Micro crystal RV-8063-C7, Applications Manual, Page: 42 / 58

Micro Crystal
Ultra Small Real-Time Clock Module with SPI-Bus Interface RV-8063-C7
October 2018 42/58 Rev. 1.1
OPERATING PARAMETERS 6.2.
For this Table, T
A
= -40 °C to +85 °C unless otherwise indicated. V
DD
= 0.9 to 5.5 V, TYP values at 25 °C and 3.0 V.
Operating Parameters:
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNIT
Supplies
V
DD
Power supply voltage
Time-keeping mode; interface
inactive; f
SCL
= 0 Hz
(1)
0.9 5.5
V
Interface active; f
SCL
= 1 MHz
(2)
1.8 5.5
I
DD
V
DD
supply current timekeeping.
CLKOUT disabled;
Interface inactive, f
SCL
= 0 Hz
(3)
V
DD
= 3.0 V, T
A
= 25°C 190
nA
V
DD
= 3.0 V, T
A
= 50°C
(4)
230
V
DD
= 3.0 V, T
A
= 85°C 450 600
I
DD
V
DD
supply current timekeeping.
CLKOUT disabled;
Interface active, f
SCL
= 1 MHz
V
DD
= 3.0 V 40 180 µA
Inputs
V
I
Input voltage V
SS
-0.5 V
DD
+0.5 V
V
IL
LOW level input voltage V
SS
0.3 V
DD
V
V
IH
HIGH level input voltage 0.7 V
DD
V
DD
V
I
LEAK
Input leakage current
V
I
= V
SS
or V
DD
0 µA
V
I
= V
SS
or V
DD
, post ESD event -0.15 +0.15 µA
C
I
Input capacitance
On pins SDIO, SCL, CE and
CLKOE
(5)
7 pF
Outputs
V
OH
HIGH level output voltage On pins SDIO, CLKOUT 0.8 V
DD
V
DD
V
V
OL
LOW level output voltage
On pins SDIO,
INT
̅̅̅̅̅
, CLKOUT
V
SS
0.2 V
DD
V
I
OH
HIGH level output current
Output source current
On pin SDIO,
V
OH
= 2.6 V, V
DD
= 3.0 V
2 5 mA
On pin CLKOUT,
V
OH
= 2.6 V, V
DD
= 3.0 V
1 3 mA
I
OL
LOW level output current
Output sink current
On pins SDIO,
INT
̅̅̅̅̅
V
OL
= 0.4 V, V
DD
= 3.0 V
2 6 mA
On pin CLKOUT
V
OL
= 0.4 V, V
DD
= 3.0 V
1 3 mA
(1)
For reliable oscillator start-up at power-on, V
DD
greater than 1.2 V has to be applied. If powered up at 0.9 V, t
START
might be a little higher,
especially at high temperature. Normally the power supply is not 0.9 V at start-up and only occurs at the end of a battery discharge.
V
DD
min of 0.9 V is specified so that the customer can calculate the dimension of a battery or capacitor for a specific application. V
DD
min
of 1.2 V or greater is needed to ensure speedy oscillator start-up time.
(2)
1 MHz SPI operation is production tested at 1.8 V. Design methodology allows SPI operation at 1.8 V - 5 % (1.71 V) which has been
verified during product characterization on a limited number of devices.
(3)
Timer source clock = 1⁄60 Hz; level of pins CE, SDIO, and SCL is V
DD
or V
SS
.
(4)
Tested on sample basis.
(5)
Implicit by design.