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PDF ASM809 Data sheet ( Hoja de datos )
| Número de pieza | ASM809 | |
| Descripción | (ASM809 / ASM810) 3 Pin Microcontroller Power Supply Supervisor | |
| Fabricantes | Alliance Semiconductor Corporation | |
| Logotipo |  |
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October 2003
rev 1.0
ASM809, ASM810
3 Pin Microcontroller Power Supply Supervisor
General Description
The ASM809/ASM810 are cost effective 3.0V, 3.3V and 5.0V
power supply supervisor circuits optimized for low-power
microprocessor (µP), microcontroller (µC) and digital systems.
They provide a reset output during power-up, power-down and
brown-out conditions. They provide excellent reliability by
eliminating external components and adjustments. The
ASM809/810 are improved drop-in replacements for the Maxim
www.DaMtAaXS8h0e9e/8t140Ua.ncdofmeature 60% lower supply current.
A reset signal is issued if the power supply voltage drops below
a preset reset threshold and is asserted for at least 140ms after
the supply has risen above the reset threshold. The ASM809
has an active-low RESET output that is guaranteed to be in the
correct logic state for VCC down to 1.1V. The ASM810 has an
active-high RESET output. The reset comparator is designed to
ignore fast transients on VCC.
Low supply current makes the ASM809/ASM810 ideal for use
in portable and battery operated equipment. The
ASM809/ASM810 are available in a compact, industry standard
3-pin SOT23 package.
Six voltage thresholds are available to support 3V to 5V
systems:
RESET THRESHOLD
Suffix
L
M
J
T
S
R
Voltage
4.63
4.38
4.00
3.08
2.93
2.63
Features:
• Monitor 5V, 3.3V and 3V supplies
• 140ms min. reset pulse width
• Active-low reset valid with 1.1V supply (ASM809)
• Small 3-pin SOT-23 package
• No external components
• Specified over full temperature range - -40°C to 105°C
Applications
• Embedded controllers
• Portable/Battery operated systems
• Intelligent instruments
• Wireless communication systems
• PDAs and handheld equipment
• Computers
Typical Operating Circuit
VCC
VCC
RESET
(RESET)
GND
VCC
µP
RESET (RESET)
Input
GND
Alliance Semiconductor
2575 Augustine Drive . Santa Clara, CA 95054 . Tel: 408.855.4900 . Fax: 408.855.4999 . www.alsc.com
Notice: The information in this document is subject to change without notice
1 page  
October 2003
rev 1.0
Electrical Characteristics:
Unless otherwise noted, VCC is over the full voltage range, TA = -40°C to 105°C.
Typical values at TA = 25°C, VCC = 5V for L/M/J devices, VCC = 3.3V for T/S devices and VCC = 3V for R devices.
ASM809, ASM810
Symbol
Parameter
Conditions
Min Typ Max Unit
VCC
Input Voltage
Range
www.DataSIChCeet4US.ucpopmly Current
VTH Reset Threshold
Reset Threshold
Temp Coefficient
VCC to Reset
Delay
TA = 0°C to 70°C
TA = -40°C to 105°C
TA= -40°C to 85°C
TA = -40°C to 85°C
TA = 85°C to 105°C
TA = 85°C to 105°C
VCC < 5.5V, L/M/J
VCC < 3.6V, R/S/T
VCC < 5.5V, L/M/J
VCC < 3.6V, R/S/T
L devices
TA = 25°C
TA = -40°C to 85°C
TA = 85°C to 105°C
M devices
TA = 25°C
TA = -40°C to 85°C
TA = 85°C to 105°C
J devices
TA = 25°C
TA = -40°C to 85°C
TA = 85°C to 105°C
T devices
TA = 25°C
TA = -40°C to 85°C
TA = 85°C to 105°C
S devices
TA = 25°C
TA = -40°C to 85°C
TA = 85°C to 105°C
R devices
TA = 25°C
TA = -40°C to 85°C
TA = 85°C to 105°C
VCC = VTH to VTH-100mV
1.1 5.5
1.2 5.5
9 15
6.8 10
25
20
4.56 4.70
4.50 4.63 4.75
4.40 4.86
4.31 4.45
4.25 4.38 4.50
4.16 4.56
3.93 4.06
3.89 4.00 4.10
3.80 4.20
3.04 3.11
3.00 3.08 3.15
2.92 3.23
2.89 2.96
2.85 2.93 3.00
2.78 3.08
2.59 2.66
2.55 2.63 2.70
2.50 2.76
V
V
µA
V
30 ppm/°C
60 µs
Notes:
1. Production testing done at TA = 25°C. Over-temperature specifications guaranteed by design only, using six sigma design limits.
2. RESET output is active LOW for the ASM809 and RESET output is active HIGH for the ASM810.
3 Pin Microcontroller Power Supply Supervisor
Notice: The information in this document is subject to change without notice
5 of 10
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet ASM809.PDF ] | |
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