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Global Mixed-mode Technology Inc.
G696/G697
Microprocessor Reset IC
Features
Precision Monitoring of +3V, +3.3V, and +5V Power-Supply Voltages
General Description
The G696/G697 are microprocessor (P) supervisory circuits used to monitor the power supplies in P 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 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.
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 14A 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
Applications
Computers Controllers Intelligent Instruments Critical P and C 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 Rpull-up* VCC
VCC
2
G696/G697
G696/G697
CD RESET (RESET) GND CD
P
RESET INPUT GND
GND
3
4
NC
SOT-23-5/TSOT-23-5
()is for G696H *G697 ONLY
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Ordering Information
ORDER NUMBER
G696HxxxT1U G696LxxxT1U G697LxxxT1U G696HxxxTOU G696LxxxTOU G697LxxxTOU
G696/G697
PACKAGE
SOT-23-5 SOT-23-5 SOT-23-5 TSOT-23-5 TSOT-23-5 TSOT-23-5
ORDER NUMBER (Pb free)
G696HxxxT1Uf G696LxxxT1Uf G697LxxxT1Uf G696HxxxTOUf G696LxxxTOUf G697LxxxTOUf
TEMP. RANGE
-40C ~ +105C -40C ~ +105C -40C ~ +105C -40C ~ +105C -40C ~ +105C -40C ~ +105C
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
G697L463T1U G697L438T1U G697L400T1U G697L330T1U G697L308T1U G697L293T1U G697L263T1U G697L250T1U G696H463T1U G696H438T1U G696H400T1U G696H330T1U G696H308T1U G696H293T1U G696H263T1U G696H250T1U G696L463T1U G696L438T1U G696L400T1U G696L330T1U G696L308T1U G696L293T1U G696L263T1U G696L250T1U T1: SOT-23-5
ORDER NUMBER (Pb free)
G697L463T1Uf G697L438T1Uf G697L400T1Uf G697L330T1Uf G697L308T1Uf G697L293T1Uf G697L263T1Uf G697L250T1Uf G696H463T1Uf G696H438T1Uf G696H400T1Uf G696H330T1Uf G696H308T1Uf G696H293T1Uf G696H263T1Uf G696H250T1Uf G696L463T1Uf G696L438T1Uf G696L400T1Uf G696L330T1Uf G696L308T1Uf G696L293T1Uf G696L263T1Uf G696L250T1Uf
RESET THRESHOLD (V)
4.60 4.32 3.96 3.30 3.10 2.91 2.64 2.50 4.60 4.32 3.96 3.30 3.10 2.91 2.64 2.50 4.60 4.32 3.96 3.30 3.10 2.91 2.64 2.50
OUTPUT TYPE
Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET
TOP MARK
697Gx 697Fx 697Ex 697Dx 697Cx 697Bx 697Ax 697Hx 696Lx 696Kx 696Jx 696Nx 696Ix 696Hx 696Gx 696Qx 696Fx 696Ex 696Dx 696Mx 696Cx 696Bx 696Ax 696Px
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Selector Guide
ORDER NUMBER
G697L463TOU G697L438TOU G697L400TOU G697L330TOU G697L308TOU G697L293TOU G697L263TOU G697L250TOU G696H463TOU G696H438TOU G696H400TOU G696H330TOU G696H308TOU G696H293TOU G696H263TOU G696H250TOU G696L463TOU G696L438TOU G696L400TOU G696L330TOU G696L308TOU G696L293TOU G696L263TOU G696L250TOU TO: TSOT-23-5
G696/G697
OUTPUT TYPE TOP MARK
697Gx 697Fx 697Ex 697Dx 697Cx 697Bx 697Ax 697Hx 696Lx 696Kx 696Jx 696Nx 696Ix 696Hx 696Gx 696Qx 696Fx 696Ex 696Dx 696Mx 696Cx 696Bx 696Ax 696Px
ORDER NUMBER (Pb free)
G697L463TOUf G697L438TOUf G697L400TOUf G697L330TOUf G697L308TOUf G697L293TOUf G697L263TOUf G697L250TOUf G696H463TOUf G696H438TOUf G696H400TOUf G696H330TOUf G696H308TOUf G696H293TOUf G696H263TOUf G696H250TOUf G696L463TOUf G696L438TOUf G696L400TOUf G696L330TOUf G696L308TOUf G696L293TOUf G696L263TOUf G696L250TOUf
RESET THRESHOLD (V)
4.60 4.32 3.96 3.30 3.10 2.91 2.64 2.50 4.60 4.32 3.96 3.30 3.10 2.91 2.64 2.50 4.60 4.32 3.96 3.30 3.10 2.91 2.64 2.50
Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Open-Drain RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET Push-Pull RESET
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
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) RESET (open drain). . . . . . . . . . . . . . . -0.3V to +6.0V Input Current, VCC . . . . . . . . . . . . . . . . . . . . . . . 20mA
G696/G697
Output Current, RESET, RESET . . . . . . . . . . . 20mA Operating Temperature Range. . . . . .-40C to +105C Storage Temperature Range . . . . . . .-65C to +150C Reflow Temperature (soldering, 10sec) . . . .. . . 260C
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 = -40C to +105C, unless otherwise noted. Typical values are at TA = +25C, 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
VCC Range Supply Current (SOT-23-5) ICC
SYMBOL
CONDITION
TA = 0C +70C TA = -40C +105C VCC<5.5V, G69_ _463/438/400/330_ VCC<3.6V, G69_ _308/293/263/250_ G69_ _463_ G69_ _438_ G69_ _400_
MIN
0.8 1 ----4.50 4.23 3.88 3.25 3.04 2.86 2.59 2.45 3.6 --0.87 3 0.5 8 4.5 3 2 16 12 10 2 ---
TYP
----16.5 13.9 4.6 4.32 3.96 3.3 3.10 2.91 2.64 2.5 5.3 70 1.25 5 0.88 -------------------
MAX
5.5 5.5 25 22 4.69 4.40 4.04 3.37 3.16 2.96 2.69 2.55 7 --1.29 --1.2 ----------------1
UNIT
V A
Reset Threshold
VTH-
G69_ _330_ G69_ _308_ G69_ _293_ G69_ _263_ G69_ _250_
V
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)
VHYS VTDC ICD IOL VCC = 1.5V, VCD = 0.5V VCC > VTH- + VHYS VCC = 2.5V, V RESET = 0.5V 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
% ppm/C V mA A mA mA ----mA ----mA A
RESET Output Current High (push-pull active low, G696L)
IOH
RESET Output Current Low (push-pull active high, G696H)
IOL
RESET Output Current High (push-pull active high, G696H)
IOH
RESET Open-Drain Output Leakage CurVCC > VTH, RESET deasserted rent (G697L) Note 1: Production testing done at TA = +25C; limits over temperature guaranteed by design.
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Typical Operating Characteristics
G696/G697
(VCC = full range, TA = -40C to +105C, unless otherwise noted. Typical values are at TA = +25C, 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
8 7 6
Supply Current (A) Supply Current (A)
Supply Curremt vs. Temperature (No Load)
7 6 5 4 3 2 1 0 -40 V CC=2.5V V CC=5V V CC=3.3V
5 4 3 2 1 0
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
-20
0
VCC (V)
20 40 Temperature (C)
60
80
Normalized Reset Threshold vs. Temperature
1.06 1.05
(V) I CD, CD Delay Pin Sink Current (mA)
CD Delay Pin Sink Current vs. Voltage
40 35
1.04 1.03 1.02 1.01 1 0.99 0.98 0.97 0.96
-40 -30 -20 -10 0 10
V TH+
Normalized Ormalized VTH+ , V
TH-
30 25 20
V CC=3V
V T H-
V CC=2.5V 15 10 5 0 V CC=1.5V
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)
10000
Output Time Delay vs. Capacitance (VCC 10000
1000
Output Time Delay(mS)
1000
Output Time Delay ( S)
100
100
10
10
1
1
0.1 0.0001 0.001 0.01 0.1 1 CD, Delay Pin Capacitance ( F)
0.1
0.0001 0.001 0.01 0.1 1 CD, Delay Pin Capacitance ( F)
Ver: 1.8 May 10, 2006
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Global Mixed-mode Technology Inc.
Typical Operating Characteristics (continued)
Reset Output Time Delay vs. Temperature
300
G696/G697
250
Output Time Delay (ms)
200
CD=0.1F
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
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Timing Diagram
G696/G697
V C C , P in 2
V CC V TH + V TH -
V CC C D , P in 5 0 .6 7 5 V IN
V CC R e se t O u tp u t (A ctiv e L ow ), P in 1 V TH 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
VCC
1
RESET
ICD
+
1
ICD RESET (RESET)
+
VTH
*
VTH
3 GND 5 () is for G696H
CD
3
GND 5
CD
Figure 2
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Pin Description
PIN
1
G696/G697
NAME
RESET (G696L/G697L)
FUNCTION
RESET Output remains low while VCC is below the reset threshold, and for delay time set by CD
RESET (G696H)
2 3 4 5 VCC GND NC 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 (P's) reset input starts the P 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. 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 (F). Fig1 and Fig2 show a timing deagram and a Functional Block. 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; 100k is large enough not to load RESET and small enough to pull RESET to ground. A 100k pull-up resistor to VCC is also recommended for the G697L if RESET is required to remain valid for VCC < 0.8V.
VCC
VCC RPULL-UP
VCC
G697
RESET
P
RESET MOTOROLA INPUT 68HCXX
GND
GND
VCC
G696
RESET
Figure 4. Interfacing to Ps with Bidirectional Reset I/O
+5.0V +5.0
GND
R1 100k
+3.3V
VCC RPULL-UP
VCC
5V SYSTEM
Figure3. RESET Valid to VCC = Ground Circuit 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 P and other circuitry is inoperative with VCC below 0.8V. However, in applications where RESET
Ver: 1.8 May 10, 2006
G697
RESET
RESET INPUT
GND
GND
Figure 5. G697L Open-Drain RESET Output Allows Use with Multiple Supplies
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Global Mixed-mode Technology Inc.
Interfacing to Ps with Bidirectional Reset Pins Since the RESET output on the G697L is open drain, this device interfaces easily with Ps that have bidirectional reset pins, such as the Motorola 68HC11. Connecting the P supervisor's RESET output directly to the microcontroller's (C'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
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 P 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. 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.
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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Global Mixed-mode Technology Inc.
Package Information
G696/G697
C L
D
E
H
1 e1 e
A A2 A1
b
SOT-23-5 (T1) Package
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
1. 2. 3. 4.
SYMBOL
A A1 A2 b C D E e e1 H L 1
MIN.
1.00 0.00 0.70 0.35 0.10 2.70 1.40 --------2.60 0.37 1
DIMENSION IN MM NOM.
1.10 ----0.80 0.40 0.15 2.90 1.60 1.90(TYP) 0.95 2.80 -----5
MAX.
1.30 0.10 0.90 0.50 0.25 3.10 1.80 --------3.00 ----9
MIN.
0.039 0.000 0.028 0.014 0.004 0.106 0.055 --------0.102 0.015 1
DIMENSION IN INCH NOM.
0.043 ----0.031 0.016 0.006 0.114 0.063 0.075(TYP) 0.037 0.110 ----5
MAX.
0.051 0.004 0.035 0.020 0.010 0.122 0.071 --------0.118 ----9
5.
Ver: 1.8 May 10, 2006
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Global Mixed-mode Technology Inc.
G696/G697
C L
D
E
H
1 e1 e
A2
A
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
SYMBOL
A A1 A2 b C D E e e1 H L 1
MIN.
----0.00 ----0.35 0.10 2.70 1.40 --------2.60 0.37 1
DIMENSION IN MM NOM.
------------0.40 0.15 2.90 1.60 1.90(TYP) 0.95 2.80 -----5
MAX.
1.00 0.10 0.90 0.50 0.25 3.10 1.80 --------3.00 ----9
MIN.
----0.000 ----0.014 0.004 0.106 0.055 --------0.102 0.015 1
DIMENSION IN INCH NOM.
------------0.016 0.006 0.114 0.063 0.075(TYP) 0.037 0.110 ----5
MAX.
0.039 0.004 0.035 0.020 0.010 0.122 0.071 --------0.118 ----9
Taping Specification
PACKAGE
SOT-23-5 TSOT-23-5
Feed Direction
Q'TY/REEL
3,000 ea 3,000 ea
TSOT-23-5SOT-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.
Ver: 1.8 May 10, 2006
TEL: 886-3-5788833 http://www.gmt.com.tw
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