PT7M1818-5TEX

PT7M1818/1813 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Supervisory Circuit Features Description  Highly accurate: 1.5% (25°C)  Accurate power monitoring: 2.5V, 2.9V, 3.0V (PT7M1818), and 4.1, 4.3, 4.6V (PT7M1813)   Operating voltage range: 1.0V ~ 5.5V Operating temperature range: -40°C to + 85°C  Detect voltage temperature characteristics: 2.5%  TYP Efficient open-drain output with internal 5k pull-up resistor   Maintains reset for 200ms after VCC returns to an intolerance condition The series are designed to monitor power supplies in µP and digital systems. It provides excellent circuit reliability and low cost by eliminating external components and adjustments. This device performs a single function: it asserts a reset signal whenever the VCC supply voltage falls below a preset threshold. Reset remains asserted for 200ms after VCC has risen above the reset threshold. PT7M1818/1813 are bidirectional output, allowing it to be directly connected to µP with bidirectional reset inputs. Pin Configuration PT7M1818/1813 1 RST GND 2 3 VCC SOT23-3 Pin Description Name Type Description RST I/O 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 after the external signal is off. GND VCC P P Ground Supply Voltage. 2014-08-0010 PT0190-7 1 09/11/14 PT7M1818/1813 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 +25C Voltage Threshold VTH-40C~85C Hysteresis Output Driving VHYS Output low Internal pull-up resistor VOL VTHVTH- (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 mV V Rp 3.75 5 6.25 k RST Note: VTH- is voltage threshold when VCC falls from high to low. VTH+ is voltage threshold when VCC rises from low to high. 2014-08-0010 PT0190-7 2 09/11/14 PT7M1818/1813 Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| AC Electrical Characteristics Fig 1. Timing diagram tSEN VCC VRST 1V 0V tRPD tRS RST tRS 1V 0V Uncertain state Fig 2. Timing diagram VRST VCC 1V 0V tRS RST tPD tRS 0.8VCC 1V 0.8V 0V External pull down signal release Uncertain state (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 0.8 1.5 2.0 V RST pin Pushbutton Detect* RST pin *Note: RST will be asserted when it is pull down to the typical value or less. 2014-08-0010 PT0190-7 3 09/11/14 PT7M1818/1813 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 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. Application Information Typical Operation Circuit Vcc PT7M1818 PT7M70xxBL /1813 PT7M71xxBL MICROPROCESSOR RST RESET 2014-08-0010 PT0190-7 4 09/11/14 PT7M1818/1813 Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Mechanical Information SOT23-3 DOCUMENT CONTROL NO. PD-0018 REVISION: A DATE: 5/17/2011 PKG. DIMENSIONS(MM) SYMBOL MIN MAX A 1.05 1.25 A1 0.00 0.10 A2 1.05 1.15 b 0.30 0.50 c 0.10 0.20 D 2.82 3.02 E 1.50 1.70 E1 2.65 2.95 e 0.95BSC e1 1.80 2.00 L 0.30 0.60 θ 0° 8° 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) Controlling dimensions in millimeters. DESCRIPTION: 3-Pin Small Outline Transistor, Plastic Package, SOT-23 PACKAGE CODE: TA3 Ordering Information Part Number PT7M1818-20TE PT7M1818-10TE PT7M1818-5TE PT7M1813-15TE PT7M1813-10TE PT7M1813-5TE Package Code T T T T T T Package Lead free and Green SOT23-3 Lead free and Green SOT23-3 Lead free and Green SOT23-3 Lead free and Green SOT23-3 Lead free and Green SOT23-3 Lead free and Green SOT23-3 Note:  E = Pb-free or Pb-free and Green  Adding X Suffix= Tape/Reel  Contact Pericom for availability. 2014-08-0010 PT0190-7 5 09/11/14 PT7M1818/1813 Supervisory Circuit |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| Small Package Top Marking Instruction AA LJ DATE CODE YEAR & WORK WEEK PART NO. 2 BIT CODE (See Table 1) Sample: QWLJ Lead-Free Sign -: lead-free or Lead free and Green PART NO.: PT7M1818-20 DATE CODE: YEAR 2003 WW10 Lead free and Lead free and Green package Table 1. Function comparison Item Part No. 1 2 3 4 5 6 PT7M1818-20 PT7M1818-10 PT7M1818-5 PT7M1813-15 PT7M1813-10 PT7M1813-5 Open-Drain Active high Active low - Reset Output Push-Pull Active high Active low - Bi-direct Active low       VTH- (V) 2.5 2.9 3.0 4.1 4.3 4.6 Table 2 Marking code for products No. 1 2 3 4 5 6 Part No. PT7M1818-20 PT7M1818-10 PT7M1818-5 PT7M1813-15 PT7M1813-10 PT7M1813-5 Code QW RA RB RL RO RR 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. 2014-08-0010 PT0190-7 6 09/11/14