GS810C

GS809C and GS810C New Product Vishay formerly General Semiconductor Microprocessor Reset Monitors Pin Configuration SOT-23 (Top View) GND 1 3 Reset Output 2 Vcc Description • The GS809C and 810C are system supervisor circuits designed to monitor VCC in digital systems and provide a reset signal to the host processor when necessary. No external components are required. • When the processor power supply voltage drops below the reset threshold, the reset output is driven active, in less than 40µs (TD1). Reset is maintained active for a time period (TD2), after the Vcc rises above the threshold voltage. • To prevent jitter, the reset threshold voltage has a built-in hysteresis of 0.4% of VTH. • The GS809C has an active-low reset output, while the GS810C has an active-high reset output. Both devices have push/pull output drives. • The reset signal is guaranteed valid, down to Vcc = 1.0V. Fig. 1 – Typical Application Diagram VCC VCC GS809C Reset VCC Processor Reset Input GND • Low supply current of 3µA makes these devices well suited for battery powered applications. They are designed to reject fast transients from causing false resets. • Both devices are available in a space-saving SOT-23 package. GND Applications • Computers • Battery Powered Equipment • Critical uProcessor and uController power supply monitoring Features • Tight reset voltage tolerances ± 1.5% • 4 reset active timeout period options • Low quiescent current: < 3µA • 9 reset threshold options from 2.1V to 4.63V • Reset output guaranteed down to 1.0V • No external components • Vcc Transient immunity • Wide temperature range –40°C to +85°C Document Number 74808 01-Nov-02 www.vishay.com 1 GS809C and GS810C Vishay formerly General Semiconductor Ordering Information Reset Active Low GS809CxxEUx GS810CxxEUx Reset Active High Reset Timeout Period Default: 210mS E: 150mS D: 30mS A : 1.5mS Reset Voltage Options L M J T S 27 R 24 21 Vth = 4.63V Vth = 4.38V Vth = 4.0V Vth = 3.08V Vth = 2.93V Vth = 2.7V Vth = 2.63V Vth = 2.4V Vth = 2.1V Marking Information X XX XX Date Code Year -- Week Threshold Voltage 26: 2.63V 38: 3.8V 46: 4.63V Etc. No letters A: D: E: G: GS809C, 1.5mS GS809C, 30.0mS GS809C, 150.0mS GS809C, 210.0mS L: Q: R: S: GS810C, 1.5mS GS810C, 30.0mS GS810C, 150.0mS GS810C, 210.0mS www.vishay.com 2 Document Number 74808 01-Nov-02 GS809C and GS810C Vishay formerly General Semiconductor Absolute Maximum Ratings (1) Parameter Supply Voltage Reset/Reset Input Current, Vcc Output Current, Reset/Reset dV/dT (Vcc) Operating Temperature Range Storage Temperature Range Power Dissipation (TA ≤ 70°C) SOT-23 (Derate 4mW/°C above 70°C) TA Tstg PD Symbol Vcc Value 6.0 –0.3 to (Vcc + 0.3) 20 20 100 –40 to +85 –65 to +150 260 Unit V V mA mA V/µS °C °C mW Note: (1) Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Electrical Characteristics Parameter Vcc Range TA = 25°C unless otherwise noted. Symbol VRANGE Test Conditions Min 1 Typ – – – – VTHNOM VTHNOM 0.4 Max 5.5 5.5 3.0 5.0 VTHNOM+1.5% VTHNOM+2.0% Unit V µA TA = –40 to +85°C Supply Current ICC Vcc = 3.0V Vcc=3.0V, TA= –40 to +85°C Reset Threshold Threshold Hysteresis Reset Threshold Temperature Coefficient Reset Output Voltage Low 809C/810C 809C Vcc < VTH min 810C Vcc > VTH max TA = –40 to +85°C ISINK = 1.2mA 809C Vcc > VTH max 810C Vcc < VTH min TA = –40 to +85°C ISOURCE = 0.5mA VCC = VTH – 100mV TA = –40 to +85°C TA = –40 to +85°C VTH TA = –40 to +85°C VTH HIST 1 – – VTHNOM–1.5% VTHNOM–2.0% V %VTH – 30 – ppm/°C VOL – – 0.5 V Reset Output Voltage High 809C/810C VOH 0.8VCC – – V VCC to Reset Delay Reset Timeout Period TD1 TD2 – TD2NOM–35% 40 TD2NOM – TD2NOM+35% µS mS Document Number 74808 01-Nov-02 www.vishay.com 3 GS809C and GS810C Vishay formerly General Semiconductor Ratings and Characteristic Curves (T Fig. 2 – Timing Diagram A = 25°C unless otherwise noted) VTH VTH VCC TD2 Reset 50% TD1 50% TD2 Reset 50% TD1 50% Fig. 3 – Transient Rejection Supply (VCC) Transients Transient Duration (µS) 140 120 100 80 60 40 20 0 0.01 These devices have a certain immunity to fast negative going transients. The graph titled “Transient Rejection” shows the maximum allowable transient amplitude and duration to avoid triggering an unintended reset. As shown in the graph shorter transients can have larger amplitudes without triggering resets. 0.1 1 Transient Amplitude (V) www.vishay.com 4 Document Number 74808 01-Nov-02 GS809C and GS810C Vishay formerly General Semiconductor Ratings and Characteristic Curves (T 220 A = 25°C unless otherwise noted) Fig. 4 – Reset Time vs. Temperature 2.35 Fig. 5 – ICC vs. Temperature 215 210 205 GS809CREU Supply Current @5V (µA) 2.30 Reset Time (mS) 2.25 GS809CREU 2.20 200 195 2.15 190 --50 --20 10 40 70 100 130 2.10 --50 --20 10 40 70 100 130 Temperature (°C) Temperature (°C) Fig. 6 – Reset Vth vs. Temperature 2.650 2.648 2.646 2.644 1.6 85°C 2 Fig. 7 – ICC vs. VCC Reset Vth (V) 40°C 2.640 2.638 2.636 2.634 2.632 2.630 --50 --20 GS809CREU I CC (µA) 2.642 1.2 0°C 0.8 0.4 0 10 40 70 100 130 0 1 2 3 4 5 Temperature (°C) VCC (V) Fig. 8 – TD1 Delay vs. Temperature 43 42 TD1 Delay (µS) 41 40 39 38 37 --40 --20 0 20 40 60 80 100 Temperature (°C) Document Number 74808 01-Nov-02 www.vishay.com 5 GS809C and GS810C Vishay formerly General Semiconductor Ratings and Characteristic Curves (T A = 25°C unless otherwise noted) Fig. 9 – Threshold Hysteresis vs. Temperature 0.5 0.265 0.260 Fig. 10 – Reset VOL vs. Temperature Reset VOL @0.8mA (V) 0.4 0.255 0.250 0.245 0.240 Hysteresis (% of VTH) 0.3 0.2 GS809CREU 0.235 0.230 0.225 0.1 0 --40 0.220 --20 0 20 40 60 80 100 --50 --20 10 40 70 100 130 Temperature (°C) Temperature (°C) SOT-23 Case Outline 3.10 2.70 Top View Mounting Pad Layout 0.031 (0.8) 3 1.80 1.40 3.00 2.60 0.035 (0.9) 1 1.90 (TYP.) 2 Dimensions in millimeters 0.079 (2.0) 1.40 1.00 1.25 0.70 0.50 0.35 0.25 0.10 θ1 9° 1° 0.037 (0.95) 0.037 (0.95) 0.15 0.55 0.35 www.vishay.com 6 Document Number 74808 01-Nov-02