TCM809 Datasheet, PDF (1/4 Pages) TelCom Semiconductor, Inc – 3-PIN UP RESET MONITORS

1 ^{PRELIMINARY INFORMATION}
TCM809
TCM810
3-PIN µP RESET MONITORS
FEATURES
s Precision V_CC Monitor for 3.0V, 3.3V, 5.0V
Nominal System V Supplies
s 140msec Guaranteed Minimum RESET, RESET
Output Duration
s RESET Output Guaranteed to V_CC = 1.0V (TCM809)
s Low 17µA Supply Current
s V_CC Transient Immunity
s Small SOT-23B-3 Package
s No External Components
TYPICAL APPLICATIONS
s Computers
s Embedded Systems
s Battery Powered Equipment
s Critical µP Power Supply Monitoring
TYPICAL OPERATING CIRCUIT
V_CC
V_CC
RESET
TCM809
GND
V_CC
PROCESSOR
RESET
INPUT
GND
PIN CONFIGURATION
*SOT-23B-3
2
GENERAL DESCRIPTION
The TCM809 and TCM810 are cost-effective system
supervisor circuits designed to monitor V_CC in digital sys-
tems and provide a reset signal to the host processor when
necessary. No external components are required.
3 ^{The reset output is driven active within 20msec of VCC}
falling through the reset voltage threshold. Reset is main-
tained active for a minimum of 140msec after V_CC rises
above the reset threshold. The TCM810 has an active-high
reset output while the TCM809 has an active-low reset
output. The output of the TCM809 is guaranteed valid down
to V_CC = 1V. Both devices are available in a
SOT-23B-3 package.
4 ^{The TCM809/810 are optimized to reject fast transient}
glitches on the V_CC line. Low supply current of 17µA
(V_CC = 3.3V) makes these devices suitable for battery
powered applications.
ORDERING INFORMATION
Part No.
Package
Temp. Range
TCM809xENB
TCM810xENB
SOT-23B-3
SOT-23B-3
5 ^{– 40°C to +85°C}
– 40°C to +85°C
NOTE: The "X" denotes a suffix for V_CC threshold - see table below.
Suffix
L
M
T
S
R
Reset V_CC Threshold (V)
4.63
4.38
6
3.08
2.93
2.63
GND 1
TCM809xENB 3 VCC
TCM810xENB
RESET (RESET) 2
NOTE: *SOT-23B-3 is equivalent to JEDEC (TO-236)
** () is for TCM810
TELCOM SEMICONDUCTOR, INC.
7
TCM809/810-04 8/29/96
5-15
8