GN809 Datasheet, PDF (1/4 Pages) GTM CORPORATION – UPROCESSOR SUPERVISORY

ISSUED DATE :2006/08/18
REVISED DATE :
GN809
Processor Supervisory
Description
The GN809 family allows the user to customize the CPU reset function without any external components. The
user has a large choice of reset voltage thresholds and output driver configurations, all of which are preset at
the factory. Each wafer is trimmed to the customer’s specifications.
These circuits monitor the power supply voltage of up based systems. When the power supply voltage drops
below the voltage threshold a reset is asserted immediately (within an interval T_D1). The reset remains asserted
after the supply voltage rises above the voltage threshold for a time interval, T_D2. The reset output is active low
(RESETB). The reset output may be configured as either push/pull or open drain. The state of the reset output
is guaranteed to be correct for supply voltage greater than 1V.
Space saving SOT-23 package and micropower quiescent current (<3.0uA) make this family a natural for
portable battery powered equipment.
Features
ԦTight Voltage Threshold Tolerance ±1.5%
ԦWide Temperature Range -40к to 80к
Ô¦Low Quiescent Current <3.0uA
Ô¦Lead Free Products Meet RoHS standards
Applications
Ô¦Power Supplies
Ô¦Data Acquisition Systems
Ô¦Applications using CPUs
Ô¦Consumer Electronics
Ô¦Computer Peripherals
Ô¦Portable Electronics
Package Dimensions
Typical Operating Circuit
GN809
Note:* External pull-up resistor is required if
open-drain output is used. 10k is recommended.
SOT-23
TPU.34)QBDLBHF*
Block Diagram
GN809 with Push-Pull RESET
REF.
A
B
C
D
E
F
Millimeter
Min. Max.
2.70
3.10
2.40
2.80
1.40
1.60
0.35
0.50
0
0.10
0.45
0.55
REF.
G
H
K
J
L
M
Millimeter
Min.
Max.
1.90 REF.
1.00
1.30
0.10
0.20
0.40
-
0.85
1.15
0̓
10̓
GN809
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