PT7M1233A-10TCE

PT7M1233/1233A Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Features  High accurate: 1.5% (25°C) Description   Operating voltage range: 1.0V ~ 5.5V Operating temperature range: -40°C to + 85°C  Detect voltage temperature characteristics: 2.5% The PT7M1233/1233A series are designed to monitor power supplies in µP and digital systems. They provide excellent circuit reliability and low cost by eliminating external components and adjustments.  TYP  Output configuration: Bi-dir  Reset timeout period: typical 200ms The devices perform a single function: assert a reset signal whenever the VCC supply voltage falls below a preset threshold. Reset remains asserted 200ms after VCC has risen above the reset threshold. PT7M1233/1233A are bidirectional output, allowing it to monitor a pushbutton on the reset output. Pin Configuration Pin Description Name Type RST I/O Description Reset Output and Pushbutton Input: RST is asserted when VCC drops below voltage threshold VTH-. Active low. When other devices pull RST low, the reset condition occurs and will remain a reset timeout period at least 200ms. GND P Ground VCC P Supply Voltage. 2013-06-0001 PT0195-4 1 06/17/13 PT7M1233/1233A Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Maximum Ratings Storage Temperature ............................................................-65oC to +150oC Ambient Temperature with Power Applied .......................... -40oC to +85oC Supply Voltage to Ground Potential (Vcc to GND) ..............-0.3V to +7.0V DC Input Voltage (All inputs except Vcc and GND)......-0.3V to VCC+0.3V DC Output Current (All outputs) ..........................................................30mA Power Dissipation .......................................... 320mW (Depend on package) Note: Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. DC Electrical Characteristics (TA= -40~85ºC, unless otherwise noted. Typical values are at T A = +25ºC) Description Sym. Supply Voltage VCC Supply Current ICC Test Conditions Min Typ Max Unit 1.0 - 5.5 V VCC = 5.5V. No load. - - 12 µA VCC = 3.6V. No load. - - 10 µA (VTH-) 0.985 (VTH-) 0.975 (VTH-) 0.985 (VTH-) 0.975 (VTH-) 0.985 (VTH-) 0.975 +25C Voltage Threshold VTH-40C~85C +25C Voltage Threshold (PT7M1233A-10) VTH- Voltage Threshold (PT7M1233A-15) VTH- Hysteresis VHYS Output Driving Output low -40C~85C +25C -40C~85C VOL VTHVTH2.88 2.88 2.72 2.72 (VTH-) 1.015 (VTH-) 1.025 (VTH-) 1.015 (VTH-) 1.025 (VTH-) 1.015 (VTH-) 1.025 VTH+ - VTH-* - 50 - IOH = 8mA, VCC = 5V - - 0.4 IOH = 4mA, VCC = 3V - - 0.3 IOH = -50µA, VCC = 1V - - 0.09 V V V V V V mV V Note: VTH- is voltage threshold when VCC falls from high to low. VTH+ is voltage threshold when VCC rises from low to high. 2013-06-0001 PT0195-4 2 06/17/13 PT7M1233/1233A Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| AC Electrical Characteristics Timing diagram tSEN VCC VRST 1V 0V tRS RST tRPD tRS 1V 0V VRST VCC 1V 0V tRS RST tPD tRS 0.8VCC 1V 0.8V 0V External pull down signal release Uncertain state Note: If tPD < tRS, the reset pulse width will be tRS; if tPD > tRS, the width will be tPD + tRS. (VCC = 1.0V to 5.5V, TA= -40~85ºC, unless otherwise noted. Typical values are at T A = +25ºC) Sym. Description Test Conditions Min Typ Max Unit tRS Reset Timeout Period - 140 200 280 ms tRPD Delay - - 17 - s tSEN Sensitivity - 20 - - s tPD External Pull Down Signal Pulse 1 - - s 140 200 280 ms 0.8 1.5 2.0 V Pushbutton Debounce RST pin RST pin Pushbutton Detect* RST pin *Note: RST will be asserted when it is pull down to the typical value or less. 2013-06-0001 PT0195-4 3 06/17/13 PT7M1233/1233A Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Block Diagram Vcc Reset Monitor VCC Resistor Divider Timing Delay T.C. Reference 5k RST GND Function Description Power Monitor A microprocessor’s (µP’s) reset input starts the µP in a known state. Whenever the µP is in an unknown state, it should be held in reset. The supervisory circuits assert reset during power-up and prevent code execution errors during power-down or brownout conditions. On power-up, once Vcc reaches about 1.0V, RST is a guaranteed logic low of 0.4V or less. As Vcc rises, RST stays low. When Vcc rises above the reset threshold VRST, an internal timer releases RST after about 200ms. RST asserts whenever Vcc drops below the reset threshold, i.e. brownout condition. If brownout occurs in the middle of a previously initiated reset pulse, the pulse continues for at least another 200ms. On power-down, once Vcc falls below the reset threshold, RST stays low and is guaranteed to be 0.4V or less until Vcc drops below 1V. Reset Output: Bi-direction PT7M1233 The devices provide RST output pin for a pushbutton switch. When the devices are not in a reset cycle, it continuously monitors the RST signal for a low going edge. If an edge is detected, the devices will debounce the switch by pulling the RST line low. After the internal timer has expired, the devices will continue to monitor the RST line. If the line is still low, they will continue to monitor the line looking for a rising edge. Upon detecting a release, they will force the RST line low and hold it low for 200ms. PT7M1233A When an out-of-tolerance condition is detected, an internal power fail signal is generated which forces reset to the active state. When VCC returns to an in-tolerance condition, the reset signal is kept in the active state for approximately 200ms to allow the power supply and processor to stabilize. The second function of the PT7M1233A is pushbutton reset control. The PT7M1233A debounces a pushbutton closure and will generate a 200ms reset pulse upon release. 2013-06-0001 PT0195-4 4 06/17/13 PT7M1233/1233A Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Application Information Typical Operation Circuit PT7M1233 Application Example Vcc MICROPROCESSOR RST PT7M1233/1233A RESET 2013-06-0001 PT0195-4 5 06/17/13 PT7M1233/1233A Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Mechanical Information TC (SOT223-3) DOCUMENT CONTROL NO. PD-0022 REVISION: B DATE: 5/16/2011 PKG. DIMENSIONS(MM) SYMBOL MIN MAX A 1.52 1.8 A1 0 0.1 A2 1.5 1.7 b 0.66 0.82 c 0.25 0.35 D 6.2 6.4 D1 2.9 3.1 E 3.3 3.7 E1 6.83 7.07 e 2.30BSC e1 4.5 4.7 L 0.9 1.15 θ 0° 10° Pericom Technology (Shanghai) Co.Ltd. 3/F., 20 Building , 481 Gui Ping Road, Shanghai,200233 Tel:(86-21)6485-0576. Fax: (86-21)6485-2181 Note: 1) Ref : JEDEC TO-261C DESCRIPTION: 3-Pin SOT223 PACKAGE CODE: TC3 2013-06-0001 PT0195-4 6 06/17/13 PT7M1233/1233A Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Ordering Information Part Number PT7M1233-15TCE PT7M1233-10TCE PT7M1233-5TCE PT7M1233A-15TCE PT7M1233A-10TCE Package Code TC TC TC TC TC Package Lead free and Green SOT223 Lead free and Green SOT223 Lead free and Green SOT223 Lead free and Green SOT223 Lead free and Green SOT223 Note:  E = Pb-free or Pb-free and Green  Adding X Suffix= Tape/Reel  Contact Pericom for availability. Function Comparison Table Item 1 2 3 4 5 Part No. PT7M1233-15 PT7M1233-10 PT7M1233-5 PT7M1233A-15 PT7M1233A-10 Reset Output Bi-direct, Active low Bi-direct, Active low Bi-direct, Active low Bi-direct, Active low Bi-direct, Active low Threshold 4.1V 4.3V 4.6V 2.72V 2.88V Pericom Semiconductor Corporation  1-800-435-2336  www.pericom.com Pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. Pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom. 2013-06-0001 PT0195-4 7 06/17/13