74HCT85D: 4-bit magnitude comparator
The 74HC/1 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.
The 74HC/HCT85 are 4-bit magnitude comparators 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=B and QA The operation of the '85' is described in the function table, showing all possible logic conditions. The upper part of the table describes the normal operation under all conditions that will occur in a single device or in a series expansion scheme. In the upper part of the table the three outputs are mutually exclusive. In the lower part of the table, the outputs reflect the feed forward conditions that exist in the parallel expansion scheme. For proper compare operation the expander inputs (IA>B, IA=B and IA For words greater than 4-bits, units can be cascaded by connecting outputs QAsot109-1_3d
Data Sheets (1)
Name/Description Modified Date 4-bit magnitude comparator (REV 1.0) PDF (67.0 kB) 74HC_HCT85_CNV [English] 01 Dec 1990 Application Notes (2)
Name/Description Modified Date Live Insertion Aspects of Philips Logic Families (REV 1.0) PDF (73.0 kB) AN252 [English] 13 Mar 2013 Pin FMEA 74HC/74HCT family (REV 1.0) PDF (51.0 kB) AN11044 [English] 16 Mar 2011 Users Guides (1)
Name/Description Modified Date HC/T User Guide (REV 1.0) PDF (508.0 kB) HCT_USER_GUIDE [English] 01 Nov 1997 Package Information (1)
Name/Description Modified Date plastic small outline package; 16 leads; body width 3.9 mm (REV 1.0) PDF (192.0 kB) SOT109-1 [English] 08 Feb 2016 Supporting Information (2)
Name/Description Modified Date Footprint for reflow soldering (REV 1.0) PDF (9.0 kB) SO-SOJ-REFLOW [English] 08 Oct 2009 Footprint for wave soldering (REV 1.0) PDF (8.0 kB) SO-SOJ-WAVE [English] 08 Oct 2009 Ordering Information
Product Status Family VCC (V) Function Logic switching levels Description Package version Output drive capability (mA) tpd (ns) No of bits Power dissipation considerations Tamb (Cel) Rth(j-a) (K/W) Ψth(j-top) (K/W) Rth(j-c) (K/W) Package name No of pins 74HCT85D Active HC(T) 4.5 - 5.5 Digital comparators TTL TTL enabled SOT109-1 +/- 4.0 26 4 low -40~125 67 1.0 24.8 SO16 16 Package Information
Product ID Package Description Outline Version Reflow/Wave Soldering Packing Product Status Part NumberOrdering code(12NC) Marking Chemical Content RoHS / Pb Free / RHF LeadFree Conversion Date EFR IFR(FIT) MTBF(hour) MSL MSL LF 74HCT85D SOT109-1 SO-SOJ-REFLOW
SO-SOJ-WAVE
SO-SOJ-REFLOW
SO-SOJ-WAVEReel 13" Q1/T1 CECC Active 74HCT85D,653
(9337 154 30653) 74HCT85D 74HCT85D 
week 6, 2004 84.9 6.62 1.51E8 1 1 Bulk Pack, CECC Active 74HCT85D,652
(9337 154 30652) 74HCT85D 74HCT85D week 6, 2004 84.9 6.62 1.51E8 1 1
- 4-bit magnitude comparator 74HCT85DB
- Live Insertion Aspects of Philips Logic Families 74HC_T_245_Q100
- Pin FMEA 74HC/74HCT family 74HC_T_597_Q100
- HC/T User Guide 74HCU04PW
- plastic small outline package; 16 leads; body width 3.9 mm NPIC6C596A_Q100
- Footprint for reflow soldering NPIC6C596A_Q100
- Footprint for wave soldering NPIC6C596A_Q100
- SA614A
