Datasheet
MAX6892/MAX6893/MAX6894
Pin-Selectable, Octal/Hex/Quad, Power-Supply
Sequencers/Supervisors
12 ______________________________________________________________________________________
Threshold Logic Inputs (TH0–TH4)
The TH0–TH4 logic inputs select the undervoltage thresh-
olds and tolerance of the IN1–IN8 inputs (MAX6892),
IN1–IN6 inputs (MAX6893), and IN1–IN4 inputs
(MAX6894). TH0–TH4 define 32 unique options for the
supervisor functionality. Connect the respective TH_ to
GND for a logic 0 or to DBP for a logic 1. Tables 1 and 2
show the 32 unique threshold options available. TH4 sets
the threshold tolerance of the undervoltage threshold. A
logic 1 selects a 5% supply tolerance and a logic 0
selects 10% supply tolerance. The MAX6892/MAX6893/
MAX6894 logic determines which thresholds should be
used for the IN inputs only at power-up. Use the voltage-
divider circuit of Figure 1 and Equation 1 to set the
threshold for the user-adjustable inputs as described in
the
Voltage Detector Inputs (IN_)
section.
Table 1. Nominal Monitored Supply Voltages
MONITORED SUPPLY VOLTAGES (V)
SELECTION TH4–TH0
IN1 IN2 IN3 IN4 IN5 IN6 IN7 IN8
SUPPLY
TOLERANCE (%)
1 11111 ADJ 5 3.3 2.5 1.8 ADJ ADJ ADJ 5
2 11110 ADJ 5 3 2.5 1.8 ADJ ADJ ADJ 5
3 11101 ADJ 5 3.3 2.5 ADJ ADJ ADJ ADJ 5
4 11100 ADJ 5 3 2.5 ADJ ADJ ADJ ADJ 5
5 11011 ADJ 5 3.3 1.8 ADJ ADJ ADJ ADJ 5
6 11010 ADJ 5 3 1.8 ADJ ADJ ADJ ADJ 5
7 11001 ADJ 5 3.3 ADJ ADJ ADJ ADJ ADJ 5
8 11000 ADJ 5 3 ADJ ADJ ADJ ADJ ADJ 5
9 10111 ADJ 3.3 2.5 1.8 ADJ ADJ ADJ ADJ 5
10 10110 ADJ 3 2.5 1.8 ADJ ADJ ADJ ADJ 5
11 10101 ADJ 3.3 2.5 ADJ ADJ ADJ ADJ ADJ 5
12 10100 ADJ 3 2.5 ADJ ADJ ADJ ADJ ADJ 5
13 10011 ADJ 3.3 1.8 ADJ ADJ ADJ ADJ ADJ 5
14 10010 ADJ 3 1.8 ADJ ADJ ADJ ADJ ADJ 5
15 10001 ADJ 3.3 2.5 1.8 1.5 ADJ ADJ ADJ 5
16 10000 ADJ 3 2.5 1.8 1.5 ADJ ADJ ADJ 5
17 01111 ADJ 5 3.3 2.5 1.8 ADJ ADJ ADJ 10
18 01110 ADJ 5 3 2.5 1.8 ADJ ADJ ADJ 10
19 01101 ADJ 5 3.3 2.5 ADJ ADJ ADJ ADJ 10
20 01100 ADJ 5 3 2.5 ADJ ADJ ADJ ADJ 10
21 01011 ADJ 5 3.3 1.8 ADJ ADJ ADJ ADJ 10
22 01010 ADJ 5 3 1.8 ADJ ADJ ADJ ADJ 10
23 01001 ADJ 5 3.3 ADJ ADJ ADJ ADJ ADJ 10
24 01000 ADJ 5 3 ADJ ADJ ADJ ADJ ADJ 10
25 00111 ADJ 3.3 2.5 1.8 ADJ ADJ ADJ ADJ 10
26 00110 ADJ 3 2.5 1.8 ADJ ADJ ADJ ADJ 10
27 00101 ADJ 3.3 2.5 ADJ ADJ ADJ ADJ ADJ 10
28 00100 ADJ 3 2.5 ADJ ADJ ADJ ADJ ADJ 10
29 00011 ADJ 3.3 1.8 ADJ ADJ ADJ ADJ ADJ 10
30 00010 ADJ 3 1.8 ADJ ADJ ADJ ADJ ADJ 10
31 00001 ADJ 3.3 2.5 1.8 1.5 ADJ ADJ ADJ 10
32 00000 ADJ ADJ ADJ ADJ ADJ ADJ ADJ ADJ —