Rainbow-electronics MAX6656 Manual do Utilizador descarregar pdf (Página 3)

MAX6655/MAX6656

Dual Remote/Local Temperature Sensors and

Four-Channel Voltage Monitors

_______________________________________________________________________________________ 3

ELECTRICAL CHARACTERISTICS (continued)

= +3.0V to +3.6V for MAX6656, V

= +4.5V to +5.5V for MAX6655, T

= -55°C to +125°C, unless otherwise noted. Typical values

are at V

= +3.3V for MAX6656, V

= +5.0V for MAX6655, T

= +25°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

High level 80 100 140

Remote Junction Current

(DXP, DXN)

Low level 8 10 14

µA

SMBus INTERFACE (SMBCLK, SMBDATA, STBY)

Logic Input Low Voltage V

= +3.0V to +5.5V 0.8 V

= +3.0V 2.1

Logic Input High Voltage V

= +5.5V 2.6

Input Leakage Current I

LEAK

= GND or V

±1µA

Output Low Sink Current I

= +0.6V 6 mA

Input Capacitance C

5pF

SMBus Timeout SMBCLK or SMBDATA time low for reset 30 35 60 ms

ALERT, OVERT

Output Low Sink Current V

= +0.6V 6 mA

Output High Leakage Current V

= +5.5V 1 µA

SMBus TIMING

Serial Clock Frequency f

SCL

400 kHz

Bus Free Time Between STOP

and START Condition

BUF

4.7 µs

START Condition Setup Time 4.7 µs

Repeat START Condition Setup

Time

SU:STA

90% to 90% 50 ns

START Condition Hold Time t

HD:STA

10% of SMBDATA to 90% of SMBCLK 4 µs

STOP Condition Setup Time t

SU:STO

90% of SMBCLK to 10% of SMBDATA 4 µs

Clock Low Period t

LOW

10% to 10% 4.7 µs

Clock High Period t

HIGH

90% to 90% 4 µs

Data Setup Time t

SU:DAT

90% of SMBDATA to 10% of SMBCLK 250 ns

Data Hold Time t

HD:DAT

(Note 1) 0 µs

Receive SMBCLK/SMBDATA

Rise Time

1µs

Receive SMBCLK/SMBDATA

Fall Time

300 ns

Pulse Width of Spike

Suppressed

050ns

1 2 3 4 5 6 7 8 ... 17 18

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