G696H463T [GMT]
Microprocessor Reset IC; 微处理器复位IC
| 型号： | G696H463T |
| 厂家： | 
GLOBAL MIXED-MODE TECHNOLOGY INC |
| 描述： | Microprocessor Reset IC |
| 文件： | 总8页 (文件大小：213K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Global Mixed-mode Technology Inc.
G696/G697
Microprocessor Reset IC
Features
General Description
ꢀPrecision Monitoring of +3V, +3.3V, and +5V
Power-Supply Voltages
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.
ꢀFully Specified Over Temperature
ꢀAvailable in Three Output Configurations
Push-Pull RESET Output (G696L)
Push-Pull RESET Output (G696H)
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 pro-
gramable time delay generator. after VCC has risen
above the reset threshold. Reset thresholds suitable
for operation with a variety of supply voltages are
available.
Open-Drain RESET Output (G697L)
ꢀExternally Programmable Time Delay Generator
ꢀ6µA Supply Current
ꢀGuaranteed Reset Valid to VCC = 0.8V
ꢀPower Supply Transient Immunity
ꢀ5 pin SOT23-5 Packages
Applications
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 com-
parator 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.
ꢀ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 avail-
able in 5-pin SOT23-5 packages.
Ordering Information
PART
G696H(L)xxxT1 -40°C ~ +105°C
G697LxxxT1 -40°C ~ +105°C
* xxx specifies the threshold voltage.
TEMP. RANGE
PIN-PACKAGE
SOT23-5
SOT23-5
e.g. 263 denotes the 2.63V threshold voltage.
Pin Configuration
Typical Operating Circuit
VCC
CD
1
5
4
RESET(RESET)
VCC
VCC
Rpull-up*
VCC
G696/G697
SOT23-5
2
3
G696/G697
µP
RESET
RESET
CD
INPUT
(RESET)
N.C.
GND
GND
GND
CD
()is for G696H
*G697 ONLY
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
Jul 26, 2002
1
Global Mixed-mode Technology Inc.
G696/G697
Absolute Maximum Ratings
Terminal Voltage (with respect to GND)
Continuous Power Dissipation (TA = +70°C)
VCC.……………………………..…….…….-0.3V to +6.0V
Delay Capacitor Pin Voltage, VCD…..-0.3 to (VCC +0.3V)
5-Pin SOT23-5 (derate 2.17mW/°C above +70°C).174mW
Operating Temperature Range …...…..-40°C to +105°C
Storage Temperature Range..….…......-65°C to +150°C
Lead Temperature (soldering, 10s)...…...….…...+300°C
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
Stresses beyond those listed under “Absolute Maximum Ratings” may cause p’ermanent 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 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 versions, VCC= 3.3V for 308/293 versions, and VCC = 3V for 263 version.) (Note 1)
PARAMETER
VCC Range
SYMBOL
CONDITION
TA = 0°C +70°C
TA = -40°C +105°C
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_
MIN
0.8
1
TYP MAX UNITS
5.5
V
5.5
6
5
10
8.5
Supply Current (SOT23-5)
ICC
µA
V
4.537 4.63 4.722
4.293 4.38 4.467
3.92
3.234 3.30 3.366
3.019 3.08 3.141
2.872 2.93 2.988
2.578 2.63 2.682
4
4.08
Reset Threshold
VTH-
G69_ _293_
G69_ _263_
G69__463_
G69__438_
G69__400_
G69__330_
G69__308_
G69__293_
G69__263_
139
132
120
99
93
88
231
219
200
165
154
146
324
306
280
231
215
205
184
Reset Threshold Hystersis
VHYS
mV
79
131
70
Reset Threshold Tempco
ppm/°C
V
VCC = 5V G69_ _ 463/438/400/330__
VCC =3.3V G69_ _308/293
VCC =3.0V G69_ 263_
3
1.9
1.8
3
3.3
2.3
2.2
5
3.9
2.7
2.6
CD Delay Pin Threshold Voltage
VTDC
Delay Capacitor Pin Sink Current
Delay Pull up Resistance
ICD
RD
VCC = 1.5V, VCD = 0.5V
mA
MΩ
1
1.5
2.3
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
Jul 26, 2002
2
Global Mixed-mode Technology Inc.
G696/G697
(Continued)
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 version.) (Note 1)
PARAMETER
SYMBOL
CONDITION
MIN TYP MAX UNITS
RESET Output Current Low (push-pull active low,
and open-drain active-low, G696L and G697L)
IOL
V
CC = 2.5V, V RESET = 0.5V
8
4.5
3
mA
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
RESET Output Current High (push-pull active
low, G696L)
IOH
mA
2
16
12
10
2
VCC = 5V, VRESET = 0.5V,
G696H463/438/400/330
VCC = 3.3V, VRESET = 0.5V,
G696H308/293
RESET Output Current Low (push-pull active
high, G696H)
IOL
mA
V
CC = 3V, VRESET = 0.5V,
G696H263
RESET Output Current High (push-pull active
high, G696H)
RESET Open-Drain Output Leakage Current
(G697L)
IOH
VCC = 2.5V, VRESET = 2V
mA
µA
1
VCC > VTH, RESET deasserted
Note 1: Production testing done at TA = +25°C; limits over temperature guaranteed by design.
Selector Guide
PART/SUFFIX
RESET THRESHOLD (V)
OUTPUT TYPE
TOP MARK
G697L463T_
G697L438T_
G697L400T_
G697L330T_
G697L308T_
G697L293T_
G697L263T_
G696H463T_
G696H438T_
G696H400T_
G696H330T_
G696H308T_
G696H293T_
G696H263T_
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
697Gx
697Fx
697Ex
697Dx
697Cx
697Bx
697Ax
696Lx
696Kx
696Jx
696Nx
696Ix
696Hx
696Gx
Open-DrainRESET
Open-DrainRESET
Open-DrainRESET
Open-DrainRESET
Open-DrainRESET
Open-DrainRESET
Open-Drain RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
G696L463T_
G696L438T_
G696L400T_
G696L330T_
G696L308T_
G696L293T_
G696L263T_
4.63
4.38
4.00
3.30
3.08
2.93
2.63
696Fx
696Ex
696Dx
696Mx
696Cx
696Bx
696Ax
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
Jul 26, 2002
3
Global Mixed-mode Technology Inc.
G696/G697
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 version.)
Supply Current vs. VCC
Supply Curremt vs. Temperature (No Load)
8
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
VCC=5V
V
CC=3.3V
VCC=2.5
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
-40
-20
0
20
40
60
80
VCC (V)
Temperature (°C)
Output Time Delay vs. Capacitance
Normalized Reset Threshold vs. Temperature
10000
1000
100
10
1.06
1.05
1.04
1.03
1.02
1.01
1
Delay between VCC>VTH to output change (ms)
VT
VTH
Delay between VCC<VTH to
output change (us)
0.99
0.98
0.97
0.96
1
0.1
-40 -30 -20 -10
0
10 20 27 30 40 50 60 70 80 90
0.0001
0.001
0.01
0.1
1
CD, Delay Pin Capacitance (uF)
TA, Ambient Temperature (°C)
Delay Resistance vs. Temperature
CD Delay Pin Sink Current vs. Voltage
40
35
30
25
20
15
10
5
1.75
VCC=3V
1.7
1.65
1.6
V
CC=2.5
1.55
1.5
1.45
1.4
V
CC=1.5V
1.35
1.3
0
0.05
0.2
0.4
0.6
1.2
1.8
2.4
3
-40 -30 -20 -10
0
10
20
30
40
50
60
70
80
90
VCD, Delay Pin Voltage (V)
TA, Ambient Temperature (°C)
Reset Output Time Delay vs. Temperature
300
250
200
150
100
50
CD=0.1u F
0
-40 -30 -20 -10
0
10
20 30 40 50 60 70 80 90
TA, Ambient Temperature (°C)
TEL: 886-3-5788833
Ver: 1.1
http://www.gmt.com.tw
Jul 26, 2002
4
Global Mixed-mode Technology Inc.
Timing Diagram
G696/G697
VCC
+
VTH
VCC, Pin 2
-
VTH
VCC
CD, Pin 5
0.675 VIN
VCC
Reset Output
VTH
-
(Active Low), Pin 1
0V
VCC
Reset Output
VTH
-
(Active High), Pin 1
0V
tD2
Figure 1
Functional Diagram
1
VCC
2
VCC
RESET
2
RD
RD
1
RESET
+
+
(RESET)
*
VTH
VTH
3
GND
3 GND
5
5
CD
CD
() is for G696H
Figure 2
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
Jul 26, 2002
5
Global Mixed-mode Technology Inc.
Pin Description
G696/G697
PIN
NAME
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 (G696L/G697L)
1
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.
RESET (G696H)
2
3
4
5
VCC
GND
N.C.
CD
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.
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.
Connect a pull-up resistor on the G697L’s RESET out-
put to any supply between 0 and 5.5V.
VCC
The time delay is set by external capacitor CD, and
internal pull up resistor RD. When the voltage at CD
VCC
VCC
RPULL-UP
pin exceeds the buffer threshold, typically 0.675 VCC
,
µP
G697
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.
RESET MOTOROLA
RESET
INPUT
68HCXX
GND
GND
Figure 4. Interfacing to µPs with Bidirectional Reset
I/O
VCC
G696
+5.0V
RESET
+3.3V
R1
100k
GND
VCC
VCC
RPULL-UP
5V SYSTEM
Figure3. RESET Valid to VCC = Ground Circuit
Ensuring a Valid Reset Output Down to VCC = 0
G697
RESET
RESET
INPUT
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 con-
GND
GND
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
Figure 5. G697L Open-Drain RESET Output Allows
Use with Multiple Supplies
below 0.8V. However, in applications where RESET
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
Jul 26, 2002
6
Global Mixed-mode Technology Inc.
G696/G697
Interfacing to µPs with Bidirectional Reset Pins
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.
Since the RESET output on the G697L is open drain,
this device interfaces easily with µPs that have bidi-
rectional reset pins, such as the Motorola 68HC11.
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.
Connecting the µP supervisor’s RESET output di-
rectly to 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
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.
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
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.
RESET . Also, with any pull-up, RESET will be pulled
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
Jul 26, 2002
7
Global Mixed-mode Technology Inc.
Package Information
G696/G697
C
D
L
H
E
θ1
e1
e
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
DIMENSIONS IN MILLIMETERS
SYMBOLS
MIN
1.00
0.00
0.70
0.35
0.10
2.70
1.40
-----
-----
2.60
0.37
1º
NOM
1.10
MAX
1.30
0.10
0.90
0.50
0.25
3.10
1.80
-----
-----
3.00
-----
9º
A
A1
A2
b
C
D
E
e
e1
H
-----
0.80
0.40
0.15
2.90
1.60
1.90(TYP)
0.95
2.80
------
5º
L
θ1
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.
TEL: 886-3-5788833
http://www.gmt.com.tw
Ver: 1.1
Jul 26, 2002
8
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