Document
TS809/810/809R/810R Series
Microprocessor Reset Circuit
SOT-23
Pin Definition: TS809/TS810 1. Ground 2. RESET(RESET) 3. Vcc
TS809R/TS810R 1. RESET(RESET) 2. Ground 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
● Highly Accurate: ±2% ● Precision monitoring of +3V, +3.3V and +5V power
supply voltage ● 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 ● Guaranteed reset valid to Vcc = +1V ● Power supply transient immunity ● No external components
Applications
● Battery-operated systems ● Controllers ● Intelligent instruments ● Critical uP and uC power monitoring ● Portable / Battery powered equipment ● Automotive
Pin Descriptions
Ordering Information
Part No.
Package
Packing
TS809CXx RF
SOT-23
3Kpcs / 7” Reel
TS810CXx RF
SOT-23
3Kpcs / 7” Reel
TS809RCXx RF
SOT-23
3Kpcs / 7” Reel
TS810RCXx RF
SOT-23
3Kpcs / 7” Reel
Note: x is the threshold voltage type, option as A : 4.63V B : 4.38V C : 4.00V D : 3.08V E : 2.93V F : 2.63V G : 2.32V H : 2.1V I : 2.0V
Application Circuit
Name Gnd
RESET (RESET)
Vcc
Description 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
Terminal Voltage (with respect to Gnd) RESET & (RESET) push-pull Input Current, VCC Output Current, RESET, (RESET) Rate of Rise, VCC Continuous Power Dissipation Operating Junction Temperature Range Storage Temperature Range Lead Soldering Temperature (260oC)
VCC VRESET
ICC IO VR PD TOPR TSTG TLEAD
Electrical Specifications (Ta = 25oC, unless otherwise noted)
Parameter Input Supply Voltage
Supply Current
Conditions Ta=-40oC~+85oC
VIN=VIN *1.10 VIN=VIN *1.10, Ta=-40oC~+85oC
TS809/809R/810/810RCXA
Symbol VCC
ICC
TS809/809R/810/810RCXB
TS809/809R/810/810RCXC
TS809/809R/810/810RCXD
Reset Threshold
TS809/809R/810/810RCXE TS809/809R/810/810RCXF
VTH
TS809/809R/810/810RCXG
TS809CXH
TS809CXI
Reset Threshold
Temperature Coefficient
VCC to Reset Delay
VCC = VTH - 100mV
Reset Active Timeout Period Ta=-40oC~+85oC
TDELAY
RESET Output (TS809/R) Voltage Low
VCC < VTH(MAX), ISINK =1.2mA
VOL
RESET Output (TS809/R) Voltage High
(RESET) Output (TS810/R) Voltage Low
VCC > VTH(MAX), ISOURCE =0.5mA, VCC > 1.8V VCC > VTH(MAX), ISOURCE =0.15mA, 1.8V ≥ VCC >1.0V
VCC > VTH(MAX), ISINK =1.2mA
VOH VOL
(RESET) Output (TS810/R) Voltage High
VCC < VTH(MAX), ISOURCE =0.5mA, VCC > 1.8V
VCC > VTH(MAX), ISOURCE =0.15mA, 1.8V ≥ VCC >1.0V
VOH
Maximum 7
- 0.3 ~ (VCC +0.3) 20 20 100 320
-40 ~ +125 -65 ~ +150
10
Unit V V mA mA
V/uS mW oC oC
S
Min Typ Max Unit
1.0 -- 5.5 V
--
---
3.0 5.0
uA
4.56 4.63
4.7
4.31 4.38 4.45
3.94 4.00 4.06
3.03 3.08 3.13
2.89 2.93 2.97
V
2.59 2.63 2.67
2.28 2.32 2.35
2.07 2.1 2.13
1.97 2.0 2.03
30
50
160
ppm/ oC
-- 40 -- uS
140 210 500 mS
-- -- 0.2 V
0.8 VCC
--
--
V
-- -- 0.2 V
0.8 VCC
--
--
V
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, startin.