PT7A7511_14 Datasheet, PDF (1/8 Pages) Pericom Semiconductor Corporation – Supervisor Circuits

PT7A7511-15/7521-25/7531-35
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μP Supervisor Circuits
Features
Description
 Precision supply-voltage monitor
- 4.63V (PT7A7511, 7521, 7531)
- 4.38V (PT7A7512, 7522, 7532)
- 3.08V (PT7A7513, 7523, 7533)
- 2.93V (PT7A7514, 7524, 7534)
- 2.63V (PT7A7515, 7525, 7535)
 200ms reset pulse width
 Debounced TTL/CMOS-compatible manual-
reset input
 Independent watchdog timer 1.6sec time-out (not
available for PT7A7531 - 7535)
 Reset output signal:
- Active-low only (PT7A7511 - 7515)
- Active-high only (PT7A7521 - 7525)
- Active-high and active-low (PT7A7531 - 7535)
 Voltage monitor for power-fail or low battery
warning
 Guaranteed RESET/RESET valid at V_CC=1.2V
The PT7A751X/752X/753X family micro-
processor (P) supervisory circuits are targeted to
improve reliability and accuracy of power-supply
circuitry in P’s systems. These devices reduce the
complexity and number of components required to
monitor power-supply and battery functions.
The main functions are:
1. Asserting reset output during power-up, power-
down and brownout conditions for P system.
2. Detecting power failure or low-battery
conditions with a 1.25V threshold detector.
3. Watchdog functions (not for PT7A753x)
Applications
 Power-supply circuitry in P systems
PT7A7511P-7515P
Pin Conf^Pi^Tg⁷u^Ar⁷a⁵¹ti¹o^Wn^-7515W
8-Pin PDIP/8-Pin SOIC
PT7A7521P-7525P
PT7A7521W-7525W
8-Pin PDIP/8-Pin SOIC
PT7A7531P-7535P
PT7A7531W-7535W
8-Pin PDIP/8-Pin SOIC
MR ¹
V _CC ²
GND ³
PFI ⁴
8 WDO
MR ¹
7 RESET _{V CC} 2
6 WDI
GND ³
5 PFO
PFI ⁴
8 WDO
MR ¹
7 RESET _{V CC} 2
6 WDI
GND ³
5 PFO
PFI ⁴
8 RESET
7 RESET
6 NC
5 PFO
PT7A7511W-7515W
Top View
PT7A7521W-7525W
PT7A7531W-7535W
2014-03-0004
PT0082-9
03/26/14
1