TSC TS809, TS810, TS809R, TS810R Technical data
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TS809/ 810/ 809R/ 810R
Pin assignment:
TS809/810
1. Gnd
2. RESET (RESET)
3. Vcc
Pin assignment:
TS809R/810R
1. RESET (RESET)
Gnd
2.
Vcc
3.
Microprocessor Reset Circuit
Threshold Voltage Option
From 2.63V ~ 4.63V
General Description
The TS809/810/809R/810R 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
240ms(typ) after VCC has risen above the reset threshold. Reset thresholds suitable for operation with a variety of
supply voltages are available. The TS809/810/809R/810R 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 TS809/810/809R/810R ideal for use in portable equipment.
The TS809/810/809R/810R is available in a 3-pin SOT-23 package.
Features
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
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
(TS809 & TS809R)
No external components
Applications
Computers
Controllers
Intelligent instruments
Critical uP and uC power monitoring
Portable / Battery powered equipment
Automotive
Ordering Information
Part No. Enable Function Package
TS809CX x Active-Low
TS810CX x Active-High
TS809RCXx Active-Low
TS810RCXx Active-High
Note: x is the threshold voltage type, option as
: 4.63V
A
: 4.38V
B
: 4.00V
C
: 3.08V
D
: 2.93V
E
: 2.63V
F
Pin Descriptions
Name Description
Gnd Ground
RESET
(RESET)
Vcc Operating voltage input
Reset output pin
L: for TS809 & TS811
H: for TS809R & TS811R
SOT-23
TS809/810/809R/810R 1-6 2004/09 rev. D
Absolute Maximum Rating
Terminal Voltage (with respect to Gnd) VCC - 0.3 ~ +6.0 V
RESET & (RESET) push-pull V
- 0.3 ~ (VCC +0.3) V
RESET
Input Current, Vcc ICC 20 mA
Output Current, RESET, (RESET) IO 20 mA
Continuous Power Dissipation (Ta=+70 oC)
PD 320 mW
de-rate 4mW/ oC above +70 oC
Operating Junction Temperature Range TOP -40 ~ +105
Storage Temperature Range T
Lead Soldering Temperature (260 oC) T
Electrical Characteristics (Ta = 25
o
C, unless otherwise specified.)
-65 ~ +150
STG
10 S
LEAD
o
C
o
C
Parameter Conditions Symbol Min Typ Max Unit
Input Supply Voltage Ta = 0 oC ~ +70 oC VCC 1.0 -- 5.5 V
V
≤ 5.5V -- 19 60 Supply Current
CC
≤ 3.6V
V
CC
Reset Threshold
TS809/910/809R/810RCXA 4.56 4.63 4.7
TS809/910/809R/810RCXB 4.31 4.38 4.45
TS809/910/809R/810RCXC 3.94 4.00 4.06
TS809/910/809R/810RCXD 3.03 3.08 3.13
TS809/910/809R/810RCXE 2.89 2.93 2.97
TS809/910/809R/810RCXF
Reset Threshold
V
Temperature Coefficient
Vcc Rising Time to Function Ta = -20 oC ~ +105 oC 25 -- -- uS/V
VCC to Reset Delay VCC = VTH to (VTH - 100mV) 20 100 uS
Reset Active Timeout Period Ta = 0 oC ~ +70 oC
RESET
Output Voltage Low
VCC = V
TH(MIN), ISINK
TS809 & TS809R
VCC = V
V
VCC > V
> 1.0V, I
CC
TH(MIN), ISINK
TH(MAX), ISOURCE
=1.2mA,
=3.2mA, -- -- 0.4
=50uA
SINK
=500uA,
TS809 & TS809R
> V
V
CC
VCC = V
TH(MAX), ISOURCE
TH(MAX), ISINK
=800uA,
=1.2mA,
TS810 & TS810R
= V
V
CC
RESET Output Voltage High 1.8V < V
I
SOURCE
TH(MAX), ISINK
< V
CC
=150uA,
=3.2mA,
TH(MIN),
TS810 & TS810R
I
CC
- 17 50
VTH
2.59 2.63 2.67
-- 30 -- ppm/
TH
T
DELAY
100 240 600 mS
V
OL
-- -- 0.3
-- -- 0.3
V
OH
V
OL
0.8 V
CC
-- -- RESET Output Voltage High
1.5 -- --
V
CC –
-- -- 0.3 RESET Output Voltage Low
-- -- 0.4
VOH 0.8 V
CC
-- -- V
uA
V
o
C
V
V
V
TS809/810/809R/810R 2-6 2004/09 rev. D
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