MAX16072 Datasheet, PDF (6/8 Pages) Maxim Integrated Products – μP Supervisory Circuits in 4-Bump (1mm x 1mm) Chip-Scale Package

µP Supervisory Circuits in
4-Bump (1mm x 1mm) Chip-Scale Package
Functional Diagrams
VCC
VCC
RESET
TIMEOUT
RESET
(RESET)
RESET
TIMEOUT
RESET
MAX16072
MAX16073
MAX16074
MR
GND
MR
GND
( ) MAX16073 ONLY
Detailed Description
The MAX16072/MAX16073/MAX16074 ultra-small, ultra-
low-power, µP supervisory circuits feature a precision
band-gap reference, comparator, and internally trimmed
resistors that set specified trip threshold voltages.
Designed to monitor the system supply voltage and an
output during power-up, power-down, and brownout
conditions, these devices provide excellent circuit reli-
ability and low cost by eliminating external components
and adjustments when monitoring nominal system volt-
age from 1.8V to 3.6V.
The MAX16072 has a push-pull active-low reset output,
the MAX16073 has a push-pull active-high reset output,
and the MAX16074 has an open-drain active-low reset
output. The devices are designed to ignore fast tran-
sients on VCC. The devices also include a manual reset
input (MR). When MR is low, reset is asserted. When MR
is high and VCC is above the detector threshold (VTH),
reset is not asserted.
Supply and Monitored Input (VCC)
The MAX16072/MAX16073/MAX16074 operate with a
VCC supply voltage from 1.2V to 2.75V. VCC has a rising
threshold of VTH + VHYST and a falling threshold of VTH.
When VCC rises above VTH + VHYST and MR is high,
RESET goes high (RESET goes low) after the reset time-
out period (tRP). See Figure 1.
When VCC falls below VTH, RESET goes low (RESET
goes high) after a fixed delay (tRD).
VTH
VCC
tMPW
MR
RESET
t_ON
t_DL
Figure 1. MAX16072/MAX16073/MAX16074 Timing Diagram
VTH + VHYST
t < tEGR
t < tMPW
t_RP
t_OFF
t_ON
6   _______________________________________________________________________________________