MAX16060 Datasheet, PDF (15/18 Pages) Maxim Integrated Products – 1% Accurate, Quad-/Hex-/Octal-Voltage uP Supervisors

1% Accurate, Quad-/Hex-/Octal-Voltage
µP Supervisors
( ) ( ) ^R1
V_TH1 = 1 + _R2 V_TH + V_{TH_HYS}
5V
R1
V_CC
IN1
OUT1
INPUT
R2
IN2 ^MAX16060E OUT2
OUT
IN3
R3
IN4
OUT3
OUT4
R4
GND
( ) V_TH4 =
1
+
R3
R4
V_TH
Figure 6. Window Detection
OUT1
V _TH1
OUT4
V _TH4
OUT
ΔV _TH
Figure 7. Output Response of Window Detector Circuit
V_INTH
R1
R2
V_TH
( ) R1 = R2
V_INTH
V_TH
-1
Figure 8. Setting the Adjustable Input
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 0.373V (TOL = V_CC). To monitor a volt-
age V_INTH, connect a resistive-divider network to the cir-
cuit as shown in Figure 8.
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
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 9).
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