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零件编号 | S-1000 | ||
描述 | Ultra Small Package High Precision Voltage Detector | ||
制造商 | Seiko Instruments | ||
LOGO | |||
1 Page
S-1000 Series
www.sii-ic.com
© Seiko Instruments Inc., 2004-2015
ULTRA-SMALL PACKAGE HIGH-PRECISION
VOLTAGE DETECTOR
Rev.3.1_00
The S-1000 series is a series of high-precision voltage detectors developed using CMOS process. The detection voltage is
fixed internally with an accuracy of ±1.0%. It operates with low current consumption of 350 nA typ. Two output forms, Nch
open-drain and CMOS output, are available. CMOS voltage detector, S-1000 Series is the most suitable for the portable
equipments with ultra low current consumption, high precision and corresponding to the small package.
Features
• Ultra-low current consumption
• High-precision detection voltage
• Operating voltage range
• Hysteresis characteristics
• Detection voltage
• Output form
• Lead-free, Sn 100%, halogen-free*1
350 nA typ. (VDD = detection voltage + 1.5 V)
±1.0%
0.95 to 5.5 V
5% typ.
1.5 to 4.6 V (0.1 V step)
Nch open-drain output (Active “L”)
CMOS output (Active “L”)
*1. Refer to “ Product Name Structure” for details.
Applications
• Power monitor for microcomputers and reset for CPUs.
• Power monitor for portable equipments such as cellular phones, digital still cameras and PDAs.
• Constant voltage power monitor for cameras, video equipments and communication devices.
Packages
• SC-82AB
• SOT-23-5
• SNT-4A
Seiko Instruments Inc.
1
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series
Rev.3.1_00
Absolute Maximum Ratings
Table 8
Item
Power supply voltage
Output voltage
Nch open-drain output products
CMOS output products
Output current
SC-82AB
Symbol
VDD − VSS
VOUT
IOUT
Power dissipation
SOT-23-5
PD
SNT-4A
Operating ambient temperature
Topr
Storage temperature
Tstg
*1. When mounted on board
[Mounted board]
(1) Board size: 114.3 mm × 76.2 mm × t1.6 mm
(2) Board name: JEDEC STANDARD51-7
(Ta = 25 °C unless otherwise specified)
Absolute maximum ratings
Unit
6V
VSS − 0.3 to VSS + 6
VSS − 0.3 to VDD + 0.3
50
V
V
mA
200 (When not mounted on board)
350*1
mW
mW
300 (When not mounted on board)
600*1
300*1
mW
mW
mW
−40 to +85
°C
−40 to +125
°C
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
700
600
500 SOT-23-5
400 SC-82AB
300 SNT-4A
200
100
0
0 50 100 150
Ambient Temperature (Ta) [°C]
Figure 7 Power Dissipation of Package (When Mounted on Board)
8 Seiko Instruments Inc.
ULTRA-SMALL PACKAGE HIGH-PRECISION VOLTAGE DETECTOR
S-1000 Series
Rev.3.1_00
VDD
(−VDET) Max.
(−VDET) Min.
Detection voltage
Detection voltage range
Release voltage
(+VDET) Max.
(+VDET) Min.
VDD
Release voltage range
OUT
OUT
Figure 18 Detection voltage (CMOS output products)
Figure 19 Release voltage (CMOS output products)
2. Hysteresis width (VHYS)
The hysteresis width is the voltage difference between the detection voltage and the release voltage (The voltage at point
B − The voltage at point A = VHYS in Figure 15). The existence of the hysteresis width prevents malfunction caused by
noise on input signal.
3. Through-type current
The through-type current refers to the current that flows instantaneously at the time of detection and release of a voltage
detector. The through-type current is large in CMOS output products, small in Nch open-drain output products.
4. Oscillation
In applications where a resistor is connected to the voltage detector input (Figure 20), taking a CMOS active “L” product
for example, the through-type current which is generated when the output goes from “L” to “H” (release) causes a voltage
drop equal to [through-type current] × [input resistance] across the resistor. When the input voltage drops below the
detection voltage (−VDET) as a result, the output voltage goes to low level. In this state, the through-type current stops
and its resultant voltage drop disappears, and the output goes from “L” to “H”. The through-type current is then
generated again, a voltage drop appears, and repeating the process finally induces oscillation.
VDD
RA
VIN
S-1000C
OUT
RB
VSS
Figure 20 An example for bad implementation of input voltage divider
16 Seiko Instruments Inc.
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页数 | 30 页 | ||
下载 | [ S-1000.PDF 数据手册 ] |
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