Datasheet

MAX4800/MAX4801/MAX4802
Low-Charge Injection,
8-Channel, High-Voltage Analog Switches
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Applications Information
Logic Levels
The MAX4800/MAX4801/MAX4802 digital interface
inputs CLK, DIN, LE, and CLR are tolerant of up to
+13.2V, independent of the V
DD
supply voltage, allow-
ing compatibility with higher voltage controllers.
Daisy Chaining Multiple Devices
Digital output DOUT is provided to allow the connection
of multiple MAX4800/MAX4801/MAX4802 devices by
daisy chaining (Figure 3). Connect each DOUT to the
DIN of the subsequent device in the chain. Connect CLK,
LE, and CLR inputs of all devices, and drive LE logic-low
to update all devices simultaneously. Drive CLR high to
open all the switches simultaneously. Additional shift reg-
isters may be included anywhere in series with the
MAX4800/MAX4801/MAX4802 data chain.
Supply Sequencing and Bypassing
The MAX4800/MAX4801/MAX4802 do not require spe-
cial sequencing of the V
DD
, V
PP
, and V
NN
supply volt-
ages; however, analog switch inputs must be
unconnected, or satisfy V
NN
≤ (V
COM_
, V
NO_
) ≤ V
PP
during power-up and power-down. Bypass V
DD
, V
NN
,
and V
PP
to GND with a 0.1µF ceramic capacitor as
close to the device as possible.
Chip Information
PROCESS: BCDMOS
DATA BITS CONTROL BITS FUNCTION
D0
(LSB)
D1 D2 D3 D4 D5 D6
D7
(MSB)
LE
CLR SW0 SW1 SW2 SW3 SW4 SW5 SW6 SW7
LLLOFF
HLLON
LLLOFF
HLLON
LLLOFF
HLLON
LLLOFF
HLLON
LLL OFF
HLL ON
LLL OFF
HLL ON
L L L OFF
HLL ON
LL L OFF
HL L ON
X X X X X X X X H L HOLD PREVIOUS STATE
X X X X X X X X X H OFF OFF OFF OFF OFF OFF OFF OFF
Table 1. Serial Interface Programming
X = Don’t Care