74HCT85D,653

74HC85; 74HCT85 4-bit magnitude comparator Rev. 3 — 20 April 2018 1 Product data sheet General description 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=B and QAB, IA=B and IAB, QA=B and QAB A2 B2 IAB A1 B1 QAB 5 12 A1 QA>B 5 12 A1 QA=B 6 11 B1 QA=B 6 11 B1 10 A0 QAB output QA=B 6 A=B output QA B2 X X X X X H L L A3 = B3 A2 < B2 X X X X X L H L A3 = B3 A2 = B2 A1 > B1 X X X X H L L A3 = B3 A2 = B2 A1 < B1 X X X X L H L A3 = B3 A2 = B2 A1 = B1 A0 > B0 X X X H L L A3 = B3 A2 = B2 A1 = B1 A0 < B0 X X X L H L A3 = B3 A2 = B2 A1 = B1 A0 = B0 H L L H L L A3 = B3 A2 = B2 A1 = B1 A0 = B0 L H L L H L A3 = B3 A2 = B2 A1 = B1 A0 = B0 L L H L L H A3 = B3 A2 = B2 A1 = B1 A0 = B0 X X H L L H A3 = B3 A2 = B2 A1 = B1 A0 = B0 H H L L L L A3 = B3 A2 = B2 A1 = B1 A0 = B0 L L L H H L 8 Limiting values Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V) Symbol Parameter VCC supply voltage IIK input clamping current Conditions Min Max Unit -0.5 +7 V VI < -0.5 V or VI > VCC + 0.5 V [1] - ±20 mA [1] - ±20 mA - ±25 mA IOK output clamping current VO < -0.5 V or VO > VCC + 0.5 V IO output current -0.5 V < VO < VCC + 0.5 V ICC supply current - 50 mA IGND ground current -50 - mA Tstg storage temperature -65 +150 °C - 500 mW Ptot total power dissipation Tamb = -40 °C to +125 °C [2] [1] The input and output voltage ratings may be exceeded if the input and output current ratings are observed. [2] For SO16 Packages: Ptot derates linearly with 8 mW/K above 70 °C. For (T)SSOP16 Packages: Ptot derates linearly with 5.5 mW/K above 60 °C. 74HC_HCT85 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 20 April 2018 © Nexperia B.V. 2018. All rights reserved. 5 / 19 74HC85; 74HCT85 Nexperia 4-bit magnitude comparator 9 Recommended operating conditions Table 5. Recommended operating conditions Voltages are referenced to GND (ground = 0 V) Symbol Parameter Conditions 74HC85 74HCT85 Unit Min Typ Max Min Typ Max 2.0 5.0 6.0 4.5 5.0 5.5 V VCC supply voltage VI input voltage 0 - VCC 0 - VCC V VO output voltage 0 - VCC 0 - VCC V Tamb ambient temperature -40 - +125 -40 - +125 °C Δt/ΔV input transition rise and fall rate VCC = 2.0 V - - 625 - - - ns/V VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V VCC = 6.0 V - - 83 - - - ns/V 10 Static characteristics Table 6. Static characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V). Symbol Parameter Conditions 25 °C -40 °C to +85 °C -40 °C to +125 °C Min Typ Max Min Max Min Max Unit 74HC85 VIH VIL VOH VOL HIGH-level input VCC = 2.0 V voltage VCC = 4.5 V 1.5 1.2 - 1.5 - 1.5 - V 3.15 2.4 - 3.15 - 3.15 - V VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V LOW-level input VCC = 2.0 V voltage VCC = 4.5 V - 0.8 0.5 - 0.5 - 0.5 V - 2.1 1.35 - 1.35 - 1.35 V VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V IO = -20 μA; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V IO = -20 μA; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V IO = -20 μA; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V IO = -4.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V IO = -5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V IO = 20 μA; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V IO = 20 μA; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V IO = 20 μA; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V IO = 4.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V IO = 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V HIGH-level output voltage LOW-level output voltage 74HC_HCT85 Product data sheet VI = VIH or VIL VI = VIH or VIL All information provided in this document is subject to legal disclaimers. Rev. 3 — 20 April 2018 © Nexperia B.V. 2018. All rights reserved. 6 / 19 74HC85; 74HCT85 Nexperia 4-bit magnitude comparator Symbol Parameter Conditions 25 °C -40 °C to +85 °C -40 °C to +125 °C Min Typ Max Min Max Min Max Unit II input leakage current VI = VCC or GND; VCC = 6.0 V - - ±0.1 - ±1 - ±1 μA ICC supply current VI = VCC or GND; IO = 0 A; VCC = 6.0 V - - 8.0 - 80 - 160 μA CI input capacitance - 3.5 - - - - - pF 74HCT85 VIH HIGH-level input VCC = 4.5 V to 5.5 V voltage 2.0 1.6 - 2.0 - 2.0 - V VIL LOW-level input VCC = 4.5 V to 5.5 V voltage - 1.2 0.8 - 0.8 - 0.8 V VOH HIGH-level output voltage IO = -20 μA 4.4 4.5 - 4.4 - 4.4 - V IO = -4.0 mA 3.98 4.32 - 3.84 - 3.7 - V IO = 20 μA - 0 0.1 - 0.1 - 0.1 V IO = 4.0 mA - 0.15 0.26 - 0.33 - 0.4 V VOL LOW-level output voltage VI = VIH or VIL; VCC = 4.5 V VI = VIH or VIL; VCC = 4.5 V II input leakage current VI = VCC or GND; VCC = 5.5 V - - ±0.1 - ±1 - ±1 μA ICC supply current VI = VCC or GND; IO = 0 A; VCC = 5.5 V - - 8.0 - 80 - 160 μA ΔICC additional supply per input pin; VI = VCC - 2.1 V; other inputs at VCC or GND; current VCC = 4.5 V to 5.5 V; IO = 0 A IAB inputs - 100 360 - 450 - 490 μA An, Bn and IA=B inputs - 150 540 - 675 - 735 μA - 3.5 - - - - - pF CI input capacitance 74HC_HCT85 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 3 — 20 April 2018 © Nexperia B.V. 2018. All rights reserved. 7 / 19 74HC85; 74HCT85 Nexperia 4-bit magnitude comparator 11 Dynamic characteristics Table 7. Dynamic characteristics At recommended operating conditions; voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit, see Figure 8 Symbol Parameter Conditions 25 °C -40 °C to +85 °C -40 °C to +125 °C Unit Min Typ Max Min Max Min Max VCC = 2.0 V - 63 195 - 245 - 295 ns VCC = 4.5 V - 23 39 - 49 - 59 ns VCC = 6.0 V - 18 33 - 42 - 50 ns VCC = 5.0 V; CL = 15 pF - 20 - - - - - ns VCC = 2.0 V - 58 175 - 220 - 265 ns VCC = 4.5 V - 21 35 - 44 - 53 ns VCC = 6.0 V - 17 30 - 37 - 45 ns VCC = 5.0 V; CL = 15 pF - 18 - - - - - ns VCC = 2.0 V - 50 140 - 175 - 210 ns VCC = 4.5 V - 18 28 - 35 - 42 ns VCC = 6.0 V - 14 24 - 30 - 36 ns VCC = 5.0 V; CL = 15 pF - 15 - - - - - ns VCC = 2.0 V - 39 120 - 150 - 180 ns VCC = 4.5 V - 14 24 - 30 - 36 ns VCC = 6.0 V - 11 20 - 26 - 31 ns - 11 - - - - - ns VCC = 2.0 V - 19 75 - 95 - 110 ns VCC = 4.5 V - 7 15 - 19 - 22 ns - 6 13 - 16 - 19 ns - 18 - - - - - pF 74HC85 tpd propagation delay An, Bn to QA>B; An, Bn to QAB to QAB; An, Bn to QAB to QA