FSP2200 FOSLINK | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 7
Technical content
3 PIN MICROPROCESSOR RESET MONITORS
PIN CONFIGURATION (Top View) Pin Name Function
1 GND Ground reference
Active-low output. RESET remains low while VCC is below the reset threshold, and for a reset timeout period after VCC rises above the reset threshold. 3 VCC Supply voltage (typ.) TYPICAL OPERATION CIRCUIT GENERAL DESCRIPTION The FSP2200 is a microprocessor supervisory circuits used to monitor the power supplies in MPU and digital systems. They provide exce llent circuit reliability and low cost by eliminating external components and adjustments when used with +5V, +3.3V, +3.0V, or +2.5V powered circuits These curcuits perform a single function: they assert a reset signal whenever the Vcc supply voltage declines below a preset threshold, keeping it asserted for at least 140ms after Vcc has risen above the reset threshold. Reset thresholds suitable for operation whit a variety of supply voltages are available. The FSP2200 have push-pull outputs, an active-low RESET output. The reset com parator is designed to ignore fast transients on Vcc, and the outputs are guaranteed to be in the correct logic state for Vcc down to 1V. Low supply current makes the FSP2200 ideal for use in portable equipment. The FSP2200 are available in SOT323-3L or SOT23-3L packages. FEATURES z Precision VCC Monitor for 2.5 V, 3.0V, 3.3 V, and
5.0 V Supplies
z Fully Specified Over Temperature z Available in Three Output Configurations Push-Pull RESET Output z 140ms min Power-On Reset Pulse Width z 12µA Supply Current z Guaranteed Reset Valid to Vcc=+1V z Power Supply Transient Immunity z No External Components z SOT323-3L and SOT23-3L Packages APPLICATIONS z Computers z Controllers z Intelligent Instruments z Critical MPU and MPU Power Monitoring z Portable/Battery-Powered Equipment z Automotive 2RESET GND VCC
ABSOLUTE MAXIMUM RATINGS Parameter Symbol Value Unit VCC -0.3 to 6.0 VRESET(push-pull) -0.3 to (VCC + 0.3) Terminal Voltage (with respect to GND) VRESET(push-drain) -0.3 to 6.0 V Output Current, RESET 20 mA Rate of Rise, VCC 100 V/µs SOT323-3L 174 Continuous Power Dissipation(TA=70°C) SOT23-3L 320 mW SOT323-3L -40 to +125 Operating Temperature Range SOT23-3L -40 to +105 °C Storage Temperature Range Tstg -65 to +150 °C Lead Temperature (Soldering, 10 Seconds) T L 300 °C ELECTRICAL CHARACTERISTICS (Vcc=full range, TA = -40°C to +105°C(SOT23) or TA = -40°C to +125°C(SOT323)unless otherwise noted.) Parameter Symbol Conditions Min. Typ. Max. Unit TA=0°C to +70 1.0 5.5 TA=-40°C to +105°C(SOT23) 1.2 5.5 Vcc Range TA=-40°C to +125°C(SOT323) 1.2 5.5 V VCC＜5.5V,FSP2200-4.63/4.38 24 60 TA=-40°C to +85°C VC＜3.6V, FSP2200-2.32/2.63/2.93/3.08 17 50 VCC＜5.5V,FSP2200-4.63/4.38 100 Supply Current(SOT23) ICC TA=+85°C to +105°C VCC＜3.6V, VCC＜5.5V,FSP2200-4.63/4.38 24 35 TA=-40°C to +85°C VCC＜3.6V, FSP2200-2.32/2.63/2.93/3.08 17 30 VCC＜5.5V,FSP2200-4.63/4.38 60 Supply Current(SOT323) ICC TA=+85°C to +125°C VCC＜3.6V, μA TA=-40°C to +85°C 4.50 4.75FSP2200- 4.63 TA=-40°C to +105°C 4.40 4.86 TA=-40°C to +85°C 4.25 4.50FSP2200- 4.38 TA=-40°C to +105°C 4.16 4.56 TA=-40°C to +85°C 3.89 4.10FSP2200- 4.00 TA=-40°C to +105°C 3.80 4.20 TA=-40°C to +85°C 3.00 3.15FSP2200- 3.08 TA=-40°C to +105°C 2.92 3.23 TA=-40°C to +85°C 2.85 3.00FSP2200- 2.93 TA=-40°C to +105°C 2.78 3.08 Reset Threshold (SOT23) VTH FSP2200- 2.63 TA=-40°C to +105°C 2.50 2.76 V
ELECTRICAL CHARACTERISTICS (CONTINUED) (Vcc=full range, TA = -40°C to +105°C(SOT23) or TA = -40°C to +125°C(SOT323)unless otherwise noted.) Parameter Symbol Conditions Min. Typ. Max. Unit TA=-40°C to +85°C 4.50 4.75FSP2200- 4.63 TA=-40°C to +125°C 4.44 4.82 TA=-40°C to +85°C 4.25 4.50FSP2200- 4.38 TA=-40°C to +125°C 4.20 4.56 TA=-40°C to +85°C 3.00 3.15FSP2200- 3.08 TA=-40°C to +125°C 2.95 3.21 TA=-40°C to +85°C 2.85 3.00FSP2200- 2.93 TA=-40°C to +125°C 2.81 3.05 TA=-40°C to +85°C 2.55 2.70FSP2200- 2.63 TA=-40°C to +125°C 2.52 2.74 Reset Threshold (SOT323) VTH FSP2200- 2.32 TA=-40°C to +125°C 2.22 2.42 V Reset Threshold Tempco 30 ppm/°C Vcc to Reset Delay Vcc= V TH to (VTH-100mV) 20 μs TA=-40°C to +85°C 140 240 560Reset Active Timeout Period(SOT23) TA=-40°C to +105°C 100 840 TA=-40°C to +85°C 140 240 460Reset Active Timeout Period(SOT323) TA=-40°C to +125°C 100 840 ms Vcc=VTH min, ISINK=1.2mA Vcc=VTH min, ISINK=3.2mA RESET Output Voltage Low (push-pull active low) VOL Vcc＞1.0V, ISINK=50µA 0.3 V Vcc＞VTH max, ISOURCE=500µA Voltage High (push-pull active low) VOH Vcc＞VTH max, ISOURCE=80µA V Typical Values: TA=-+25°C Vcc=5V for FSP2200-4.00/4.38/4.63 Vcc=3.3V for FSP2200-3.08/2.93 Vcc=3V for FSP2200-2.63 Vcc=2.5V for FSP2200-2.32
DETAILED DESCRIPTION A microprocessor's (MPU) reset input starts the MPU in a known state. The FSP2200 reset to prevent code execution errors during power-up, power-down, or brownout conditions. They assert a reset signal whenever the Vcc supply voltage declines below a preset thresh-old, ke eping it asserted for at least 140ms after Vcc has risen above the reset threshold. The FSP2200 push-pull output stage. APPLICATION INFORMATION Negative-Going VCC Transients In addition to issuing a reset to the MPU during power-up, power-down, and brownout conditions, the FSP2200 is relatively immune to short-duration negative-going Vcc tr ansients (glitches). Figure 1 shows typical transient duration vs. reset comparator overdrive, for which the FSP2200 do not generate a reset pulse. The graph was generated using a negative going pulse applied to Vcc, star ting 0.5V above the actual reset threshold and ending below it by the magnitude in dicated (reset comparator overdrive). The graph indicates the maximum pulse width a negative-going Vcc transient can have wit hout causing a reset pulse. As the m agnitude of the transient increases (goes farther below the reset threshold), the maximum allowable pulse width decrea ses. Typically, for the FSP2200-4.63/4.38, a Vcc transient that goes 100mV below the reset threshold and lasts 20µs or less will not cause a reset pulse. A 0.1µF bypass capacitor mounted as close as possible to the VCC pin provides additional transient immunity. F i g u r e 1 F i g u r e 2 Ensuring a Valid Reset Output: Down to VCC = 0 When VCC falls below 1V, the FSP2200 RESET output no longer sinks current-it becomes an open circuit. Therefore, high-impedance CMOS logi c input connected to RESET can dr ift to undetermined voltages. This presents no problem in most applications since most MP U and other circuitry is inoperative with Vcc below 1V. However, in applications where RESET must be valid down to 0V, adding a pull-down resistor to RESET causes any stray leakage currents to flow to ground, holding RESET low Figure 2. R1's value is not critical, 100k Ω is large enough not to load RESET and small enough to pull RESET to ground Benefits of Highly Accurate Reset Threshold Most MPU supervisor ICs have reset th reshold voltages between 5% and 10% below the value of nominal supply voltages. This ensures a reset will not occur within 5% of the nominal supply, but will occur when the supply is 10% below nominal. When using ICs rated at only the nominal supply ±5%, this leaves a zone of uncertainty where the supply is between 5% and 10% low, and where the reset may or may not be asserted. The FSP2200-4.63/3.08/2.32 use highly accurate circuitry to ensure that reset is asserted close to the 5% limit, and long before the supply has declined to 10% below nominal. 160 240 320 400 0 1 10 100 1000 Reset Comparator Overdrive, VTH-Vcc
ORDERING INFORMATION MARKING INFORMATION FSP2200XXXX Package: C: SOT23-3L U: SOT323-3L Threshold Voltage: Z: 2.32V R: 2.63V S: 2.93V T: 3.08V J: 4.00V M: 4.38V L: 4.63V Packing: A:Tape & Reel Temperature Grade: L: -40~105℃ E: -40~125℃ 0 9 X Threshold Voltage: L: 4.63V M: 4.38V J: 4.00V T: 3.08V S: 2.93V R: 2.63V Z: 2.32V Part Number: FSP2200
PACKAGE INFORMATION (1) SOT23-3L Dimensions In Millimeters Dimensions In Inches Symbol Min. Max. Min. Max. M1 2.8 3.0 0.112 0.120 M2 0.35 0.5 0.014 0.020 M3 1.3 1.7 0.052 0.068 M4 1.7 2.1 0.068 0.084 F5 0.6 0.024 F6 2.05 2.75 0.082 0.110 F7 0.1 0.004 H8 1.0 1.4 0.040 0.056 H9 0 0.15 0 0.006
(2) SOT323-3L Dimensions In Millimeters Dimensions In Inches Symbol Min. Max. Min. Max. M1 2.0 2.2 0.080 0.088 M2 0.2 0.4 0.008 0.016 M3 1.15 1.35 0.046 0.054 M4 1.2 1.4 0.048 0.056 M5 0.65 0.026 F6 2.15 2.45 0.086 0.098 F7 0.08 0.15 0.003 0.006 F8 0.2 0.4 0.008 0.016 H9 0.9 1.0 0.036 0.040 H10 0 0.1 0 0.004 H11 0.9 1.1 0.036 0.044