View G697L463T_1243972.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

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 programable 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. Low supply current makes the G696/G697 ideal for use in portable equipment. The G696/G697 are available in 5-pin SOT23-5 packages.
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 6A Supply Current Guaranteed Reset Valid to VCC = 0.8V Power Supply Transient Immunity 5 pin SOT23-5 Packages
Applications
Computers Controllers Intelligent Instruments Critical P and C Power Monitoring Portable / Battery-Powered Equipment Automotive
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
SOT23-5 SOT23-5 G696H(L)xxxT1 -40C ~ +105C G697LxxxT1 -40C ~ +105C
* xxx specifies the threshold voltage. e.g. 263 denotes the 2.63V threshold voltage.
Pin Configuration
Typical Operating Circuit
V CC
RESET(RESET) 1
5
CD V CC Rpull-up*
V CC
V CC
2
G696/G697
G696/G697
CD RESET (RESET) GND CD
P
RESET INPUT GND
GND 3
4 SOT23-5
N.C.
()is for G696H
*G697 ONLY
Ver: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
1
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 Output Current, RESET, RESET ........................20mA
G696/G697
Continuous Power Dissipation (TA = +70C) 5-Pin SOT23-5 (derate 2.17mW/C above +70C).174mW Operating Temperature Range ...........-40C to +105C Storage Temperature Range...............-65C to +150C Lead Temperature (soldering, 10s)...................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause p'ermanent 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 versions, VCC= 3.3V for 308/293 versions, and VCC = 3V for 263 version.) (Note 1) PARAMETER
VCC Range Supply Current (SOT23-5) ICC
SYMBOL
CONDITION
TA = 0C +70C TA = -40C +105C VCC<5.5V, G69_ _463/438/400/330_ VCC<3.6V, G69_ _308/293/263_ G69_ _463_ G69_ _438_ G69_ _400_ G69_ _330_ G69_ _308_ G69_ _293_ G69_ _263_ G69__463_ G69__438_ G69__400_ G69__330_ G69__308_ G69__293_ G69__263_ VCC = 5V G69_ _ 463/438/400/330__ VCC =3.3V G69_ _308/293 VCC =3.0V G69_ 263_ VCC = 1.5V, VCD = 0.5V
MIN
0.8 1
TYP MAX UNITS
5.5 5.5 10 8.5 4.722 4.467 4.08 3.366 3.141 2.988 2.682 324 306 280 231 215 205 184 3.9 2.7 2.6 2.3 V A
Reset Threshold
VTH-
Reset Threshold Hystersis
VHYS
4.537 4.293 3.92 3.234 3.019 2.872 2.578 139 132 120 99 93 88 79 3 1.9 1.8 3 1
Reset Threshold Tempco CD Delay Pin Threshold Voltage Delay Capacitor Pin Sink Current Delay Pull up Resistance VTDC ICD RD
6 5 4.63 4.38 4 3.30 3.08 2.93 2.63 231 219 200 165 154 146 131 70 3.3 2.3 2.2 5 1.5
V
mV
ppm/C V
mA M
Ver: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
2
Global Mixed-mode Technology Inc.
Electrical Characteristics (Continued)
G696/G697
MIN
8 4.5 3 2 16 12 10 2 1 mA A mA mA
(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 version.) (Note 1) PARAMETER
RESET Output Current Low (push-pull active low, and open-drain active-low, G696L and G697L)
SYMBOL
IOL
CONDITION
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 VCC = 5V, VRESET = 0.5V, G696H463/438/400/330 VCC = 3.3V, VRESET = 0.5V, G696H308/293 VCC = 3V, VRESET = 0.5V, G696H263 VCC = 2.5V, VRESET = 2V VCC > VTH, RESET deasserted
TYP MAX UNITS
mA
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)
RESET Open-Drain Output Leakage Current (G697L)
IOH
Note 1: Production testing done at TA = +25C; limits over temperature guaranteed by design.
Selector Guide
PART/SUFFIX
G697L463T_ G697L438T_ G697L400T_ G697L330T_ G697L308T_ G697L293T_ G697L263T_ G696H463T_ G696H438T_ G696H400T_ G696H330T_ G696H308T_ G696H293T_ G696H263T_ G696L463T_ G696L438T_ G696L400T_ G696L330T_ G696L308T_ G696L293T_ G696L263T_
RESET THRESHOLD (V)
4.63 4.38 4.00 3.30 3.08 2.93 2.63 4.63 4.38 4.00 3.30 3.08 2.93 2.63 4.63 4.38 4.00 3.30 3.08 2.93 2.63
OUTPUT TYPE
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
TOP MARK
697Gx 697Fx 697Ex 697Dx 697Cx 697Bx 697Ax 696Lx 696Kx 696Jx 696Nx 696Ix 696Hx 696Gx 696Fx 696Ex 696Dx 696Mx 696Cx 696Bx 696Ax
Ver: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
3
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 version.)
Supply Current vs. VCC
8 7 6
Supply Curremt vs. Temperature (No Load)
7 6 Supply Current (uA) 5 4 3 2 1 0 VCC=5V VCC=3.3V
Supply Current (u A)
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
VCC=2.5
-40
-20
0
20
40
60
80
VCC (V)
Temperature (C)
Normalized Reset Threshold vs. Temperature
1.06 Normalized Ormalized V TH+, VTH- (V) 1.05 1.04 1.03 1.02 1.01 1 0.99 0.98 0.97 0.96
-40 -30 -20 -10 0 10 20 27 30 40 50 60 70 80 90 0.1
0.0001
Output Time Delay vs. Capacitance
10000
VT
Output Time Delay
1000
Delay between VCC>VTH to output change (ms)
100
V TH
10
Delay between VCC1
0.001
0.01
0.1
1
T A, Ambient Temperature (C)
CD, Delay Pin Capacitance (uF)
C D Delay Pin Sink Current vs. Voltage
40
ICD, CD DELAY PIN SINK CURRENT (mA)
Delay Resistance vs. Temperature
1.75
35 30 25 20 15 10 5 0
0.05 0.2 0.4 0.6
VCC=3V RD, Delay Resistance (M )
2.4 3
1.7 1.65 1.6 1.55 1.5 1.45 1.4 1.35 1.3
VCC=2.5
VCC=1.5V
1.2
1.8
-40
-30
-20
-10
0
10
20
30
40
50
60
70
80
90
V CD, Delay Pin Voltage (V)
T A, Ambient Temperature (C)
Reset Output Time Delay vs. Temperature
300 250 Output Time Delay (ms) 200 150 100 50 0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
CD=0.1u F
T A, Ambient Temperature (C)
Ver: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
4
Global Mixed-mode Technology Inc.
Timing Diagram
G696/G697
V CC , Pin 2
V CC V TH + V TH -
V CC C D , Pin 5 0.675 V IN
V CC Reset Output (Active Low), Pin 1 V TH 0V
V CC Reset Output (Active High), Pin 1 V TH 0V t D2
Figure 1
Functional Diagram
2 VCC
2 VCC
1 RESET
RD
+
1
RD RESET (RESET)
+
VTH
*
VTH
3 GND 5 CD () is for G696H
3 GND 5 CD
Figure 2
Ver: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
5
Global Mixed-mode Technology Inc.
Pin Description
PIN
1 2 3 4 5
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)
VCC GND N.C. 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 resistor RD. When the voltage at CD pin exceeds the buffer threshold, typically 0.675 VCC, 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
Figure 4. Interfacing to Ps with Bidirectional Reset I/O
G696
RESET
+5.0V +5.0 +3.3V
GND
R1 100k
VCC RPULL-UP
VCC
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
G697
RESET
5V SYSTEM
RESET INPUT
GND
GND
Figure 5. G697L Open-Drain RESET Output Allows Use with Multiple Supplies
Ver: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
6
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: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
7
Global Mixed-mode Technology Inc.
Package Information
D
G696/G697
C L
E
H
e1 e
1
A A2 A1
b
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 SYMBOLS
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
DIMENSIONS IN MILLIMETERS 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
Taping Specification
Feed Direction SOT23-5 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: 1.1 Jul 26, 2002
TEL: 886-3-5788833 http://www.gmt.com.tw
8

▲Up To Search▲

Price & Availability of G697L463T

	To Download G697L463T Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .