Rainbow-electronics MAX4821 Uživatelský manuál stáhnout pdf (Strana 3)

MAX4820/MAX4821

3.3V/+5V, 8-Channel, Cascadable Relay Drivers

with Serial/Parallel Interface

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PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

SPI TIMING (MAX4821)

Turn-On Time (OUT_) t

From rising edge of CS, R

= 50Ω,

= 50pF

1.0 µs

Turn-Off Time (OUT_) t

OFF

From rising edge of CS, R

= 50Ω,

= 50pF

1.0 µs

SCLK Frequency f

SCLK

0 2.1 MHz

Cycle Time t

+ t

480 ns

CS Fall to SCLK Rise Setup t

CSS

240 ns

CS Rise to SCLK Hold t

CSH

240 ns

SCLK High Time t

190 ns

SCLK Low Time t

190 ns

Data Setup Time t

100 ns

Data Hold Time t

0ns

SCLK Fall to DOUT Valid t

50% of SCLK to 10% of DOUT,

= 50pF

85 120 ns

Rise Time (DIN, SCLK, CS, SET,

RESET)

SCR

20% of V

to 70% of V

, C

= 50pF 2 µs

Fall Time (DIN, SCLK, CS,

RESET, SET)

SCF

20% of V

to 70% of V

, C

= 50pF 2 µs

RESET Min Pulse Width t

70 ns

SET Min Pulse Width t

70 ns

PARALLEL TIMING (MAX4820)

Turn-On Time t

From rising edge of CS, R

= 50Ω,

= 50pF

1µs

Turn-Off Time t

OFF

From rising edge of CS, R

= 50Ω,

= 50pF

1µs

LVL Setup Time t

100 ns

LVL Hold Time t

0ns

Address to CS Setup Time t

100 ns

Address to CS Hold Time t

0ns

Rise Time (A2, A1, A0, LVL) t

SCR

20% of V

to 70% of V

, C

= 50pF 2 µs

Fall Time (A2, A1, A0, LVL) t

SCF

20% of V

to 70% of V

, C

= 50pF 2 µs

RESET Pulse Width t

70 ns

SET Pulse Width t

70 ns

ELECTRICAL CHARACTERISTICS (continued)

= +3V to +5.5V, V

COM

= V

, T

= -40°C to +85°C, unless otherwise noted. Typical values are at T

= +25°C.) (Note 1)

Note 1: Specifications at -40°C are guaranteed by design and not production tested.

Note 2: After relay turn-off, inductive kickback may momentarily cause the voltage at OUT_ to exceed V

COM

. This is considered part

of normal operation and will not damage the device.

1 2 3 4 5 6 7 8 ... 12 13

MAX4820/MAX4821 1

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