
5.5 V
-0.3
- 0.3V_{CC V}
0.7V_CC - V_CC+0.3
- 0.53 -
V
- 0.53 -
3
-
- mA
-1
-
1 A
-1
-
1 A
2013-06-0002
PT0205-9 06/18/13
3