mc68hc68t1 Freescale Semiconductor, Inc, mc68hc68t1 Datasheet - Page 3

• Manufacturer Part Number: mc68hc68t1
• Description: Mc68hc68t1 Real-time Clock Plus Ram With Serial Interface
• Manufacturer: Freescale Semiconductor, Inc

* Timekeeping function only, no read/write accesses. Data in the registers and RAM retained.
MOTOROLA
ABSOLUTE MAXIMUM RATINGS*
ELECTRICAL CHARACTERISTICS
*** Power Dissipation Temperature Derating:
** See Electrical Characteristics Table.
V (stdby)
Symbol
Symbol
* Maximum Ratings are those values beyond which damage to the device may occur.
V DD
V OH
V OL
I batt
V DD
V out
V IH
I OZ
I DD
I DD
T stg
V IL
I out
I DD
V in
I IH
V in
P D
I in
I IL
T L
I in
Power Supply Voltage Range
Minimum Standby (Timekeeping) Voltage*
Maximum Low–Level Input Voltage
Minimum High–Level Input Voltage
Maximum Input Voltage, Line Input
Maximum Low–Level Output Voltage
Minimum High–Level Output Voltage
Maximum Input Current, Except SS
Maximum Low–Level Input Current, SS
Maximum Pull–Down Current, SS
Maximum Three–State Leakage Current
Maximum Quiescent Supply Current
Maximum RMS Operating Supply Current
Maximum RMS Operating Supply Current
Maximum RMS Standby Current
DC Supply Voltage
DC Input Voltage (except Line Input**)
DC Output Voltage
DC Input Current, per Pin
DC Output Current, per Pin
DC Supply Current, V DD and V SS Pins
Power Dissipation, per Package***
Storage Temperature
Lead Temperature (10–Second Soldering)
Crystal Operation
External Frequency Source
Driving XTAL in , XTAL out Open
Crystal Operation
Parameter
Parameter
(Voltages Referenced to V SS )
(T A = – 40 to + 85 _ C, Voltages Referenced to V SS )
12 mW/ _ C from 65 to 85 _ C.
Power Sense Mode
I out = 0
I out = 1.6 mA
I out = 0
I out = 1.6 mA
V in = V DD or V SS
V in = V SS
V in = V DD
V out = V DD or V SS
V in = V DD or V SS , All Input; I out = 0
I out = 0
V in = V DD or V SS , all
No Serial Access Cycles
I out = 0
V in = V DD or V SS ,
Clock Out Disabled,
No Serial Access
V BATT = 3.0 V,
V SYS = 0.0 V,
V DD = 0.0 V,
I out = 0
V in = Don’t Care, all inputs except XTAL in ,
Clock Out Disabled, No Serial Access Cycles
– 0.5 to V DD + 0.5
– 0.5 to V DD + 0.5
inputs except XTAL in ,
Clock Out Disabled,
Cycles
– 0.5 to + 7.0
– 65 to + 150
Value
m
m
m
m
m
500
260
A
A
A,
A,
A,
10
10
30
Test Condition
Unit
mW
mA
mA
mA
V
V
V
C
C
f XTAL in = 32 kHz
f XTAL in = 32 kHz
f XTAL in = 32 kHz
f XTAL in = 1 MHz
f XTAL in = 2 MHz
f XTAL in = 4 MHz
f XTAL in = 1 MHz
f XTAL in = 2 MHz
f XTAL in = 4 MHz
f XTAL in = 1 MHz
f XTAL in = 2 MHz
f XTAL in = 4 MHz
m
inputs against damage due to high static
voltages or electric fields. However, pre-
cautions must be taken to avoid applications of
any voltage higher than maximum rated volt-
ages to this high–impedance circuit. For proper
operation, V in and V out should be constrained
to the range V SS
appropriate logic voltage level (e.g., either V SS
or V DD ). Unused outputs must be left open.
A
This device contains circuitry to protect the
Unused inputs must always be tied to an
V DD
3.0
4.5
6.0
3.0
4.5
6.0
5.0
4.5
4.5
6.0
6.0
6.0
6.0
6.0
5.0
5.0
0.0
—
—
V
(V in or V out )
Guaranteed
3.0 to 6.0
0.024
Limit
– 1.0
1.35
3.15
0.84
0.12
0.24
100
250
360
600
2.2
0.9
1.8
2.1
4.2
0.1
0.4
4.4
3.7
0.1
0.6
1.2
0.5
12
50
25
10
MC68HC68T1
1
V DD .
V p–p
Unit
mA
m
m
m
m
m
m
V
V
V
V
V
V
A
A
A
A
A
A
3