Rainbow-electronics MAX6871 Uživatelský manuál stáhnout pdf (Strana 5)

MAX6870/MAX6871

EEPROM-Programmable Hex/Quad

Power-Supply Sequencers/Supervisors with ADC

_______________________________________________________________________________________ 5

Note 1: Specifications guaranteed for the stated global conditions. The device also meets the parameters specified when 0 < V

IN1

< +6.5V, and at least one of V

IN3

through V

IN6

is between +2.7V and +5.5V, while the remaining V

IN3

through V

IN6

are

between 0 and +5.5V.

Note 2: Device may be supplied from any one of IN_, except IN2.

Note 3: The internal supply voltage, measured at ABP, equals the maximum of IN3 to IN6 if V

IN1

= 0, or equals +5.4V if V

IN1

+6.5V. For +4V < V

IN1

< +6.5V and V

IN3

through V

IN6

> +2.7V, the input that powers the device cannot be determined.

Note 4: 100% production tested at T

= +25°C and T

= +125°C. Specifications at T

= -40°C are guaranteed by design.

Note 5: V

IN_

> 0.3 x ADC range.

Note 6: Does not include the inaccuracy of the external +1.25V voltage reference.

Note 7: DNL implicitly guaranteed by design in a sigma-delta converter.

Note 8: C

BUS

= total capacitance of one bus line in pF. Rise and fall times are measured between 0.1 x V

BUS

and 0.9 x V

BUS

Note 9: Input filters on SDA, SCL, A0, and A1 suppress noise spikes < 50ns.

Note 10: An additional cycle is required when writing to configuration memory for the first time.

TIMING CHARACTERISTICS

(IN1 = GND, V

IN2

= +10V, V

IN3

to V

IN6

= +2.7V to +5.5V, AUXIN_ = GPI_ = GND, MARGIN = MR = DBP, T

= -40°C to +85°C,

unless otherwise noted. Typical values are at T

= +25°C.) (Notes 1 and 2)

PARAMETER

SYM B O L

CONDITIONS

MIN

TYP

MAX

UNITS

TIMING CHARACTERISTICS (Figure 2)

Serial Clock Frequency f

SCL

400

kHz

Clock Low Period t

LOW

1.3 µs

Clock High Period

HIGH

0.6 µs

Bus-Free Time t

BUF

1.3 µs

START Setup Time

SU:STA

0.6 µs

START Hold Time

HD:STA

0.6 µs

STOP Setup Time

SU:STO

0.6 µs

Data-In Setup Time

SU:DAT

100

Data-In Hold Time

HD:DAT

900

Receive SCL/SDA Minimum Rise Time t

(Note 8)

20 +

0.1 x

BUS

Receive SCL/SDA Maximum Rise Time t

(Note 8)

300

Receive SCL/SDA Minimum Fall Time t

(Note 8)

20 +

0.1 x

BUS

Receive SCL/SDA Maximum Fall Time t

(Note 8)

300

Transmit SDA Fall Time t

BUS

= 400pF

20 +

0.1 x

BUS

300

Pulse Width of Spike Suppressed t

(Note 9) 50 ns

EEPROM Byte Write Cycle Time t

(Note 10) 11 ms

1 2 3 4 5 6 7 8 9 10 ... 50 51

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