BQ32002 Datasheet, PDF (5/29 Pages) Texas Instruments – BQ32002 Real-Time Clock (RTC)

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BQ32002
SLUSA96B – AUGUST 2010 – REVISED APRIL 2016
6.5 Electrical Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITION
MIN TYP
MAX UNIT
POWER SUPPLY
I_CC
V_CC supply current
V_BACK Backup supply voltage
I_BACK Backup supply current
V_SO Switchover voltage
Operating
Switchover
V_CC = 0 V, V_BAT = 3 V, Oscillator on, T_A = 25°C
Operating → Backup
Backup → Operating
65
1.4
2
0.9 ⁽¹⁾
1.8
2.4
200 μA
V_CC
V
V_CC
1.5 μA
V
LOGIC LEVEL INPUTS
V_IL
Input low voltage
V_IH Input high voltage
I_IN
Input current
LOGIC LEVEL OUTPUTS
0 V ≤ V_IN ≤ V_CC
0.7 × V_CC
–1
0.3 × V_CC V
V
1 μA
V_OL Output low voltage
I_OL = 3 mA
I_L
Leakage current
REAL-TIME CLOCK CHARACTERISTICS
Pre-calibration accuracy
V_CC = 3.3 V, V_BAT = 3 V, Oscillator on, T_A = 25°C
–1
±35 ⁽²⁾
0.4 V
1 μA
ppm
(1) The backup supply current is measured only after an initial power up. The device behavior is not ensured before the first power up.
(2) Typical accuracy is measured using reference board design and KDS DMX-26S surface-mount 32.768-kHz crystal. Variation in board
design and crystal section results in different typical accuracy.
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