S42WD61SAS Datasheet PDF - ETC
| Part Number | S42WD61SAS | |
| Description | Dual Voltage Supervisory Circuit With Watchdog Timer | |
| Manufacturers | ETC | |
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S4242/S42WD42/S4261/S42WD61
Dual Voltage Supervisory Circuit
With Watchdog Timer(S42WD61) (S42WD42)
FEATURES
• Precision Dual Voltage Monitor
– VCC Supply Monitor
- Dual reset outputs for complex
microcontroller systems
- Integrated memory write lockout function
- No external components required
• Second Voltage Monitor Output
– Separate VLOW output
– Generates interrupt to MCU
– Generates RESET for dual supply systems
- Guaranteed output assertion to VCC - 1V
• Watchdog Timer (S42WD42, S42WD61)
– 1.6s
• Memory Internally Organized 2 x8
• Extended Programmable Functions
Available on SMS24
• High Reliability
– Endurance: 100,000 erase/write cycles
– Data retention: 100 years
OVERVIEW
The S42xxx are a precision power supervisory circuit. It
automatically monitors the device’s VCC level and will
generate a reset output on two complementary open drain
outputs. In addition to the VCC monitoring, the S42xxx also
provides a second voltage comparator input. This input
has an independent open drain output that can be wire-
OR’ed with the RESET I/O or it can be used as a system
interrupt.
The S42xxx also has an integrated 4k/16k-bit nonvolatile
memory. The memory conforms to the industry standard
two-wire serial interface. In addition to the reset circuitry,
the S42WD42/S42WD61 also has a watchdog timer.
BLOCK DIAGRAM
VCC
8
SCL 6
SDA 5
NONVOLATILE
MEMORY
ARRAY
WRITE
CONTROL
PROGRAMMABLE
RESET PULSE
GENERATOR
2 RESET#
+
–
VSENSE 3
1.26V
4
GND
+
–
VTRIP
RESET
CONTROL
PROGRAMMABLE
WATCHDOG
TIMER
(S42WD42,
S42WD61)
UV
OV
2025 T BD 2.0
7 RESET
1 VLOW#
SUMMIT MICROELECTRONICS, Inc. • 300 Orchard City Drive, Suite 131 • Campbell, CA 95008 • Telephone 408-378-6461 • Fax 408-378-6586 • www.summitmicro.com
© SUMMIT MICROELECTRONICS, Inc. 2000
2025 6.0 4/17/00
Characteristics subject to change without notice
1
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S4242/S42WD42/S4261/S42WD61
VSENSE
VULH
VLOW#
(Under-voltage detect)
tVD1
VUHL
tVD2
FIGURE 4. VSENSE UNDER-VOLTAGE FUNCTION
2025 T fig04 2.0
RESET# (in)
RESET# (out)
RESET (out)
tPURST
tPURST
FIGURE 5. RESET AS AN INPUT
2025 T fig05 2.0
2025 6.0 4/17/00
5
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for S42WD61SAS electronic component. |
| Information | Total 16 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ S42WD61SAS.PDF Datasheet ] | |
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