74HC85; 74HCT85

4-bit magnitude comparator

The 74HC85; 74HCT85 is a 4-bit magnitude comparator that can be expanded to almost any length. They perform comparison of two 4-bit binary, BCD or other monotonic codes and present the three possible magnitude results at the outputs (QA>B,QA=BandQA<B). The 4-bit inputs are weighted (A0 to A3 and B0 to B3), where A3 and B3 are the most significant bits. For proper compare operation the expander inputs (IA>B,IA=BandIA<B) to the least significant position must be connected as follows: IA<B=IA>B=LOW andIA=B=HIGH. For words greater than 4-bits, units can be cascaded by connecting outputs QA>B, QA=B and QA<B to the corresponding inputs of the significant comparator. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

特性

  • Wide supply voltage range from 2.0 to 6.0 V
  • CMOS low power dissipation
  • High noise immunity
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Input levels:
    • For 74HC85: CMOS level
    • For 74HCT85: TTL level
  • Complies with JEDEC standard: no. 7A
    • JESD8C (2.7 V to 3.6 V)
    • JESD7A (2.0 V to 6.0 V)
  • ESD protection:
    • HBM JESD22-A114-A exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

目标应用

  • Process controllers
  • Servo-motor control

参数类型

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)No of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC85DProduction2.0 - 6.0CMOS± 5.2234low-40~125671.025SO16
74HC85PWProduction2.0 - 6.0CMOS± 5.2234low-40~1251021.028.7TSSOP16
74HCT85DProduction4.5 - 5.5TTL± 4264low-40~125671.024.8SO16

封装

型号封装尺寸版本回流焊/波峰焊包装状态标示可订购的器件编号,(订购码(12NC))
74HC85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC85D74HC85D,653
( 9337 149 50653 )
Bulk Pack, CECCActive74HC85D74HC85D,652
( 9337 149 50652 )
74HC85PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC8574HC85PW,118
( 9351 891 80118 )
Bulk PackActiveHC8574HC85PW,112
( 9351 891 80112 )
74HCT85D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT85D74HCT85D,653
( 9337 154 30653 )
Bulk Pack, CECCActive74HCT85D74HCT85D,652
( 9337 154 30652 )

品质、可靠性及化学成分

型号可订购的器件编号化学成分RoHS / RHF无铅转换日期EFRIFRMTBF(小时)MSLMSL无铅
74HC85D74HC85D,65374HC85Dweek 30, 200484.96.621.51E811
74HC85D74HC85D,65274HC85Dweek 30, 200484.96.621.51E811
74HC85PW74HC85PW,11874HC85PWweek 10, 200584.96.621.51E811
74HC85PW74HC85PW,11274HC85PWweek 10, 200584.96.621.51E811
74HCT85D74HCT85D,65374HCT85Dweek 6, 200484.96.621.51E811
74HCT85D74HCT85D,65274HCT85Dweek 6, 200484.96.621.51E811
品质及可靠性免责声明

文档 (6)

文件名称标题类型日期
74HC_HCT854-bit magnitude comparatorData sheet2018-04-23
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm bodyPackage information2020-04-21
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21

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