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
Symbol
I
DD
1.5V ≤ V
DD
≤ 5.5V; T
A
= +25°C,
bold
values indicate –40°C ≤ T
A
≤ +85°C; unless noted
Parameter
Condition
Supply Current
Input Leakage Current
Reference Voltage
MIC2778-2
MIC2778-1
t
D
t
RESET
V
RST
Propagation Delay
Reset Pulse Width
Voltage-Low Reset
V
LTH
= V
REF(max)
+100mV to
V
REF(min)
– 100mV
RST asserted, I
SINK
= 1.6mA, V
DD
≥ 1.6V
1.215
1.228
5
140
420
0.3
0.4
RST not asserted
Min
Typ
1
5
10
1.240
1.265
1.252
Max
2
Units
µA
pA
nA
V
V
V
µs
ms
V
V
I
LTH,
I
HTH
V
REF
RST asserted, I
SINK
= 100µA, V
DD
≥ 1.2V,
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.
Note 1.
Note 2.
Note 3.
Note 4.
Timing Diagram
V
BATT
V
HTH
V
LTH
0V
t
RST
A
t
RST
A
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.
January 2005
3
M9999-011405
MICREL [ MICREL SEMICONDUCTOR ]
