DS1495 Datasheet, PDF (12/19 Pages) Dallas Semiconductor – RAMified Real Time Clock

DS1495/DS1497
ABSOLUTE MAXIMUM RATINGS*
V_DD Pin Potential to Ground Pin
Input Voltage
Power Dissipation
Storage Temperature
Ambient Temperature
Soldering Temperature
-0.3V to +7.0V
V_SS – 0.3 to V_DD + 0.3V
500 mW
DS1497: –40°C to +70°C
DS1495: –55°C to +125°C
0°C to 70°C
260°C for 10 seconds
* This is a stress rating only and functional operation of the device at these or any other conditions above those
indicated in the operation sections of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
CHARACTERISTIC
TEST CONDITION
Supply Voltage
Input High Voltage
Input Low Voltage
Battery Voltage
Recognized as a High Signal Over
Recommended V_DD and t_A Range
Recognized as a Low Signal Over
Recommended V_DD and t_A Range
(0°C to 70°C)
SYM MIN MAX UNITS NOTES
V_CC
4.5
5.5
V
V_IH
2.2 V_DD+
V
0.3
V
V_IL
-0.3
0.8
V
V_BAT 2.5
3.7
V
DC ELECTRICAL CHARACTERISTICS
(V_DD = 5.0V + 10%, V_SS = 0V, t_A = 0° C to 70°C)
CHARACTERISTIC
TEST CONDITION
SYM MIN MAX UNIT NOTES
Input Leakage
V_IL=0V, V_IH=V_DD
For any Single Pin: D0-7, RD, WR,
I_I
A0-5, XRAM, RTC, RESET
+1
µA
Output High Voltage V_DD=5.0V I_LOAD =1 mA
V_OH
2.4
V
Output Low Voltage
V_DD = 5.0V I_LOAD = 2 mA
V_OL
0.4
V
Power Supply Current
STBY pin Input Current
STBY pin Input Current
Outputs Unloaded
STBY=V_DD
STBY=V_SS
I_DD
I_STBY
I_STBY
50
mA
+500 µA
–1
µA
AC SWITCHING CHARACTERISTICS
CHARACTERISTIC
TEST CONDITION
Reset Pulse Width
Oscillator Startup
From Software Enable Via DV Bits
IRQ Release from RD
High
IRQ Release from
RESET Low
(0°C to 70°C; V_DD = 4.5V to 5.5V)
SYM MIN MAX UNIT NOTES
t_RWL
5
µs
t_RC
t_IRDS
1
s
2
µs
t_IRR
2
µs
020894 12/19