CATALYST CAT809, CAT810 Service Manual
CAT809, CAT810
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3-Pin Microprocessor Power Supply Supervisors
FEATURES
■ Precision monitoring of
+5.0 V (+/- 5%, +/- 10%, +/- 20%),
+3.3 V (+/- 5%, +/ 10%),
+3.0 V (+/- 10%) and
+2.5 V (+/- 5%) power supplies
■ Offered in two output configurations:
- CAT809: Active LOW reset
- CAT810: Active HIGH reset
■ Direct replacements for the MAX809 and
■ Reset valid down to V
■ 6 µA power supply current
■ Power supply transient immunity
■ Compact 3-pin SOT23 and SC70 packages
■ Industrial temperature range: -40˚C to +85˚C
APPLICATIONS
■ Computers
■ Servers
■ Laptops
■ Cable modems
■ Wireless communications
■ Embedded control systems
■ White goods
■ Power meters
■ Intelligent instruments
■ PDAs and handheld equipment
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MAX810 in applications operating over the
industrial temperature range
= 1.0 V
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DESCRIPTION
The CAT809 and CAT810 are µP supervisory circuits
that monitor power supplies in digital systems. The
CAT809 and CAT810 are direct replacements for the
MAX809 and MAX810 in applications operating over the
industrial temperature range.
These devices generate a reset signal, which is asserted
while the power supply voltage is below a preset threshold
level and for at least 140 ms after the power supply level
has risen above that level. The underlying floating gate
technology, AE
makes it possible to offer any custom reset threshold
value. Seven industry standard threshold levels are
2(TM)
used by Catalyst Semiconductor,
THRESHOLD SUFFIX SELECTOR
Nominal Threshold Threshold Suffix
Voltage Designation
4.63V L
4.38V M
4.00V J
3.08V T
2.93V S
2.63V R
2.32V Z
offered to support +5.0 V, +3.3 V, +3.0 V and +2.5 V
systems.
The CAT809 features a RESET push-pull output (active
LOW) and the CAT810 features a RESET push-pull
output (active HIGH).
Fast transients on the power supply are ignored and the
output is guaranteed to be in the correct state at V
levels as low as 1.0 V.
The CAT809/810 are fully specified over the industrial
temperature range (-40˚C to 85˚C) and are available in
compact 3-pin SOT23 and SC70 packages.
PIN CONFIGURATION
1
GND
RESET
(RESET)
CAT809
(CAT810)
2
3-Lead SOT23
3-Lead SC70
3
V
CC
cc
© 2004 by Catalyst Semiconductor, Inc., Patent Pending
Characteristics subject to change without notice
1
Doc. No. 3004, Rev. S
CAT809, CAT810
ORDERING INFORMATION
rebmuNtraPgniredrOytiraloPTESERegakcaPleeRrepstraP
T-RUE_908TAClluP-hsuP TESER 32TOS,nip-3k3
01T-RUE_908TAClluP-hsuP TESER 32TOS,nip-3k01
T-IBT_908TAClluP-hsuP TESER neerG32TOS,nip-3k3
01T-IBT_908TAClluP-hsuP TESER neerG32TOS,nip-3k01
T-RXE_908TAClluP-hsuP TESER 07CS,nip-3k3
01T-RXE_908TAClluP-hsuP TESER 07CS,nip-3k01
T-IDS_908TAClluP-hsuP TESER neerG07CS,nip-3k3
01T-IDS_908TAClluP-hsuP TESER neerG07CS,nip-3k01
T-RUE_018TACTESERlluP-hsuP32TOS,nip-3k3
01T-RUE_018TACTESERlluP-hsuP32TOS,nip-3k01
T-IBT_018TAC
01T-IBT_018TAC
_018TACRXET-lluP-hsuPTESER
_018TACRXE01T-lluP-hsuPTESER
T-IDS_018TAC
01T-IDS_018TAC
Insert threshold suffix (L, M, J, T, S, R or Z) into the blank position. Example: CAT809LTBI-T for 4.63 V.
lluP-hsuPTESER
lluP-hsuPTESER
lluP-hsuPTESER
lluP-hsuPTESER
TOP MARKING
32TOSneerG32TOS07CSneerG07CS
L908TACMYAAMYBD_AF_AG
M908TACMYBAMYCD_BF_BG
J908TACMYWCMYAD_GF_GG
T908TACMYCAMYFD_EF_EG
S908TACMYDAMYED_DF_DG
R908TACMYFAMYDD_CF_CG
Z908TACMYFCMYGD_FF_FG
neerG32TOS,nip-3k3
neerG32TOS,nip-3k01
07CS,nip-3k3
07CS,nip-3k01
neerG07CS,nip-3k3
neerG07CS,nip-3k01
L018TACMYGAMYKC_HF_HG
M018TACMYHAMYLC_JF_JG
J018TACMYIAMYJC_PF_PG
T018TACMYJAMYPC_MF_MG
S018TACMYKAMYNC_LF_LG
R018TACMYLAMYMC_KF_KG
Z018TACMYGCMYRC_NF_NG
Where YM stands for Year and Month for the SOT23 package and the blank is replaced by the assembly location for the SC70 package.
Doc. No. 3004, Rev. S Patent Pending
2
PIN DESCRIPTIONS
CAT809, CAT810
Pin Number
Name Description
CAT809 CAT810
1 1 GND Ground
2—RESET Active LOW reset. RESET is asserted if V
falls below the reset threshold
CC
and remains low for at least 140ms after VCC rises above the reset threshold.
— 2 RESET Active HIGH reset. RESET is asserted if VCC falls below the reset
threshold and remains high for at least 140ms after VCC rises above
the reset threshold.
33VCCPower supply voltage that is monitored.
Patent Pending Doc. No. 3004, Rev. S
3
CAT809, CAT810
ABSOLUTE MAXIMUM RATINGS*
Any pin with respect to ground .......... -0.3 V to +6.0 V
Input Current, VCC............................................. 20 mA
Output Current, RESET, RESET ...................... 20 mA
Rate of Rise, V
.............................................................
CC
Continuous Power Dissipation
Derate 2.2mW/˚C above 70˚C (SC70)......... 175 mW
Derate 4mW/˚C above 70˚C (SOT23) ......... 320 mW
100 V/µs
Operating Temperature Range........... -40°C to +85°C
Storage Temperature Range............ -65°C to +105°C
Lead Soldering Temperature (10 sec).............. 300°C
*COMMENT
Stresses above those listed under “Absolute Maximum Ratings” may
cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions
outside of those listed in the operational sections of this specification is not
implied. Exposure to any absolute maximum rating for extended periods
may affect device performance and reliability.
ELECTRICAL CHARACTERISTICS
= Full range, TA = -40°C to +85°C unless otherwise noted. Typical values at TA = +25˚C and V
V
CC
L/M/J versions, V
Parameter Symbol Conditions Min Typ Max Units
VCC Range TA = 0˚C to +70˚C 1.0 5.5
Supply Current I
Reset
Threshold
Voltage
= 3.3 V for the T/S versions, V
CC
TA = -40˚C to +85˚C 1.2 5.5
CC
V
TH
TA = -40˚C to +85˚C
L Threshold
M Threshold
J Threshold
T Threshold
S Threshold
R Threshold
Z Threshold
= 3 V for the R version and V
CC
VCC < 5.5 V, J/L/M 8 20
VCC < 3.6 V, R/S/T/Z 6 15
TA = +25˚C 4.56 4.63 4.70
TA = -40˚C to +85˚C 4.50 4.75
TA = +25˚C 4.31 4.38 4.45
TA = -40˚C to +85˚C 4.25 4.50
TA = +25˚C 3.93 4.00 4.06
TA = -40˚C to +85˚C 3.89 4.10
TA = +25˚C 3.04 3.08 3.11
TA = -40˚C to +85˚C 3.00 3.15
TA = +25˚C 2.89 2.93 2.96
TA = -40˚C to +85˚C 2.85 3.00
TA = +25˚C 2.59 2.63 2.66
TA = -40˚C to +85˚C 2.55 2.70
TA = +25˚C 2.28 2.32 2.35
TA = -40˚C to +85˚C 2.25 2.38
= 2.5 V for the Z version.
CC
= 5 V for the
CC
µA
V
V
Doc. No. 3004, Rev. S Patent Pending
4
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