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1、 1 General description The 74HC125 74HCT125 is a quad buffer line driver with 3 state outputs controlled by the output enable inputs nOE A HIGH on nOE causes the outputs to assume a high impedance OFF state Inputs include clamp diodes This enables the use of current limiting resistors to interface i
2、nputs to voltages in excess of VCC 2 Features and benefits Complies with JEDEC standard no 7A Input levels The 74HC125 CMOS levels The 74HCT125 TTL levels ESD protection HBM JESD22 A114F exceeds 2000 V MM JESD22 A115 A exceeds 200 V Multiple package options Specified from 40 C to 85 C and from 40 C
3、to 125 C 3 Ordering information 74HC125 74HCT125 Quad buffer line driver 3 state Rev 4 10 January 2013Product data sheet Table 1 Ordering information Type numberPackage Temperature rangeNameDescriptionVersion 74HC125N 40 C to 125 CDIP14plastic dual in line package 14 leads 300 mil SOT27 1 74HCT125N
4、74HC125D 40 C to 125 CSO14plastic small outline package 14 leads body width 3 9 mm SOT108 1 74HCT125D 74HC125DB 40 C to 125 CSSOP14plastic shrink small outline package 14 leads body width 5 3 mm SOT337 1 74HCT125DB 74HC125PW 40 C to 125 CTSSOP14plastic thin shrink small outline package 14 leads body
5、 width 4 4 mm SOT402 1 74HCT125PW 74HC HCT125All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Product data sheetRev 4 10 January 2013 2 of 17 NXP Semiconductors74HC125 74HCT125 Quad buffer line driver 3 state 4 Functional diagram 5 Pinning in
6、formation 5 1Pinning Fig 1 Logic symbolFig 2 IEC logic symbolFig 3 Logic diagram one buffer mna228 1A1Y2 1 3 1OE 2A2Y5 4 6 2OE 3A3Y9 10 8 3OE 4A4Y12 13 11 4OE mna229 1 EN1 1 3 2 4 6 5 10 8 9 13 11 12 mna227 nOE nAnY Fig 4 Pin configuration DIP14 SO14 and T SSOP14 74HC125 74HCT125 1OEVCC 1A4OE 1Y4A 2
7、OE4Y 2A3OE 2Y3A GND3Y 1 2 3 4 5 6 78 10 9 12 11 14 13 aaa 003129 74HC HCT125All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Product data sheetRev 4 10 January 2013 3 of 17 NXP Semiconductors74HC125 74HCT125 Quad buffer line driver 3 state 5
8、2Pin description 6 Functional description 1 H HIGH voltage level L LOW voltage level X don t care Z high impedance OFF state 7 Limiting values 1 The input and output voltage ratings may be exceeded if the input and output current ratings are observed 2 For DIP14 package Ptot derates linearly with 12
9、 mW K above 70 C For SO14 package Ptot derates linearly with 8 mW K above 70 C For T SSOP14 packages Ptot derates linearly with 5 5 mW K above 60 C Table 2 Pin description SymbolPinDescription 1OE 2OE 3OE 4OE1 4 10 13output enable input active LOW 1A 2A 3A 4A2 5 9 12data input 1Y 2Y 3Y 4Y3 6 8 11dat
10、a output GND7ground 0 V VCC14supply voltage Table 3 Function table 1 ControlInputOutput nOEnAnY LLL HH HXZ Table 4 Limiting values In accordance with the Absolute Maximum Rating System IEC 60134 Voltages are referenced to GND ground 0 V SymbolParameterConditionsMinMaxUnit VCCsupply voltage 0 5 7V II
11、Kinput clamping currentVI VCC 0 5 V 1 20mA IOKoutput clamping currentVO VCC 0 5 V 1 20mA IOoutput currentVO 0 5 V to VCC 0 5 V 35mA ICCsupply current 70mA IGNDground current 70mA Tstgstorage temperature 65 150 C Ptottotal power dissipation 2 DIP14 package 750mW SO14 and T SSOP14 packages 500mW 74HC
12、HCT125All information provided in this document is subject to legal disclaimers NXP B V 2013 All rights reserved Product data sheetRev 4 10 January 2013 4 of 17 NXP Semiconductors74HC125 74HCT125 Quad buffer line driver 3 state 8 Recommended operating conditions 9 Static characteristics Table 5 Reco
13、mmended operating conditions Voltages are referenced to GND ground 0 V SymbolParameterConditions74HC12574HCT125Unit MinTypMaxMinTypMax VCCsupply voltage2 05 06 04 55 05 5V VIinput voltage0 VCC0 VCCV VOoutput voltage0 VCC0 VCCV Tambambient temperature 40 25 125 40 25 125 C t Vinput transition rise an
14、d fall rateVCC 2 0 V 625 ns V VCC 4 5 V 1 67139 1 67139ns V VCC 6 0 V 83 ns V Table 6 Static characteristics At recommended operating conditions voltages are referenced to GND ground 0 V Symbol ParameterConditions25 C 40 C to 85 C 40 C to 125 C Unit MinTypMaxMinMaxMinMax 74HC125 VIHHIGH level input
15、voltage VCC 2 0 V1 51 2 1 5 1 5 V VCC 4 5 V3 152 4 3 15 3 15 V VCC 6 0 V4 23 2 4 2 4 2 V VILLOW level input voltage VCC 2 0 V 0 80 5 0 5 0 5V VCC 4 5 V 2 11 35 1 35 1 35V VCC 6 0 V 2 81 8 1 8 1 8V VOHHIGH level output voltage VI VIHor VIL IO 20 A VCC 2 0 V1 92 0 1 9 1 9 V IO 20 A VCC 4 5 V4 44 5 4 4
16、 4 4 V IO 20 A VCC 6 0 V5 96 0 5 9 5 9 V IO 6 0 mA VCC 4 5 V3 984 32 3 84 3 7 V IO 7 8 mA VCC 6 0 V5 485 81 5 34 5 2 V VOLLOW level output voltage VI VIHor VIL IO 20 A VCC 2 0 V 00 1 0 1 0 1V IO 20 A VCC 4 5 V 00 1 0 1 0 1V IO 20 A VCC 6 0 V 00 1 0 1 0 1V IO 6 0 mA VCC 4 5 V 0 150 26 0 33 0 4V IO 7 8 mA VCC 6 0 V 0 160 26 0 33 0 4V IIinput leakage current VI VCCor GND VCC 6 0 V 0 1 1 0 1 0 A IOZOFF state output current VI VIHor VIL VO VCCor GND VCC 6 0 V 0 5 5 0 10 0 A 74HC HCT125All information
