Datasheet
MAX4822–MAX4825
+3.3V/+5V, 8-Channel Relay Drivers with Fast
Recovery Time and Power-Save Mode
4 _______________________________________________________________________________________
Note 1: Specifications at -40°C are guaranteed by design and not production tested.
Note 2: Thermal shutdown disables power save from all channels to reduce power dissipation inside the device.
Note 3: Thermal shutdown turns off all channels.
Note 4: The circuit can set the output voltage in power-save mode only if I
OUT
x R
ON
< V
OUTP
.
Note 5: After relay turn-off, inductive kickback can momentarily cause the OUT_ voltage to exceed V
CC
. This is considered part of
normal operation and does not damage the device.
Note 6: Guaranteed by design.
Note 7: For other capacitance values, use the equation t
PS
= 32 x C.
ELECTRICAL CHARACTERISTICS (continued)
(V
CC
= +2.7V to +5.5V, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 2.7V, T
A
= +25°C, unless otherwise
noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Data Hold Time t
DH
0ns
50% of SCLK to (V
IH
, V
IL
of D
IN
),
SCLK Fall to DOUT Valid t
DO
C
L
= 50pF
17 28 ns
Rise Time (DIN, SCLK, CS, SET,
RESET)
t
SCR
20% of V
CC
to 70% of V
CC
, C
L
= 50pF
(Note 6)
2µs
Fall Time (DIN, SCLK, CS,
RESET, SET)
t
SCF
20% of V
CC
to 70% of V
CC
, C
L
= 50pF
(Note 6)
2µs
RESET Minimum Pulse Width t
RW
70 ns
SET Minimum Pulse Width t
SW
70 ns
CS Minimum Pulse Width t
CSW
40 ns
PARALLEL TIMING (MAX4824/MAX4825)
Turn-On Time t
ON
From rising edge of CS, R
L
= 50Ω,
C
L
= 50pF
1µs
Turn-Off Time t
OFF
From rising edge of CS, R
L
= 50Ω,
C
L
= 50pF
3µs
LVL Setup Time t
LS
20 ns
LVL Hold Time t
LH
0ns
Address to CS Setup Time t
AS
20 ns
Address to CS Hold Time t
AH
0ns
Rise Time (A2, A1, A0, LVL) t
SCR
20% of V
CC
to 70% of V
CC
, C
L
= 50pF
(Note 6)
2µs
Fall Time (A2, A1, A0, LVL) t
SCF
20% of V
CC
to 70% of V
CC
, C
L
= 50pF
(Note 6)
2µs
RESET Pulse Width t
RW
70 ns
SET Pulse Width t
SW
70 ns
CS Minimum Pulse Width t
CSW
40 ns
POWER-SAVE TIMING (MAX4822/MAX4824)
Power-Save Delay Time t
PS
Variation from typical value, C
L
= 100nF
(Note 7)
1.6 3.2 5.4 ms
Minimum PSAVE Low Time to
Power-Save Reset
t
PSR
2 3.5 ms