CAT811RTBI-T10中文资料
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1CAT811, CAT8124-Pin Microprocessor Power Supply SupervisorsFEATURESsPrecision monitoring of+5.0 V (+/- 5%, +/- 10%, +/- 20%),+3.3 V (+/- 5%, +/ 10%),+3.0 V (+/- 10%) and+2.5 V (+/- 5%) power suppliessOffered in two output configurations:- CAT811: Active LOW reset- CAT812: Active HIGH resetsManual reset inputsDirect replacements for the MAX811 andMAX812 in applications operating over theindustrial temperature range
s Reset valid down to VCC = 1.0 V
s 6 µA power supply currents Power supply transient immunitys Compact 4-pin SOT143 packages Industrial temperature range: -40˚C to +85˚C
© 2004 by Catalyst Semiconductor, Inc., Patent PendingCharacteristics subject to change without noticeDoc. No. 3005, Rev. P
APPLICATIONSsComputerssServerssLaptopssCable modemss Wireless communications
sEmbedded control systemssWhite goodssPower meterssIntelligent instrumentssPDAs and handheld equipment
DESCRIPTIONThe CAT811 and CAT812 are µP supervisory circuitsthat monitor power supplies in digital systems. TheCAT811 and CAT812 are direct replacements for theMAX811 and MAX812 in applications operating over theindustrial temperature range; both have a manual resetinput.These devices generate a reset signal, which is assertedwhile the power supply voltage is below a preset thresholdlevel and for at least 140 ms after the power supply levelhas risen above that level. The underlying floating gatetechnology, AE2(TM) used by Catalyst Semiconductor,makes it possible to offer any custom reset thresholdvalue. Seven industry standard threshold levels areoffered to support +5.0 V, +3.3 V, +3.0 V and +2.5 Vsystems.
The CAT811 features a RESET push-pull output (activeLOW) and the CAT812 features a RESET push-pulloutput (active HIGH).
Fast transients on the power supply are ignored and theoutput is guaranteed to be in the correct state at Vcc
levels as low as 1.0 V.
The CAT811/812 are fully specified over the industrialtemperature range (-40˚C to 85˚C) and are available ina compact 4-pin SOT143 package.
PIN CONFIGURATIONTHRESHOLD SUFFIX SELECTOR
Nominal ThresholdThreshold SuffixVoltageDesignation4.63VL4.38VM4.00VJ3.08VT2.93VS2.63VR2.32VZ
HALOGENFR
EE
TMLEADF
R
EE
1243GND
(RESET)V
CC
CAT811(CAT812)
RESET
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CAT811, CAT812Doc. No. 3005, Rev. PPatent PendingORDERING INFORMATION
Insert threshold suffix (L, M, J, T, S, R or Z) into the blank position. Example: CAT811LTBI-T for 4.63 V, and lead-free SOT143 package.TOP MARKING
Where YM stands for Year and Month.
rebmuNtraPgniredrOytiraloPTESERegakcaPleeRrepstraPT-SUE_118TAClluP-hsuPTESER341TOS,nip-4k301T-SUE_118TAClluP-hsuPTESER341TOS,nip-4k01T-IBT_118TAClluP-hsuPTESERneerG341TOS,nip-4k301T-IBT_118TAClluP-hsuPTESERneerG341TOS,nip-4k01T-SUE_218TACTESERlluP-hsuP341TOS,nip-4k301T-SUE_218TACTESERlluP-hsuP341TOS,nip-4k01T-IBT_218TAClluP-hsuPTESER,nip-4341TOSneerGk301T-IBT_218TAClluP-hsuPTESER,nip-4341TOSneerGk01
341TOSneerG341TOSL118TACMYMAMYHDM118TACMYNAMYJDJ118TACMYZAMYKCT118TACMYPAMYLDS118TACMYQAMYMDR118TACMYRAMYNDZ118TACMYYAMYPCL218TACMYSAMYRDM218TACMYTAMYTDJ218TACMYUAMYUDT218TACMYVAMYVDS218TACMYWAMYWDR218TACMYXAMYXDZ218TACMYICMYYC
元器件交易网www.cecb2b.comCAT811, CAT812
Patent PendingDoc. No. 3005, Rev. PPIN DESCRIPTIONSPin NumberCAT811CAT81211GNDGround2—RESETActive LOW reset. RESET is asserted if VCC falls below the reset threshold
and remains low for at least 140ms after VCC rises above the reset threshold.
—2RESETActive HIGH reset. RESET is asserted if VCC falls below the resetthreshold and remains high for at least 140ms after VCC rises abovethe reset threshold.
33MRManual Reset Input. A logic LOW on MR asserts RESET. RESET remainsactive as long as MR is LOW and for 140ms after MR returns HIGH. Theactive low input has an internal 20kΩ pull-up resistor. The input should be leftopen if not used. It can be driven by TTL or CMOS logic or shorted to groundby a switch.
44VCCPower supply voltage that is monitored.
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