PT7C4302 Datasheet, PDF (12/16 Pages) Pericom Semiconductor Corporation – Real-time Clock Module (3-wire Interface)

Data Sheet
PT7C4302
Real-time Clock Module (3-wire Interface)
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DC Electrical Characteristics
Unless otherwise specified, GND =0V, T_A = 25 °C, Oscillation frequency = 32.768kHz.
Sym
Item
Pin
Conditions
Min Typ Max Unit
V_CC Supply voltage
I_CC1 Current consumption
I_CC2 Current consumption
V_IL1 Low-level input voltage
V_IH1 High-level input voltage
V_IL2 Low-level input voltage
V_IH2 High-level input voltage
V_OL Low-level output voltage
V_OH High-level output voltage
I_IL Input leakage current
V_CC1, V_CC2
V_CC1
V_CC2
SCL, /RST
SCL, /RST
X1
X1
I/O
I/O
/RST, SCLK
Note 5
OSC on, Note 2,6
OSC on, Note 1,6
OSC off, Note 4,6,8
OSC on, Note 2,7
OSC on, Note 1,7
OSC off, Note 4,7
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
I_OH = 1.5mA, V_CC = 2V
I_OH = 4.0mA, V_CC = 5V
I_OH = -0.4mA, V_CC = 2V
I_OH = -1.0mA, V_CC = 5V
Note 3
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
V_CC1: 2V
V_CC1: 5V
2.0 - 5.5 V
-
- 0.4
mA
-
- 1.2
-
0.5
-
µA
-
1
-
- 100 -
nA
- 100 -
-
- 0.425
mA
-
- 1.28
-
- 25.3 _µA
-
- 81
-
-
25 _µA
-
- 80
- 1.1 0.8
V
- 0.6 0.4
2.0 1.3 -
V
1.4 0.9 -
- 1.9 0.8
V
- 0.9 0.6
2.0 1.9 -
V
1.4 0.9 -
- 0.08 0.4
V
- 0.11 0.4
1.6 1.9 -
V
2.4 4.9 -
-
- 500 µA
I_OZ Output current when OFF I/O
Note 3
-
- 500 µA
Trickle Charge Diode
V_{TD Voltage Drop}
-
-
- 0.7 -
V
R1
-
-
-
2
-
R2 Trickle charge resistors
-
-
-
4
- kΩ
R3
-
-
-
8
-
Note:
1. I/O open, /RST set to a logic 0, and /EOSC bit = 0 (oscillator enabled).
2. I/O pin open, /RST high, SCLK=2MHz at V_CC = 5V; SCLK = 500kHz, V_CC = 2.0V, and /EOSC bit = 0 (oscillator enabled).
3. /RST, SCLK, and I/O all have 40kΩ pull-down resistors to ground.
4. /RST, I/O, and SCLK open. The /EOSC bit = 1 (oscillator disabled).
5. VCC = VCC2, when VCC2 > VCC1 + 0.2V; VCC = VCC1, when VCC1 > VCC2.
6. VCC2 = 0V.
7. VCC1 = 0V.
8. Typical values are at 25°C.
PT0225(11/05)
12
Ver: 0