m48t212a STMicroelectronics, m48t212a Datasheet - Page 5

• Manufacturer Part Number: m48t212a
• Description: 3.3v Timekeeper Controller
• Manufacturer: STMicroelectronics

Table 6. Capacitance
(T
Note: 1. Sampled only, not 100% tested.
Table 7. DC Characteristics
(T
Note: 1. Outputs deselected.
Symbol
V
I
A
A
OUT1
I
Symbol
C
I
I
LI
OHB
V
V
LO
V
I
I
V
OUT2
V
I
V
I
V
OUT
CC1
CC2
V
= 25 °C, f = 1 MHz)
= 0 to 70°C; V
BAT
PFD
CAP
CC
C
BAT
OL
OH
SO
(1,2)
2. Outputs deselected.
2. RSTIN1 and RSTIN2 internally pulled-up to V
3. For IRQ/FT & RST pins (Open Drain).
4. Conditioned outputs (E1
5. External SRAM must match TIMEKEEPER Controller chip V
6. When fully charged.
IH
IL
(1)
IN
(4)
(5)
rents will reduce battery life.
(2)
Input Leakage Current
Output Leakage Current
Supply Current
Supply Current (Standby) TTL
Supply Current (Standby) CMOS
Battery Current OSC ON
Battery Current OSC OFF
Input Low Voltage
Input High Voltage
Output Low Voltage
Output Low Voltage (open drain)
Output High Voltage
V
V
V
Power-fail Deselect Voltage
Battery Back-up Switchover Voltage
Battery Voltage
Capacitor Voltage
OH
OUT
OUT
Input Capacitance
Input/Output Capacitance
Battery Back-up
Current (Active)
Current (Battery Back-up)
CC
= 3V to 3.6V)
Parameter
(1)
CON
Parameter
(6)
- E2
CON
) can only sustain CMOS leakage currents in the battery back-up mode. Higher leakage cur-
(3)
CC
through 100K resistor. WDI internally pulled-down to V
V
V
0V
Test Condition
OUT2
0V
I
OUT1
Outputs Open
OUT2
I
E = V
OH
I
I
OL
OL
E = V
V
= –1.0mA
= 2.1mA
> V
V
= 10mA
> V
OUT
= –1.0µA
CC
CC
IN
BAT
specification.
CC
Test Condition
IH
–0.2
V
V
V
–0.3
CC
–0.3
V
OUT
CC
IN
= 0V
= 0V
–0.3
Min
2.0
2.4
2.0
2.7
V
PFD
Min
V
Typ
575
2.9
3.0
–100mV
4
CC
SS
through 100K resistor.
Max
V
10
10
CC
Max
800
100
100
0.8
0.4
0.4
3.6
3.0
±1
±1
10
70
3
2
M48T212A
+ 0.3
Unit
pF
pF
Unit
mA
mA
mA
mA
µA
µA
nA
nA
µA
V
V
V
V
V
V
V
V
V
V
5/20