G698 GMT | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 8
Technical content
Features
Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages Fully Specified Over Temperature Available in Three Output Configurations Push-Pull RESET Output (G698L) Push-Pull RESET Output (G698H) Open-Drain RESET Output (G699L) Externally Programmable Time Delay Generator 14µA Supply Current Guaranteed Reset Valid to VCC = 0.8V Power Supply Transient Immunity 5 pin SOT23-5 Packages 2% Threshold Accuracy
Applications
Computers Controllers Intelligent Instruments Critical µP and µC Power Monitoring Portable / Battery-Powered Equipment Automotive General Description The G698/G699 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. These circuits perform a single function: they assert a reset signal whenever the V CC supply voltage declines below a preset threshold, with hysteresis keeping it asserted for time delay determined by externally pro- grammable time delay generator after V CC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of supply voltages are available. The G699L has an open-drain output stage, while the G698 have push-pull outputs. The G699L’s open-drain RESET output requires a pull-up resistor that can be connected to a voltage higher than V CC. The G698L have an active-low RESET output, while the G698H has an active-high RESET output. The reset com- parator is designed to ignore fast transients on V CC, and the outputs are guaranteed to be in the correct logic state for V CC down to 0.8V. Low supply current makes the G698/G699 ideal for use in portable equipment. The G698/G699 are avail- able in 5-pin SOT23-5 packages.
Ordering Information
ORDER NUMBER TEMP. RANGE PACKAGE G698H(L)xxxT1U -40°C ~ + 105°C SOT23-5 G699LxxxT1U -40°C ~ + 105°C SOT23-5 Note:T1 : SOT23-5 U : Tape & Reel * xxx specifies the threshold voltage. e.g. 263 denotes the 2.63V threshold voltage. P i n C o n f i g u r a t i o n T y p i c a l A p p l i c a t i o n C i r c u i t SOT23-5 G698/G699 RESET (RESET) 43GND ()is for G698H *G699 ONLY RESET INPUT GND µP VCC RESET (RESET) GND G698/G699 VCC CD VCC CD Rpull-up* CD VCC GND SOT23-5 G698/G699 RESET (RESET) 43GND ()is for G698H *G699 ONLY RESET INPUT GND µP VCC RESET (RESET) GND G698/G699 VCC CD VCC CD Rpull-up* CD VCC GND
Ver: 1.3 Jun 03, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G698/G699 Global Mixed-mode Technology Inc. Absolute Maximum Ratings Terminal Voltage (with respect to GND) Delay Capacitor Pin Voltage, VCD…..-0.3 to (V CC +0.3V) Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23-5 (derate 2.17mW/°C above +70°C).174mW Lead Temperature (soldering, 10s).….….………+260°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress rat- ings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational se ctions 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 versions, VCC= 3.3V for 308/293 versions, and VCC = 3V for 263 version.) (Note 1) PARAMETER SYMBOL CONDITION MIN TYP MAX UNIT TA = 0°C +70°C 0.8 --- 5.5 VCC Range VCC<5.5V, G69_ _463/438/400/330_ --- 16.5 25 Supply Current (SOT23-5) I CC VCC<3.6V, G69_ _308/293/263_ --- 13.9 22 µA G69_ _463_ 4.50 4.60 4.69 G69_ _438_ 4.23 4.32 4.40 G69_ _400_ 3.88 3.96 4.04 G69_ _330_ 3.25 3.30 3.37 G69_ _308_ 3.04 3.10 3.16 G69_ _293_ 2.86 2.91 2.96 Reset Threshold V TH- G69_ _263_ 2.59 2.64 2.69 V Reset Threshold Hysterisis V HYS 3.6 5.3 7 % Reset Threshold Tempco --- 70 --- ppm/°C CD Delay Pin Threshold Voltage V TDC 0.87 1.25 1.29 V Delay Capacitor Pin Sink Current V CC = 1.5V, VCD = 0.5V 3 5 --- mA Delay Capacitor Pin Source Current ICD VCC > VTH- + VHYS 0.5 0.88 1.2 µA RESET Output Current Low (push-pull active low, and open-drain active-low, G698L and G699L) IOL VCC = 2.5V, V RESET = 0.5V 8 --- --- mA VCC = 5V, V RESET = 4.5V, VCC = 3.3V, V RESET = 2.8V, G698L308/293 3 --- --- RESET Output Current High (push-pull active low, G698L) IOH VCC = 3V, V RESET = 2.5V, G698L263 2 --- --- mA VCC = 5V, VRESET = 0.5V, VCC = 3.3V, VRESET = 0.5V, G698H308/293 12 --- --- RESET Output Current Low (push-pull active high, G698H) IOL VCC = 3V, VRESET = 0.5V, mA RESET Output Current High (push-pull active high, G698H) IOH V CC = 2.5V, VRESET = 2V 2 --- --- mA RESET Open-Drain Output Leakage Current (G699L) VCC > VTH, RESET deasserted --- --- 1 µA Note 1: Production testing done at TA = +25°C; limits over temperature guaranteed by design.
Ver: 1.3 Jun 03, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G698/G699 Global Mixed-mode Technology Inc. Selector Guide PART/SUFFIX RESET THRESHOLD (V) OUTPUT TYPE TOP MARK G699L463T1U 4.60 Open-DrainRESET 699Gx G699L438T1U 4.32 Open-DrainRESET 699Fx G699L400T1U 3.96 Open-DrainRESET 699Ex G699L330T1U 3.30 Open-DrainRESET 699Dx G699L308T1U 3.10 Open-DrainRESET 699Cx G699L293T1U 2.91 Open-DrainRESET 699Bx G699L263T1U 2.64 Open-Drain RESET 699Ax G698H463T1U 4.60 Push-Pull RESET 698Lx G698H438T1U 4.32 Push-Pull RESET 698Kx G698H400T1U 3.96 Push-Pull RESET 698Jx G698H330T1U 3.30 Push-Pull RESET 698Nx G698H308T1U 3.10 Push-Pull RESET 698Ix G698H293T1U 2.91 Push-Pull RESET 698Hx G698H263T1U 2.64 Push-Pull RESET 698Gx G698L463T1U 4.60 Push-Pull RESET 698Fx G698L438T1U 4.32 Push-Pull RESET 698Ex G698L400T1U 3.96 Push-Pull RESET 698Dx G698L330T1U 3.30 Push-Pull RESET 698Mx G698L308T1U 3.10 Push-Pull RESET 698Cx G698L293T1U 2.91 Push-Pull RESET 698Bx G698L263T1U 2.64 Push-Pull RESET 698Ax
Ver: 1.3 Jun 03, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G698/G699 Global Mixed-mode Technology Inc. Typical Operating Characteristics (VCC = full range, T A = -40°C to +105°C, unless otherwise noted. Typical values are at T A = +25°C, V CC = 5V for 463/438/400/330 versions, VCC= 3.3V for 308/293 versions, and VCC = 3V for 263 version.) CD Delay Pin Sink Current vs. Voltage VCD, Delay Pin Voltage (V) ICD, CD DELAY PIN SINK CURRENT (mA) VCC=3V VCC=2.5V VCC=1.5V Output Time Delay vs. Capacitance 0.1 100 1000 10000 0.0001 0.001 0.01 0.1 1 CD, Delay Pin Capacitance (µF) Output Time Delay Delay between VCC>VTH to output change Delay between VCC<VTH to output change Supply Current vs. VCC VCC (V) Supply Current (µA) Reset Output Time Delay vs. Temperature 100 150 200 250 300 - 4 0 - 3 0 - 2 0 - 1 0 0 1 02 03 04 05 06 07 08 09 0 TA, Ambient Temperature (°C) Output Time Delay (ms) CD=0.1µF Normalized Reset Threshold vs. Temperature 0.96 0.97 0.98 0.99 1.01 1.02 1.03 1.04 1.05 1.06 - 4 0 - 3 0 - 2 0 - 1 00 1 02 02 73 04 05 06 07 08 09 0 TA, Ambient Temperature (°C) Normalized Ormalized V TH+, VTH- (V) VT VTH Supply Curremt vs. Temperature (No Load) - 4 0 - 2 00 2 04 06 08 0 Temperature (°C) Supply Current (µA) VCC=5V VCC=3.3V VCC=2.5V
Ver: 1.3 Jun 03, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G698/G699 Global Mixed-mode Technology Inc. Timing Diagram Figure 1 Functional Diagram Figure 2 VCC VTH+ VTH- VCC VCC VCC VTH- VTH- tD2 VCC, Pin 5 CD, Pin 1 0.675 V IN Reset Output (Active Low), Pin 4 Reset Output (Active High), Pin 4 VCC VTH+ VTH- VCC VCC VCC VTH- VTH- tD2 VCC, Pin 5 CD, Pin 1 0.675 V IN Reset Output (Active Low), Pin 4 Reset Output (Active High), Pin 4 () is for G698H
2 VCC
(RESET) 3G N D 5C D ICD ICD () is for G698H (RESET) 3G N D 5C D ICD ICD
Ver: 1.3 Jun 03, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G698/G699 Global Mixed-mode Technology Inc. Pin Description PIN NAME FUNCTION 1 CD External Programmable time delay is set by the capacitor connect to C D pin.
2.3 GND Ground
RESET (G698L/G699L) RESET Output remains low while VCC is below the reset threshold, and for delay time set by C D after VCC rises above the reset threshold. 4 RESET (G698H) RESET Output remains high while V CC is below the reset threshold, and for delay time set by CD after VCC rises above the reset threshold. 5 VCC Supply Voltage (+5V, +3.3V, +3.0V) Detailed Description A microprocessor’s (µP’s) reset input starts the µP in a known state. The G699L/G698L/G698H assert reset to prevent code-execution errors during power-up, power-down, or brownout conditions. They assert a reset signal whenever the V CC supply voltage declines below a preset threshold (VTH-), keeping it asserted for time delay set by capacitor connected to C D pin, after VCC has risen above the high reset threshold V TH+ (VTH-+VHYS). The G699L uses an open-drain output, and the G698L/G698H have a push-pull output stage. Connect a pull-up resistor on the G699L’s RESET out- put to any supply between 0 and 5.5V. The time delay is set by external capacitor C D, and internal pull up current I CD. When the voltage at C D pin exceeds the buffer threshold, typically 1.25V, the RESET output high (R ESET output low). The volt- age detector and buffer have built-in hysterisis to prevent erratic reset operation. The formula of time delay is T (ms) ≅ 1685 C D (µF). Fig1 and Fig2 show a timing deagram and a Functional Block. Ensuring a Valid Reset Output Down to VCC = 0 When VCC falls below 0.8V, the G698 RESET output no longer sinks current—it becomes an open circuit. Therefore, high-impedance CMOS logic inputs con- nected 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 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 3). R1’s value is not critical; 100k Ω is large enough not to load RESET and small enough to pull RESET to ground. A 100kΩ pull-up resistor to V CC is also recommended for the G699L if RESET is required to remain valid for VCC < 0.8V. Figure3. RESET Valid to VCC = Ground Circuit VCC RESET GND G698 100k VCC RESET GND G698 100k
Ver: 1.3 Jun 03, 2004 TEL: 886-3-5788833 http://www.gmt.com.tw G698/G699 Global Mixed-mode Technology Inc.
Package Information
Note: 1. Package body sizes exclude mold flash protrusions or gate burrs 2. Tolerance ±0.1000 mm (4mil) unless otherwise specified 3. Coplanarity: 0.1000mm 4. Dimension L is measured in gage plane DIMENSIONS IN MILLIMETER SYMBOL MIN NOM MAX A 1.00 1.10 1.30 A1 0.00 ----- 0.10 A2 0.70 0.80 0.90 b 0.35 0.40 0.50 C 0.10 0.15 0.25 D 2.70 2.90 3.10 E 1.40 1.60 1.80 H 2.60 2.80 3.00 θ1 1º 5º 9º Taping Specification 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. E e D H L C b A E e D H L C b A Feed Direction Feed Direction