MIC2778
Micrel
Absolute Maximum Ratings
(Note 1)
Supply Voltage (V
DD
) ..................................... –0.3V to +7V
Input Voltages (V
HI
, V
LO
) ............................... –0.3V to +7V
RST Output Current (I
RST
) ......................................... 20mA
Storage Temperature (T
S
) ....................... –65°C to +150°C
ESD Rating,
Note 3 ......................................................
2kV
Operating Ratings
(Note 2)
Supply Voltage (V
DD
) .................................. +1.5V to +5.5V
Input Voltages (V
RST
, V
LTH
, V
HTH
) ............. –0.3V to +6.0V
Ambient Temperature Range (T
A
) ............. –40°C to +85°C
Package Thermal Resistance ............................... 256°C/W
Electrical Characteristics
1.5V
≤
V
DD
≤
5.5V; T
A
= +25°C,
bold
values indicate –40°C
≤
T
A
≤
+85°C; unless noted
Symbol
I
DD
I
LTH,
I
HTH
V
REF
Parameter
Supply Current
Input Leakage Current
Condition
RST not asserted
Min
Typ
1
5
10
Reference Voltage
MIC2778-2
MIC2778-1
t
D
t
RESET
V
RST
Propagation Delay
Reset Pulse Width
Voltage-Low Reset
RST asserted, I
SINK
= 1.6mA, V
DD
≥
1.6V
RST asserted, I
SINK
= 100µA, V
DD
≥
1.2V,
Note 1.
Note 2.
Note 3.
Note 4.
Exceeding the absolute maximum rating may damage the device.
The device is not guaranteed to function outside its operating rating.
Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.
V
DD
operating range is 1.5V to 5.5V. Output is guaranteed to be held low down to V
DD
= 1.2V.
Max
2
Units
µA
pA
nA
V
1.240
1.215
1.228
5
140
420
0.3
0.4
1.265
1.252
V
V
µs
ms
V
V
V
LTH
= V
REF(max)
+100mV to
V
REF(min)
– 100mV
Timing Diagram
A
V
HTH
V
BATT
V
LTH
A
0V
V
RST
V
RSTH
V
RSTL
Propagation delays not shown for clarity.
Note A.
The MIC2778 ignores very brief transients.
See “Applications Information” for details.
t
RST
t
RST
October 1999
3
MIC2778
MICREL [ MICREL SEMICONDUCTOR ]
