MIC2777 datasheet(3/8 Pages) MICREL

3 / 8 page

November 2005

MIC2777

Micrel, Inc.

Absolute Maximum Ratings (Note 1)

Supply Voltage (VDD).......................................–0.3V to +7V

Input Voltage (VIN)...........................................–0.3V to +7V

RST, (/RST) Current ................................................... 20mA

Storage Temperature (TS) ........................ –65°C to +150°C

ESD Rating,

Note 3.................................................... 1.5kV

Operating Ratings (Note 2)

Supply Voltage (VDD) .................................. +1.5V to +5.5V

Input Voltage

(VIN).............................................................–0.3V to +6.0V

Ambient Temperature Range (TA) .............. –40°C to +85°C

Package Thermal Resistance (θJA).......................256°C/W

Electrical Characteristics

Note 5; TA = +25°C, bold values indicate –40°C ≤ TA ≤ +85°C; unless noted

Symbol

Parameter

Condition

Min

Typ

Max

Units

IDD

Supply Current

VDD = VIN

3.5

µA

Note 5; /MR, RST, /RST open

VDD VOLTAGE THRESHOLD

Under-Voltage Threshold On VDD

VTH-1.5% VTH VTH+1.5%

VHYST

Hysteresis Voltage

IN, UNDER-VOLTAGE DECTECTOR INPUT

VREF

Under-Voltage Threshold

295

300

305

VHYST

Hysteresis Voltage

IIN

Input Current

TMIN ≤ TA ≤ TMAX

RST, /RST OUTPUTS

tPROP

Propagation Delay

VIN = (VREF(MAX) + 100mV) to

µs

VIN = (VREF(MIN) – 100mV) or

VDD = (VTH + 2.5%) to (VTH – 2.5%), VIN =VDD

tRST

Reset Pulse Width

140

280

VOL

RST or /RST Output Voltage Low

ISINK = 1.6mA;

0.3

VDD ≥ 1.6V

ISINK = 100µA;

0.3

VDD ≥ 1.2V, Note 4

VOH

RST or /RST Output Voltage High

ISOURCE = 500µA;

0.8VDD

VDD ≥ 1.5V

RST asserted, ISOURCE = 10µA;

0.8VDD

VDD ≥ 1.2V, Note 4

Note 1. Exceeding the absolute maximum rating may damage the device.

Note 2. The device is not guaranteed to function outside its operating rating.

Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF.

Note 4. VDD operating range is 1.5V to 5.5V. Output is guaranteed to be asserted down to VDD = 1.2V.

Note 5. VDD equals the nominal “Typical Application (VDD)” as shown in “Standard Voltage Options Table.”

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