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M41T00AUDD1F

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DC and AC parameters M41T00AUD
34/42 Doc ID 13480 Rev 5
10 DC and AC parameters
This section summarizes the operating and measurement conditions, as well as the DC and
AC characteristics of the device. The parameters in the following DC and AC characteristic
tables are derived from tests performed under the measurement conditions listed in the
relevant tables. Designers should check that the operating conditions in their projects match
the measurement conditions when using the quoted parameters.
Figure 17. AC testing input/output waveform
Table 10. Operating and AC measurement conditions
(1)
1. Output Hi-Z is defined as the point where data is no longer driven.
Parameter M41T00AUD
Supply voltage (V
CC
) 3.0 to 3.6 V
Ambient operating temperature (T
A
) 0 to 70 °C
Digital load capacitance (C
L
) 100 pF
Audio load resistance (R
L
) ≥ 8 Ω
Digital input rise and fall times
≤
5 ns
Digital input pulse voltages 0.2V
CC
to 0.8V
CC
Digital input and output timing reference voltages 0.3V
CC
to 0.7V
CC
Table 11. Input/output characteristics (25 °C, f = 1 MHz)
Symbol
Parameter
(1)
1. Effective capacitance measured with power supply at 3.3 V; sampled only, not 100% tested
Min Max Unit
C
IND
Input capacitance, digital inputs 7 pF
C
OUTD
(2)
2. Outputs deselected
Output capacitance, digital outputs 10 pF
t
LP
I
2
C low-pass filter input time constant (SDA and SCL)
50 ns
AI02568
0.8V
CC
0.2V
CC
0.7V
CC
0.3V
CC
M41T00AUD DC and AC parameters
Doc ID 13480 Rev 5 35/42
Table 12. DC characteristics
Symbol Parameter
Test condition
(1)
Min Typ Max Unit
I
LI
Input leakage current
0V
≤ V
IN
≤ V
CC
,
SCL pin
±1 µA
I
LO
Output leakage current
0V
≤ V
OUT
≤ V
CC
,
OUT and SDA pins
±1 µA
I
CC1
Active supply current
No audio (AIN = V
BIAS
),
I
2
C bus active at 400 kHz
6.6 14.7 mA
I
CC2
Standby supply current
No audio (AIN = V
BIAS
),
I
2
C bus not active, SCL = 0 Hz
All inputs ≥ V
CC
– 0.2 V
or
≤ V
SS
+ 0.2 V
6.4 14.3 mA
V
IL
Input low voltage –0.3
0.3V
CC
V
V
IH
Input high voltage
0.7V
CC
V
CC
+ 0.3
V
V
OL
Output low voltage
I
OL
= 3.0 mA
0.4 V
Output low voltage (open
drain)
(2)
I
OL
= 3.0 mA
0.4 V
Pull-up supply voltage
(open drain)
IRQ
/FT/OUT, SDA, SCL Vcc V
V
BACK
(3)
RTC backup supply voltage 1.7
V
CC
V
I
BACK
RTC backup supply current
T
A
= 25 °C, V
CC
= 0 V
oscillator ON,
V
BACK
= 3 V
0.6 1 µA
1. Valid for ambient operating temperature: T
A
= 0 to 70 °C; V
CC
= 3.0 to 3.6 V (except where otherwise noted).
2. For open drain pins IRQ
/FT/OUT and SDA
3. STMicroelectronics recommends the RAYOVAC BR1225 or BR1632 (or equivalent) when a battery is used.
Table 13. Crystal electrical characteristics
Symbol
Parameter
(1)(2)
Min Typ Max Units
f
O
Resonant frequency 32.768 kHz
R
S
Series resistance 40 KΩ
C
L
Load capacitance 12.5 pF
1. Externally supplied if using the SO8 package. STMicroelectronics recommends the KDS DT-38: 1TA/1TC252E127, Tuning
Fork Type (thru-hole) or the DMX-26S: 1TJS125FH2A212, (SMD) quartz crystal for industrial temperature operations. KDS
can be contacted at http://www.kds.info/index_en.htm for further information on this crystal type.
2. Load capacitors are integrated within the M41T00AUD. Circuit board layout considerations for the 32.768 kHz crystal of
minimum trace lengths and isolation from RF generating signals should be taken into account.
DC and AC parameters M41T00AUD
36/42 Doc ID 13480 Rev 5
Figure 18. Power down/up mode AC waveforms
Table 14. RTC power down/up AC characteristics
Symbol
Parameter
(1)(2)
1. Valid for ambient operating temperature: T
A
= 0 to 70 °C; V
CC
= 3.0 to 3.6 V (except where otherwise
noted).
2. V
CC
fall time should not exceed 5 mV/µs.
Min Typ Max Unit
t
PD
SCL and SDA at VIH before power-down 0 ns
t
rec
SCL and SDA at VIH after power-up 10 µs
Table 15. RTC power down/up trip points DC characteristics
Symbol
Parameter
(1)(2)
1. All voltages referenced to V
SS
.
2. Valid for ambient operating temperature: T
A
= 0 to 70 °C; V
CC
= 3.0 to 3.6 V (except where otherwise
noted).
Min Typ Max Unit
V
PFD
Power-fail deselect 2.60 2.8 2.95 V
Hysteresis 10 mV
V
SO
Backup switchover voltage
(V
CC
< V
BACK
; V
CC
< V
PFD
)
2.0 < V
BACK
< V
PFD
V
BACK
V
V
BACK
> V
PFD
V
PFD
V
Hysteresis 10 mV
Table 16. Audio section electrical characteristics, valid for V
CC
= 3.3 V and
T
AMB
= 25 °C (except where otherwise noted)
(1)
1. The lowest step, from GAIN = 0 to GAIN = 1, is not tested.
Symbol Parameter Condition Min Typ Max Unit
V
OO
Output offset voltage
No input signal,
RL = 8 Ω
10 100 mV
P
O-MAX
Maximum output power
THD = 2% Max, f = 1 kHz,
RL = 8 Ω
300 375 mW
P
SRR
Power supply rejection
ratio
RL = 8 Ω, Av = 2,
V
RIPPLE
= 200 mV
PP
audio input grounded
f = 217 Hz
55 61 dB
Gain step size GAIN steps 1-2 to E-F (1) 2 3 4 dB
TWU
Wake-up time after
power-up
C
BIAS
= 1 µF
150 ms
AI00596
V
CC
t
REC
t
PD
V
SO
SDA
SCL
DON'T CARE
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M41T00AUDD1F

Mfr. #:
Buy M41T00AUDD1F
Manufacturer:
STMicroelectronics
Description:
Real Time Clock SERIAL RTC W/AUDIO
Lifecycle:
New from this manufacturer.
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