G696/G697 Global Mixed-mode Technology Inc. Microprocessor Reset IC Features General Description The G696/G697 are microprocessor (µP) supervisory circuits used to monitor the power supplies in µP and digital systems. They provide excellent circuit reliability and low cost and adjustments when used with +5V, +3.3V, +3.0V- powered circuits. Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages Fully Specified Over Temperature Available in Three Output Configurations Push-Pull RESET Output (G696L) Push-Pull RESET Output (G696H) Open-Drain RESET Output (G697L) Externally Programmable Time Delay Generator 14µA Supply Current Guaranteed Reset Valid to VCC = 0.8V Power Supply Transient Immunity 5 pin SOT-23-5 or TSOT-23-5 Packages 2% Threshold Accuracy These circuits perform a single function: they assert a reset signal whenever the VCC supply voltage declines below a preset threshold, with hysteresis keeping it asserted for time delay determined by externally programmable time delay generator after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The G697L has an open-drain output stage, while the G696 have push-pull outputs. The G697L’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than VCC. The G696L have an active-low RESET output, while the G696H has an active-high RESET output. The reset comparator is designed to ignore fast transients on VCC, and the outputs are guaranteed to be in the correct logic state for VCC down to 0.8V. Applications Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive Low supply current makes the G696/G697 ideal for use in portable equipment. The G696/G697 are available in 5-pin SOT23-5 or TSOT-23-5 packages. Pin Configuration Typical Application Circuit VCC RESET (RESET) 1 5 CD VCC VCC Rpull-up* VCC 2 G696/G697 G696/G697 CD GND 3 4 NC RESET (RESET) GND µP RESET INPUT GND CD SOT-23-5/TSOT-23-5 ()is for G696H *G697 ONLY TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 1 G696/G697 Global Mixed-mode Technology Inc. Ordering Information ORDER NUMBER ORDER NUMBER (Pb free) TEMP. RANGE PACKAGE G696HxxxT1U G696LxxxT1U G696HxxxT1Uf G696LxxxT1Uf -40°C ~ +105°C -40°C ~ +105°C SOT-23-5 SOT-23-5 G697LxxxT1U G696HxxxTOU G697LxxxT1Uf G696HxxxTOUf -40°C ~ +105°C -40°C ~ +105°C SOT-23-5 TSOT-23-5 G696LxxxTOU G697LxxxTOU G696LxxxTOUf G697LxxxTOUf -40°C ~ +105°C -40°C ~ +105°C TSOT-23-5 TSOT-23-5 Note: T1: SOT-23-5 TO: TSOT-23-5 U: Tape & Reel * xxx specifies the threshold voltage. e.g. 263 denotes the 2.64V threshold voltage. Selector Guide ORDER NUMBER ORDER NUMBER (Pb free) RESET THRESHOLD (V) OUTPUT TYPE TOP MARK G697L463T1U G697L463T1Uf 4.60 Open-Drain RESET 697Gx G697L438T1U G697L438T1Uf 4.32 Open-Drain RESET 697Fx G697L400T1U G697L400T1Uf 3.96 Open-Drain RESET 697Ex G697L330T1U G697L330T1Uf 3.30 Open-Drain RESET 697Dx G697L308T1U G697L308T1Uf 3.10 Open-Drain RESET 697Cx G697L293T1U G697L293T1Uf 2.91 Open-Drain RESET 697Bx G697L263T1U G697L263T1Uf 2.64 Open-Drain RESET 697Ax 697Hx G697L250T1U G697L250T1Uf 2.50 Open-Drain RESET G696H463T1U G696H463T1Uf 4.60 Push-Pull RESET 696Lx G696H438T1U G696H400T1U G696H330T1U G696H438T1Uf G696H400T1Uf G696H330T1Uf 4.32 3.96 3.30 Push-Pull RESET Push-Pull RESET Push-Pull RESET 696Kx 696Jx 696Nx G696H308T1U G696H293T1U G696H308T1Uf G696H293T1Uf 3.10 2.91 Push-Pull RESET Push-Pull RESET 696Ix 696Hx G696H263T1U G696H250T1U G696H263T1Uf G696H250T1Uf 2.64 2.50 Push-Pull RESET Push-Pull RESET 696Gx 696Qx G696L463T1U G696L463T1Uf 4.60 Push-Pull RESET 696Fx G696L438T1U G696L438T1Uf 4.32 Push-Pull RESET 696Ex G696L400T1U G696L400T1Uf 3.96 Push-Pull RESET 696Dx G696L330T1U G696L330T1Uf 3.30 Push-Pull RESET 696Mx G696L308T1U G696L308T1Uf 3.10 Push-Pull RESET 696Cx G696L293T1U G696L293T1Uf 2.91 Push-Pull RESET 696Bx G696L263T1U G696L263T1Uf 2.64 Push-Pull RESET 696Ax G696L250T1U G696L250T1Uf 2.50 Push-Pull RESET 696Px T1: SOT-23-5 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 2 Global Mixed-mode Technology Inc. G696/G697 Selector Guide ORDER NUMBER ORDER NUMBER (Pb free) RESET THRESHOLD (V) OUTPUT TYPE TOP MARK G697L463TOU G697L463TOUf 4.60 Open-Drain RESET 697Gx G697L438TOU G697L438TOUf 4.32 Open-Drain RESET 697Fx G697L400TOU G697L400TOUf 3.96 Open-Drain RESET 697Ex G697L330TOU G697L330TOUf 3.30 Open-Drain RESET 697Dx G697L308TOU G697L308TOUf 3.10 Open-Drain RESET 697Cx G697L293TOU G697L293TOUf 2.91 Open-Drain RESET 697Bx G697L263TOU G697L263TOUf 2.64 Open-Drain RESET 697Ax G697L250TOU G697L250TOUf 2.50 Open-Drain RESET 697Hx G696H463TOU G696H438TOU G696H400TOU G696H330TOU G696H463TOUf G696H438TOUf G696H400TOUf G696H330TOUf 4.60 4.32 3.96 3.30 Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET 696Lx 696Kx 696Jx 696Nx G696H308TOU G696H293TOU G696H263TOU G696H308TOUf G696H293TOUf G696H263TOUf 3.10 2.91 2.64 Push-Pull RESET Push-Pull RESET Push-Pull RESET 696Ix 696Hx 696Gx G696H250TOU G696H250TOUf 2.50 Push-Pull RESET 696Qx G696L463TOU G696L463TOUf 4.60 Push-Pull RESET 696Fx 696Ex G696L438TOU G696L438TOUf 4.32 Push-Pull RESET G696L400TOU G696L400TOUf 3.96 Push-Pull RESET 696Dx G696L330TOU G696L330TOUf 3.30 Push-Pull RESET 696Mx G696L308TOU G696L308TOUf 3.10 Push-Pull RESET 696Cx G696L293TOU G696L293TOUf 2.91 Push-Pull RESET 696Bx G696L263TOU G696L263TOUf 2.64 Push-Pull RESET 696Ax G696L250TOU G696L250TOUf 2.50 Push-Pull RESET 696Px TO: TSOT-23-5 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 3 Global Mixed-mode Technology Inc. G696/G697 Absolute Maximum Ratings Terminal Voltage (with respect to GND) VCC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.0V Delay Capacitor Pin Voltage, VCD. . -0.3 to (VCC +0.3V) RESET, RESET (push-pull) . . . . .-0.3V to (VCC + 0.3V) Output Current, RESET, RESET . . . . . . . . . . . 20mA Operating Temperature Range. . . . . .-40°C to +105°C Storage Temperature Range . . . . . . .-65°C to +150°C Reflow Temperature (soldering, 10sec) . . . .. . . 260°C RESET (open drain). . . . . . . . . . . . . . . -0.3V to +6.0V Input Current, VCC . . . . . . . . . . . . . . . . . . . . . . . 20mA Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Electrical Characteristics (VCC = full range, TA = -40°C to +105°C, unless otherwise noted. Typical values are at TA = +25°C, VCC = 5V for 463/438/400/330 versions, VCC= 3.3V for 308/293 versions, and VCC = 3V for 263/250 version.) (Note 1) PARAMETER SYMBOL VCC Range Supply Current (SOT-23-5) Reset Threshold Reset Threshold Hysterisis Reset Threshold Tempco CD Delay Pin Threshold Voltage Delay Capacitor Pin Sink Current Delay Capacitor Pin Source Current RESET Output Current Low (push-pull active low, and open-drain active-low, G696L and G697L) RESET Output Current High (push-pull active low, G696L) RESET Output Current Low (push-pull active high, G696H) RESET Output Current High (push-pull active high, G696H) ICC VTH- CONDITION UNIT 0.8 --- 5.5 1 --- --16.5 5.5 25 VCC<3.6V, G69_ _308/293/263/250_ G69_ _463_ --4.50 13.9 4.6 22 4.69 G69_ _438_ G69_ _400_ 4.23 3.88 4.32 3.96 4.40 4.04 G69_ _330_ G69_ _308_ 3.25 3.04 3.3 3.10 3.37 3.16 G69_ _293_ 2.86 2.91 2.96 G69_ _263_ 2.59 2.64 2.69 G69_ _250_ 2.45 3.6 --0.87 3 0.5 2.5 5.3 70 1.25 5 0.88 2.55 7 --1.29 --1.2 % ppm/°C V mA µA 8 --- --- mA 4.5 --- --- mA 3 --- --- --- 2 --- --- --- 16 --- --- mA 12 --- --- --- 10 --- --- --- 2 --- --- mA --- --- 1 µA ICD VCC = 1.5V, VCD = 0.5V VCC > VTH- + VHYS IOL VCC = 2.5V, V RESET = 0.5V IOH MAX TA = -40°C +105°C VCC<5.5V, G69_ _463/438/400/330_ VTDC IOL TYP TA = 0°C +70°C VHYS IOH MIN VCC = 5V, V RESET = 4.5V, G696L463/438/400/330 VCC = 3.3V, V RESET = 2.8V, G696L308/293 VCC = 3V, V RESET = 2.5V, G696L263/250 VCC = 5V, VRESET = 0.5V, G696H463/438/400/330 VCC = 3.3V, VRESET = 0.5V, G696H308/293 VCC = 3V, VRESET = 0.5V, G696H263/250 VCC = 2.5V, VRESET = 2V RESET Open-Drain Output Leakage CurVCC > VTH, RESET deasserted rent (G697L) Note 1: Production testing done at TA = +25°C; limits over temperature guaranteed by design. V µA V TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 4 G696/G697 Global Mixed-mode Technology Inc. Typical Operating Characteristics (VCC = full range, TA = -40°C to +105°C, unless otherwise noted. Typical values are at TA = +25°C, VCC = 5V for 463/438/400/330 versions, VCC= 3.3V for 308/293 versions, and VCC = 3V for 263/250 version.) Supply Current vs. VCC Supply Curremt vs. Temperature (No Load) 8 7 7 6 5 4 3 2 0 0.6 1 1.2 1.5 1.8 2.1 2.4 2.7 3 3.2 3.3 3.4 3.5 3.7 3.9 4 4.5 5 5.5 6 2 VCC (V) 20 40 Temperature (°C) Normalized Reset Threshold vs. Temperature CD Delay Pin Sink Current vs. Voltage -20 1.05 60 80 35 I CD, CD Delay Pin Sink Current (mA) V TH+ 1.04 1.03 1.02 V T H- 1.01 1 0.99 0.98 0.97 30 V CC=3V 25 20 V CC=2.5V 15 10 V CC=1.5V 5 0.96 0 -40 -30 -20 -10 0 10 20 27 30 40 50 60 70 80 90 0.05 TA , Ambient Temperature ( °C) 0.2 0.4 0.6 1.2 1.8 V CD, Delay Pin Voltage (V) 2.4 3 Output Time Delay vs. Capacitance (VCC <VTH to output change) Output Time Delay vs. Capacitance (VCC>VTH to output change) 10000 10000 1000 1000 Output Time Delay ( µ S) Output Time Delay(mS) 0 40 1.06 (V) V CC=2.5V 3 0 -40 0 TH- 4 1 1 Normalized Ormalized VTH+ , V V CC=3.3V 5 Supply Current (µA) Supply Current (µA) 6 V CC=5V 100 10 1 100 10 1 0.1 0.1 0.0001 0.001 0.01 0.1 0.0001 1 CD, Delay Pin Capacitance ( µF) 0.001 0.01 0.1 1 CD, Delay Pin Capacitance ( µF) TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 5 Global Mixed-mode Technology Inc. G696/G697 Typical Operating Characteristics (continued) Reset Output Time Delay vs. Temperature 300 Output Time Delay (ms) 250 200 CD=0.1µF 150 100 50 0 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 TA , Ambient Temperature ( °C) Recommended Minimum Footprint SOT-23-5 / TSOT-23-5 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 6 G696/G697 Global Mixed-mode Technology Inc. Timing Diagram V CC V TH + V TH - V C C , P in 2 V CC C D , P in 5 0 .6 7 5 V IN R e se t O u tp u t (A ctiv e L ow ), P in 1 V TH - V CC 0V V CC R e se t O u tp u t (A ctiv e H ig h ), P in 1 V TH 0V tD 2 Figure 1 Functional Diagram 2 VCC 2 ICD + * RESET ICD 1 VTH 3 GND 5 () is for G696H 1 VCC RESET (RESET) + VTH 3 CD GND 5 CD Figure 2 TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 7 G696/G697 Global Mixed-mode Technology Inc. Pin Description PIN NAME RESET (G696L/G697L) 1 RESET (G696H) 2 3 4 5 VCC GND NC CD FUNCTION RESET Output remains low while VCC is below the reset threshold, and for delay time set by CD after VCC rises above the reset threshold. RESET Output remains high while VCC is below the reset threshold, and for delay time set by CD after VCC rises above the reset threshold. Supply Voltage (+5V, +3.3V, +3.0V) Ground No Connection. External Programmable time delay is set by the capacitor connect to CD pin. Detailed Description A microprocessor’s (µP’s) reset input starts the µP in a known state. The G697L/G696L/G696H assert 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 threshold (VTH-), keeping it asserted for time delay set by capacitor connected to CD pin, after VCC has risen above the high reset threshold VTH+ (VTH-+VHYS). The G697L uses an open-drain output, and the G696L/G696H have a push-pull output stage. Connect a pull-up resistor on the G697L’s RESET output to any supply between 0 and 5.5V. 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 4). R1’s value is not critical; 100kΩ is large enough not to load RESET and small enough to pull RESET to ground. A 100kΩ pull-up resistor to VCC is also recommended for the G697L if RESET is required to remain valid for VCC < 0.8V. VCC The time delay is set by external capacitor CD, and internal pull up current ICD. When the voltage at CD pin exceeds the buffer threshold, typically 1.25V, the RESET output high (RESET output low). The voltage detector and buffer have built-in hysterisis to prevent erratic reset operation. The formula of time delay is T (ms) ≅ 1685 CD (µF). Fig1 and Fig2 show a timing deagram and a Functional Block. VCC VCC RPULL-UP µP G697 RESET MOTOROLA INPUT 68HCXX RESET GND GND VCC Figure 4. Interfacing to µPs with Bidirectional Reset I/O G696 RESET +5.0 +5.0V GND R1 100k +3.3V VCC VCC RPULL-UP 5V SYSTEM G697 Figure3. RESET Valid to VCC = Ground Circuit RESET Ensuring a Valid Reset Output Down to VCC = 0 When VCC falls below 0.8V, the G696 RESET output no longer sinks current-it becomes an open circuit. Therefore, high-impedance CMOS logic inputs connected to RESET can drift to undetermined voltages. This presents no problem in most applications since most µP and other circuitry is inoperative with VCC below 0.8V. However, in applications where RESET GND RESET INPUT GND Figure 5. G697L Open-Drain RESET Output Allows Use with Multiple Supplies TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 8 Global Mixed-mode Technology Inc. Interfacing to µPs with Bidirectional Reset Pins Since the RESET output on the G697L is open drain, this device interfaces easily with µPs that have bidirectional reset pins, such as the Motorola 68HC11. Connecting the µP supervisor’s RESET output directly to G696/G697 high as VCC decays toward 0. The voltage where this occurs depends on the pull-up resistor value and the voltage to which it is connected. Benefits of Highly Accurate Reset Threshold Most µP supervisor ICs have reset threshold 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. the microcontroller’s (µC’s) RESET pin with a single pull-up resistor allows either device to assert reset (Figure 5). G697L Open-Drain RESET Output Allows Use with Multiple Supplies Generally, the pull-up connected to the G697L will connect to the supply voltage that is being monitored at the IC’s VCC pin. However, some systems may use the open-drain output to level-shift from the monitored supply to reset circuitry powered by some other supply (Figure 6). Note that as the G697L’s VCC decreases below 1V, so does the IC’s ability to sink current at RESET . Also, with any pull-up, RESET will be pulled 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 G69_ _463/G69_ _308 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. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 9 G696/G697 Global Mixed-mode Technology Inc. Package Information C D L E H θ1 e1 e A A2 A1 b SOT-23-5 (T1) Package 1. 2. 3. 4. Note: Package body sizes exclude mold flash protrusions or gate burrs Tolerance ±0.1000 mm (4mil) unless otherwise specified Coplanarity: 0.1000mm Dimension L is measured in gage plane MIN. DIMENSION IN MM NOM. MAX. MIN. DIMENSION IN INCH NOM. A 1.00 1.10 1.30 0.039 0.043 0.051 A1 A2 0.00 0.70 ----0.80 0.10 0.90 0.000 0.028 ----0.031 0.004 0.035 b C 0.35 0.10 0.40 0.15 0.50 0.25 0.014 0.004 0.016 0.006 0.020 0.010 D E e e1 H L θ1 2.70 1.40 --------2.60 0.37 2.90 1.60 1.90(TYP) 0.95 2.80 ------ 3.10 1.80 --------3.00 ----- 0.106 0.055 --------0.102 0.015 0.114 0.063 0.075(TYP) 0.037 0.110 ----- 0.122 0.071 --------0.118 ----- 1° 5° 9° 1° 5° 9° SYMBOL MAX. 5. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 10 G696/G697 Global Mixed-mode Technology Inc. C D L H E θ1 e1 e A A2 A1 b TSOT-23-5 (TO) Package Note: 6. Package body sizes exclude mold flash protrusions or gate burrs 7. Tolerance ±0.1000 mm (4mil) unless otherwise specified 8. Coplanarity: 0.1000mm 9. Dimension L is measured in gage plane MIN. DIMENSION IN MM NOM. MAX. MIN. DIMENSION IN INCH NOM. A ----- ----- 1.00 ----- ----- 0.039 A1 A2 b C D E e 0.00 ----0.35 0.10 2.70 1.40 ----- --------0.40 0.15 2.90 1.60 1.90(TYP) 0.10 0.90 0.50 0.25 3.10 1.80 ----- 0.000 ----0.014 0.004 0.106 0.055 ----- --------0.016 0.006 0.114 0.063 0.075(TYP) 0.004 0.035 0.020 0.010 0.122 0.071 ----- e1 H L θ1 ----2.60 0.37 0.95 2.80 ------ ----3.00 ----- ----0.102 0.015 0.037 0.110 ----- ----0.118 ----- 1° 5° 9° 1° 5° 9° SYMBOL MAX. Taping Specification PACKAGE Q’TY/REEL SOT-23-5 TSOT-23-5 3,000 ea 3,000 ea Feed Direction TSOT-23-5、SOT-23-5 Package Orientation GMT Inc. does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and GMT Inc. reserves the right at any time without notice to change said circuitry and specifications. TEL: 886-3-5788833 http://www.gmt.com.tw Ver: 1.8 May 10, 2006 11