MIC2778(1999) Ver la hoja de datos (PDF) - Micrel
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MIC2778 Datasheet PDF : 8 Pages
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MIC2778
Absolute Maximum Ratings (Note 1)
Supply Voltage (VDD) ..................................... –0.3V to +7V
Input Voltages (VHI, VLO) ............................... –0.3V to +7V
RST Output Current (IRST) ......................................... 20mA
Storage Temperature (TS) ....................... –65°C to +150°C
ESD Rating, Note 3 ...................................................... 2kV
Micrel
Operating Ratings (Note 2)
Supply Voltage (VDD) .................................. +1.5V to +5.5V
Input Voltages (VRST, VLTH, VHTH) ............. –0.3V to +6.0V
Ambient Temperature Range (TA) ............. –40°C to +85°C
Package Thermal Resistance ............................... 256°C/W
Electrical Characteristics
1.5V ≤ VDD ≤ 5.5V; TA = +25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted
Symbol
Parameter
Condition
IDD
ILTH, IHTH
Supply Current
Input Leakage Current
RST not asserted
Min Typ
1
5
VREF
Reference Voltage
MIC2778-2
1.240
1.215
MIC2778-1
1.228
tD
tRESET
VRST
Propagation Delay
Reset Pulse Width
Voltage-Low Reset
VLTH = VREF(max) +100mV to
VREF(min) – 100mV
5
140
RST asserted, ISINK = 1.6mA, VDD ≥ 1.6V
RST asserted, ISINK = 100µA, VDD ≥ 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.
VDD operating range is 1.5V to 5.5V. Output is guaranteed to be held low down to VDD = 1.2V.
Max
2
10
1.265
1.252
420
0.3
0.4
Units
µA
pA
nA
V
V
V
µs
ms
V
V
Timing Diagram
VHTH
VBATT
VLTH
0V
VRST
VRSTH
VRSTL
A
tRST
A
tRST
Propagation delays not shown for clarity.
Note A. The MIC2778 ignores very brief transients.
See “Applications Information” for details.
October 1999
3
MIC2778
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