TS810CXFRF [TSC]
Microprocessor Reset Circuit; 微处理器复位电路型号: | TS810CXFRF |
厂家: | TAIWAN SEMICONDUCTOR COMPANY, LTD |
描述: | Microprocessor Reset Circuit |
文件: | 总7页 (文件大小:328K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
TS809/810/809R/810R Series
Microprocessor Reset Circuit
Pin Definition:
TS809/TS810
1. Ground
SOT-23
TS809R/TS810R
1. RESET(RESET)
2. Ground
2. RESET(RESET)
3. Vcc
3. Vcc
General Description
The TS809/810 series are microprocessor (µP) supervisory circuit 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 powered 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 TS809/810 series have push pull outputs. The TS809/809R have an active low RESET
output, while the TS810/810R has an active high (RESET) output. The reset comparator is designed to ignore fast
transients on VCC, and the output guaranteed to be in the correct logic state for VCC down to 1V. Low supply correct
makes the TS809/810 series ideal for use in portable equipment.
Features
Ordering Information
●
●
Highly Accurate: ±2%
Part No.
TS809CXx RF
TS810CXx RF
TS809RCXx RF
TS810RCXx RF
Package
Packing
Precision monitoring of +3V, +3.3V and +5V power
supply voltage
SOT-23
SOT-23
SOT-23
SOT-23
3Kpcs / 7” Reel
3Kpcs / 7” Reel
3Kpcs / 7” Reel
3Kpcs / 7” Reel
●
●
●
●
●
●
●
●
●
Fully specified over temperature
Available in three output configurations
Push-Pull RESET low output (TS809/TS809R)
Push-Pull (RESET) high output (TS810/TS810R)
140mS min. power-on reset pulse width
12uA supply current
Note: x is the threshold voltage type, option as
A : 4.63V
E : 2.93V
I : 2.0V
B : 4.38V C : 4.00V D : 3.08V
F : 2.63V G : 2.32V H : 2.1V
Guaranteed reset valid to Vcc = +1V
Power supply transient immunity
No external components
Application Circuit
Applications
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●
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Battery-operated systems
Controllers
Intelligent instruments
Critical uP and uC power monitoring
Portable / Battery powered equipment
Automotive
Pin Descriptions
Name
Description
Gnd
RESET
(RESET)
Vcc
Ground
RESET – TS809 / TS809R (Active Low)
(RESET) – TS810 / TS810R (Active High)
Operating voltage input
1/7
Version: A07
TS809/810/809R/810R Series
Microprocessor Reset Circuit
Absolute Maximum Rating
Parameter
Symbol
VCC
Maximum
Unit
V
Terminal Voltage (with respect to Gnd)
RESET & (RESET) push-pull
Input Current, VCC
7
VRESET
ICC
- 0.3 ~ (VCC +0.3)
V
20
20
mA
mA
V/uS
mW
oC
Output Current, RESET, (RESET)
Rate of Rise, VCC
IO
VR
100
Continuous Power Dissipation
Operating Junction Temperature Range
Storage Temperature Range
Lead Soldering Temperature (260oC)
PD
320
TOPR
TSTG
TLEAD
-40 ~ +125
-65 ~ +150
10
oC
S
Electrical Specifications (Ta = 25oC, unless otherwise noted)
Parameter
Conditions
Ta=-40oC~+85oC
Symbol
Min
1.0
Typ
--
Max
5.5
Unit
Input Supply Voltage
VCC
V
VIN=VIN *1.10
--
--
3.0
Supply Current
ICC
uA
VIN=VIN *1.10, Ta=-40oC~+85oC
TS809/809R/810/810RCXA
TS809/809R/810/810RCXB
TS809/809R/810/810RCXC
TS809/809R/810/810RCXD
TS809/809R/810/810RCXE
TS809/809R/810/810RCXF
TS809/809R/810/810RCXG
TS809CXH
-
--
5.0
4.56
4.31
3.94
3.03
2.89
2.59
2.28
2.07
1.97
4.63
4.38
4.00
3.08
2.93
2.63
2.32
2.1
4.7
4.45
4.06
3.13
2.97
2.67
2.35
2.13
2.03
Reset Threshold
VTH
V
TS809CXI
2.0
Reset Threshold
ppm/
oC
30
50
160
Temperature Coefficient
VCC to Reset Delay
Reset Active Timeout Period Ta=-40oC~+85oC
VCC = VTH - 100mV
--
40
--
uS
TDELAY
VOL
140
210
500
mS
RESET Output (TS809/R)
VCC < VTH(MAX), ISINK =1.2mA
--
--
--
--
--
0.2
--
V
V
V
V
Voltage Low
VCC > VTH(MAX), ISOURCE =0.5mA,
VCC > 1.8V
RESET Output (TS809/R)
Voltage High
0.8
VOH
VOL
VOH
VCC
VCC > VTH(MAX), ISOURCE =0.15mA,
1.8V ≥ VCC >1.0V
(RESET) Output (TS810/R)
Voltage Low
VCC > VTH(MAX), ISINK =1.2mA
--
0.2
--
VCC < VTH(MAX), ISOURCE =0.5mA,
VCC > 1.8V
(RESET) Output (TS810/R)
Voltage High
0.8
VCC
VCC > VTH(MAX), ISOURCE =0.15mA,
1.8V ≥ VCC >1.0V
2/7
Version: A07
TS809/810/809R/810R Series
Microprocessor Reset Circuit
Application Note
Function Description
A microprocessor’s (µP’s) reset input starts the µP In a know state. The TS809/810/809R/810R 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, keeping it asserted for at least 140ms after Vcc
has risen above the reset threshold. The TS809/810/809R/810R have a push-pull output stage.
Applications Information
Negative-Going VCC transients in addition to issuing a reset to the µP during power-up, power-down, and brownout
conditions, the TS809/810 are relatively immune to short-duration negative-going Vcc transients (glitches).
The TS809/810/809R/810R do not generate a reset pulse. The graph was generated using a negative going pulse
applied to Vcc, starting 0.5V above the actual reset threshold and ending below it by the magnitude indicated (reset
comparator overdrive). The graph indicates the maximum pulse width a negative going Vcc transient can have
without causing a reset pulse. As the magnitude of the transient increases (goes farther below the reset threshold),
the maximum allowable pulse width decreases. Typically, a Vcc transient that goes 100mV below the reset threshold
and lasts 20µS or less will not cause a reset pulse. A 0.1µF bypass capacitor mounted as close as possible to the
Vcc pin provides additional transient immunity.
Ensuring a Valid Reset Output Down to Vcc=0
When Vcc falls below 1V, the TS809/810/809R/810R reset output no longer sinks current - it becomes an open
circuit. Therefore, high impedance CMOS logic input connected to reset can drift to undetermined voltages.
This present no problem in most applications since most µP and other circuitry is inoperative with Vcc below
1V.However, in applications where reset must be valid down to 0V, adding a pull down resistor to reset causes and
stray leakage currents to flow to ground, holding reset low (Figure 2.) R1’s value is not critical; 100K is large enough
not to load reset and small enough to pull RESET to ground. For the TS809/810/809R/810R if reset is required to
remain valid for Vcc<1V.
Benefits of Highly Accurate Reset Threshold
Most µP supervisor ICs has 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 many or may not be asserted
Timming Diagram
3/7
Version: A07
TS809/810/809R/810R Series
Microprocessor Reset Circuit
Electrical Characteristics Curve
Figure 1. Reset Time vs. Temperature
Figure 2. Threshold vs. Temperature
Figure 3. IIN vs. Temperature
Figure 4. Reset Time vs. Temperature
Figure 5. IIN vs. VIN
Figure 6. Reset Voltage vs. Temperature
4/7
Version: A07
TS809/810/809R/810R Series
Microprocessor Reset Circuit
Function Block
Marking Information
Identification
Identification
Code
Identification
Code
Identification
Code
Part No.
Part No.
Part No.
Part No.
Code
ARK
ARN
ASB
ASA
AMO
AMP
ATT
TS809CXA
TS809CXB
TS809CXC
TS809CXD
TS809CXE
TS809CXF
TS809CXG
TS809CXH
TS809CXI
TS810CXA
TS810CXB
TS810CXC
TS810CXD
TS810CXE
TS810CXF
TS810CXG
--
ARJ
ALS
AAC
ASU
ALV
AZM
AAG
--
TS809RCXA
TS809RCXB
TS809RCXC
TS809RCXD
TS809RCXE
TS809RCXF
TS809RCXG
--
ABA
ABB
ATQ
ATO
AUV
ABF
ABG
--
TS810RCXA
TS810RCXB
TS810RCXC
TS810RCXD
TS810RCXE
TS810RCXF
TS810RCXG
--
ACA
ACB
ACC
ACD
ACE
ACF
ACG
--
ASK
BDT
--
--
--
--
--
--
5/7
Version: A07
TS809/810/809R/810R Series
Microprocessor Reset Circuit
SOT-23 Mechanical Drawing
SOT-23 DIMENSION
MILLIMETERS
MIN MAX
0.95 BSC
1.9 BSC
2.40
INCHES
MIN MAX.
DIM
A
A1
B
C
D
E
F
0.037 BSC
0.074 BSC
3.00
1.80
3.10
1.40
0.15
0.50
0.25
0.094
0.118
0.070
0.122
0.055
0.059
0.020
0.009
1.40
2.70
1.00
0.00
0.35
0.09
0.055
0.106
0.039
0.000
0.014
0.003
G
H
I
0.35 BSC
0.0138 BSC
J
5º
10º
5º
10º
6/7
Version: A07
TS809/810/809R/810R Series
Microprocessor Reset Circuit
Notice
Specifications of the products displayed herein are subject to change without notice. TSC or anyone on its behalf,
assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, to any
intellectual property rights is granted by this document. Except as provided in TSC’s terms and conditions of sale for
such products, TSC assumes no liability whatsoever, and disclaims any express or implied warranty, relating to sale
and/or use of TSC products including liability or warranties relating to fitness for a particular purpose, merchantability,
or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications. Customers
using or selling these products for use in such applications do so at their own risk and agree to fully indemnify TSC for
any damages resulting from such improper use or sale.
7/7
Version: A07
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