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Teilenummer | G691L |
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Beschreibung | Microprocessor Reset IC | |
Hersteller | ETC | |
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Gesamt 12 Seiten Global Mixed-mode Technology Inc.
G690/G691
Microprocessor Reset IC
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 (G690L)
Push-Pull RESET Output (G690H)
Open-Drain RESET Output (G691L)
140ms min Power-On Reset Pulse Width
10µA Supply Current
Guaranteed Reset Valid to VCC = +1V
Power Supply Transient Immunity
No External Components
3-Pin SOT89, SOT23 and SC70 Packages
Applications
Computers
Controllers
Intelligent Instruments
Critical µP and µC Power Monitoring
Portable / Battery-Powered Equipment
Automotive
General Description
The G690/G691 are microprocessor (µP) supervisory
circuits used to monitor the power supplies in µP and
digital systems. They provide excellent circuit reliability
and low cost by eliminating external components and
adjustments when used with +5V, +3.3V, +3.0V- pow-
ered circuits.
These circuits perform a single function: they assert a
reset signal whenever the VCC supply voltage declines
below a preset threshold, keeping it asserted for at
least 140ms after VCC has risen above the reset
threshold. Reset thresholds suitable for operation with
a variety of supply voltages are available.
The G691L has an open-drain output stage, while the
G690 have push-pull outputs. The G691L’s open-drain
RESET output requires a pull-up resistor that can be
connected to a voltage higher than VCC. The G690L
have an active-low RESET output, while the G690H
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 1V.
Low supply current makes the G690/G691 ideal for
use in portable equipment. The G690/G691 are avail-
able in 3-pin SOT89 or SOT23 or SC70 packages.
Pin Configuration
3
1 23
SOT 89
12
SOT23/SC70
Typical Application
VCC
VCC
G690/G691
RESET
(RESET)
GND
VCC
*RPULL-UP
µP
RESET
INPUT
GND
*G691 ONLY
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
1
Global Mixed-mode Technology Inc.
G690/G691
Selector Guide
PART/SUFFIX RESET THRESHOLD (V)
G691L463Tx6
4.63
G691L438Tx6
4.38
G691L400Tx6
4.00
G691L308Tx6
3.08
G691L293Tx6
2.93
G691L263Tx6
2.63
G690H463Tx6
4.63
G690H438Tx6
4.38
G690H400Tx6
4.00
G690H308Tx6
3.08
G690H293Tx6
2.93
G690H263Tx6
2.63
G690L463Tx6
4.63
G690L438Tx6
4.38
G690L400Tx6
4.00
G690L308Tx6
3.08
G690L293Tx6
2.93
G690L263Tx6
2.63
Note: T2: SOT89; T7: SOT23; T9: SC70
OUTPUT TYPE
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Open-Drain
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull RESET
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
Push-Pull
SOT 89
685Fx
685Ex
685Dx
685Cx
685Bx
685Ax
684Lx
684Kx
684Jx
684Ix
684Hx
684Gx
684Fx
684Ex
684Dx
684Cx
684Bx
684Ax
TOP MARK
SOT 23
685Fx
685Ex
685Dx
685Cx
685Bx
685Ax
684Lx
684Kx
684Jx
684Ix
684Hx
684Gx
684Fx
684Ex
684Dx
684Cx
684Bx
684Ax
SC70
685Fx
685Ex
685Dx
685Cx
685Bx
685Ax
684Lx
684Kx
684Jx
684Ix
684Hx
684Gx
684Fx
684Ex
684Dx
684Cx
684Bx
684Ax
Ver: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
6
6 Page Global Mixed-mode Technology Inc.
G690/G691
D
b
L
E1 E
e
e1
C
A2 A
A1
SC70 (T9) Package
Note:
1. All dimensions are in millimeters
2. Dimensions are inclusive of plating of plating
3. Dimensions are exclusive of mold flash & metal burr
4. All specifications comply to EIAJ SC70
5. Coplanarity 4 Mils. Max.
SYMBOL
A
A1
A2
b
C
D
E
E1
e
e1
L
DIMENSION IN MILIMETERS
MIN.
MAX.
0.90
1.20
0.05
0.15
0.85
1.05
0.20
0.40
0.10
0.15
1.90
2.10
1.15
1.35
2.00
2.20
0.65 BSC.
1.30 BSC.
0.425 REF.
DIMENSION IN INCHS
MIN.
MAX.
0.035
0.047
0.002
0.006
0.033
0.041
0.008
0.016
0.004
0.006
0.075
0.083
0.045
0.053
0.0787
0.0866
0.0256 BSC.
0.0512 BSC.
0.0167 REF.
Package Orientation
Feed Direction
SOT 89 Package Orientation
Feed Direction
SOT23, SC70 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: 1.3
Oct 31, 2002
TEL: 886-3-5788833
http://www.gmt.com.tw
12
12 Page | ||
Seiten | Gesamt 12 Seiten | |
PDF Download | [ G691L Schematic.PDF ] |
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