Datasheet

MAX16000–MAX16007
Low-Voltage, Quad-/Hex-/Octal-Voltage
µP Supervisors
19
Maxim Integrated
Adjustable Input
These devices offer several monitor options with
adjustable input thresholds (see Table 1). The threshold
voltage at each adjustable IN_ input is typically 0.394V
(TOL = GND) or 0.372 (TOL = V
CC
). To monitor a voltage
V
INTH
, connect a resistive-divider network to the circuit as
shown in Figure 10.
V
INTH
= V
TH
((R1 / R2) + 1)
R1 = R2 ((V
INTH
/ V
TH
) - 1)
Large resistors can be used to minimize current through
the external resistors. For greater accuracy, use lower-
value resistors.
Unused Inputs
Connect any unused IN_ inputs to a voltage above its
threshold.
OUT_ Outputs
(MAX16000/MAX16001/MAX16003/
MAX16004/MAX16006)
The OUT_ outputs go low when their respective IN_
inputs drop below their specified thresholds. The output
is open drain with a 30µA internal pullup to V
CC
. For
many applications, no external pullup resistor is required
to interface with other logic devices. An external pullup
resistor to any voltage from 0 to 5.5V overrides the inter-
nal pullup if interfacing to different logic supply voltages.
Internal circuitry prevents reverse current flow from the
external pullup voltage to V
CC
(Figure 11).
MAX16000
MAX16001
GND
V
CC
IN1
5V
R2
INPUT
R1
OUT1
IN2
IN3
OUT
IN4
OUT2
OUT3
OUT4
R4
R3
V
TH1
= (1 +
R1
) (V
TH
+ V
TH_HYS
)
R2
V
TH4
= (1 +
R3
) V
TH
R4
Figure 8. Window Detection
R1
V
INTH
V
TH
R2
R1 = R2(
V
INTH
)
V
TH
- 1
Figure 10. Setting the Adjustable Input
∆V
TH
V
TH4
V
TH1
OUT
OUT4
OUT1
Figure 9. Output Response of Window Detector Circuit