PT7C4302_15 Datasheet, PDF (3/14 Pages) Pericom Semiconductor Corporation – Real-time Clock Module (3-wire Interface)

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 = 32.768 kHz.
Sym
Item
Pin
Conditions
V_CC1 Backup power voltage
VCC1
-
Timing and RAM data maintaining
-
Timing data writing voltage
-
V_CC2 Timing data reading voltage
RAM data writing voltage
VCC2
-
-
RAM data reading 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
VCC1
VCC2
SCL, /RST
SCL, /RST
X1
X1
I/O
I/O
/RST,SCLK
OSC on, Note 2, 5 ^{VCC1: 2V}
V_CC1: 5V
OSC on, Note 1, 5 ^{VCC1: 2V}
V_CC1: 5V
OSC off, Note 4, V_CC1: 2V
5, 7
V_CC1: 5V
OSC on, Note 2, 6 ^{VCC1: 2V}
V_CC1: 5V
OSC on, Note 1, 6 ^{VCC1: 2V}
V_CC1: 5V
OSC off, Note 4, 6 ^{VCC1: 2V}
V_CC1: 5V
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
I_OZ Output current when OFF
I/O
Note 3
Min Typ Max Unit
1.5 - 5.5 V
1.2 - 5.5
1.5 - 5.5
1.5
-
5.5 ^V
3.0 - 5.5
1.5 - 5.5
-
- 0.4
mA
-
- 1.2
- 0.5 -
A
-
1
-
- 100 -
nA
- 100 -
-
- 0.425
mA
-
- 1.28
-
- 25.3
A
-
-
81
-
-
25
A
-
-
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 A
-
- 500 A
V_TD Trickle Charge Diode Voltage Drop -
-
- 0.7 -
V
R1
R2 Trickle charge resistors
R3
-
-
-
-
-
-
-
2
-
-
4
- k
-
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 40k pull-down resistors to ground.
4. /RST, I/O, and SCLK open. The /EOSC bit = 1 (oscillator disabled).
5. V_CC2 = 0V.
6. V_CC1 = 0V.
7. Typical values are at 25C.
2015-11-0004
PT0225-6 11/25/15
3