HD74LS85 4-bit Magnitude Comparator REJ03D0421–0200 Rev.2.00 Feb.18.2005 This four bit magnitude comparator performs comparison of straight binary and straight BCD (8-4-2-1) codes. Three fully decoded decisions about two 4-bit words (A, B) are made and are externally available at three outputs. This device is fully expandable to any number of bits without external gates. Words of greater length may be compared by connecting comparators in cascade. The A > B, A < B, and A = B outputs of a stage handling less-significant bits. The stage handling the least- significant bits must have a high-level voltage applied to the A β B input. The cascading path is implemented with only a two-gate-level delay to reduce overall comparison times for long words. Features • Ordering Information Part Name Package Type Package Code (Previous Code) Package Abbreviation Taping Abbreviation (Quantity) HD74LS85P DILP-16 pin PRDP0016AE-B (DP-16FV) P — HD74LS85FPEL SOP-16 pin (JEITA) PRSP0016DH-B (FP-16DAV) FP EL (2,000 pcs/reel) Note: Please consult the sales office for the above package availability. Pin Arrangement B3 Data Input 1 A<B 2 A<B A=B 3 A>B Cascade Inputs Outputs 16 VCC A3 15 A3 A=B In B2 14 B2 4 A>B A2 13 A2 A>B 5 A>B A1 12 A1 A=B 6 A=B Out B1 11 B1 A<B 7 A<B 10 A0 GND 8 9 B0 B3 A0 B0 (Top view) Rev.2.00, Feb.18.2005, page 1 of 6 Data Inputs HD74LS85 Function Table A3, B3 A3 > B3 A3 < B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 A3 = B3 Inputs A2, B2 A1, B1 X X X X A2 > B2 X A2 < B2 X A2 = B2 A1 > B1 A2 = B2 A1 < B1 A2 = B2 A1 = B1 A2 = B2 A1 = B1 A2 = B2 A1 = B1 A2 = B2 A1 = B1 A2 = B2 A1 = B1 A2 = B2 A1 = B1 A2 = B2 A1 = B1 A0, B0 X X X X X X A0 > B0 A0 < B0 A0 = B0 A0 = B0 A0 = B0 A0 = B0 A0 = B0 Cascading Inputs A>B A<B A=B X X X X X X X X X X X X X X X X X X X X X X X X H L L L H L X X H H H L L L L A>B H L H L H L H L H L L L H Outputs A<B L H L H L H L H L H L L H H; high level, L; low level, X; irrelevant Block Diagram A3 B3 A>B A2 B2 A<B A=B A>B A=B A1 B1 A<B A0 B0 Absolute Maximum Ratings Item Symbol Ratings Supply voltage VCC 7 Input voltage VIN 7 Power dissipation PT 400 Storage temperature Tstg –65 to +150 Note: Voltage value, unless otherwise noted, are with respect to network ground terminal. Rev.2.00, Feb.18.2005, page 2 of 6 Unit V V mW °C A=B L L L L L L L L L L H L L HD74LS85 Recommended Operating Conditions Item Symbol VCC IOH IOL Topr Supply voltage Output current Operating temperature Min 4.75 — — –20 Typ 5.00 — — 25 Max 5.25 –400 8 75 Unit V µA mA °C Electrical Characteristics (Ta = –20 to +75 °C) Item Input voltage Symbol VIH VIL min. 2.0 — typ.* — — max. — 0.8 Unit V V VOH 2.7 — — V — — 0.4 — — 0.5 — — 20 — — 60 — — –0.4 — — –1.2 — — 0.1 — — 0.3 IOS –20 — ICC VIK — — 10.4 — Output voltage VOL Input current A < B, A > B inputs Other inputs IIH A < B, A > B inputs Other inputs IIL A < B, A > B inputs Other inputs II Short-circuit output current Supply current** Input clamp voltage V Condition VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V, IOH = –400 µA IOL = 4 mA VCC = 4.75 V, VIH = 2 V, VIL = 0.8 V IOL = 8 mA µA VCC = 5.25 V, VI = 2.7 V mA VCC = 5.25 V, VI = 0.4 V mA VCC = 5.25 V, VI = 7 V –100 mA VCC = 5.25 V 20 –1.5 mA V VCC = 5.25 V VCC = 4.75 V, IIN = –18 mA Note: * VCC = 5 V, Ta = 25°C ** ICC is measured with outputs open, A = B grounded, and all other inputs at 4.5 V. Switching Characteristics (VCC = 5 V, Ta = 25°C) Item Symbol Inputs Outputs tPLH Any A or B data input A < B, A > B A=B Propagation delay time tPHL Any A or B data input A < B, A > B A=B tPHL tPHL tPLH tPHL tPLH tPHL A < B or A=B A>B A=B A=B A > B or A=B A<B Rev.2.00, Feb.18.2005, page 3 of 6 Number of gate levels 1 2 min. typ. max. — — 14 19 — — 3 4 1 2 — — — — 24 27 11 15 36 45 — — 3 4 1 1 2 2 1 1 — — — — — — — — 20 23 14 11 13 13 14 11 30 45 22 17 20 26 22 17 Unit Condition ns CL = 15 pF, RL = 2 kΩ HD74LS85 Testing Method Test Circuit VCC 4.5V See Testing Table P.G. Zout = 50Ω RL A3 B3 A2 B2 A1 B1 A0 B0 Input Load circuit 1 A>B CL Output Same as Load Circuit 1. A=B Output Same as Load Circuit 1. A<B A<B A=B A>B Notes: Output 1. CL includes probe and jig capacitance. 2. All diodes are 1S2074(H). Waveform tTHL tTLH 90% 1.3 V Input 3V 90% 1.3 V 10% 10% 0V tPHL tPLH VOH In phase output (A) 1.3 V 1.3 V VOL tPHL tPLH VOH Out of phase output (B) Note: 1.3 V 1.3 V Input pulse; tTLH ≤ 15 ns, tTHL ≤ 6 ns, PRR = 1 MHz, duty cycle = 50% Rev.2.00, Feb.18.2005, page 4 of 6 VOL HD74LS85 Testing Table Item tPLH tPHL A3 IN 4.5 v GND GND GND GND GND GND GND GND GND GND B3 4.5 v IN GND GND GND GND GND GND GND GND GND GND A2 4.5 v GND IN 4.5 v GND GND GND GND GND GND GND GND B2 GND 4.5 v 4.5 v IN GND GND GND GND GND GND GND GND Inputs A1 B1 GND GND GND GND 4.5 v GND GND 4.5 v IN 4.5 v 4.5 v IN GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND Rev.2.00, Feb.18.2005, page 5 of 6 GND A0 GND GND GND GND 4.5 v GND IN 4.5 v IN 4.5 v GND GND B0 GND GND GND GND GND 4.5 v 4.5 v IN 4.5 v IN GND GND A>B GND GND GND GND GND GND 4.5 v GND GND GND IN GND A=B GND GND GND GND GND GND GND GND 4.5 v 4.5 v GND IN GND GND GND GND Output waveforms A<B A>B A=B A<B GND A — B GND B — A GND A — B GND B — A GND A — B GND B — A GND A — B 4.5 v B — A GND — A B GND B A — GND — — B GND B A B IN B — — HD74LS85 Package Dimensions JEITA Package Code P-DIP16-6.3x19.2-2.54 RENESAS Code PRDP0016AE-B MASS[Typ.] 1.05g Previous Code DP-16FV D 9 E 16 1 8 b3 0.89 Z A1 A Reference Symbol L e Nom θ c e1 D 19.2 E 6.3 JEITA Package Code P-SOP16-5.5x10.06-1.27 RENESAS Code PRSP0016DH-B *1 Previous Code FP-16DAV 7.4 A1 0.51 b p 0.40 b 3 0.48 0.56 1.30 c 0.19 θ 0° e 2.29 0.25 0.31 2.54 2.79 15° 1.12 L 2.54 MASS[Typ.] 0.24g NOTE) 1. DIMENSIONS"*1 (Nom)"AND"*2" DO NOT INCLUDE MOLD FLASH. 2. DIMENSION"*3"DOES NOT INCLUDE TRIM OFFSET. D F 16 20.32 5.06 Z ( Ni/Pd/Au plating ) Max 7.62 1 A bp e Dimension in Millimeters Min 9 c HE *2 E bp Index mark Reference Symbol Terminal cross section ( Ni/Pd/Au plating ) 1 Z *3 bp Nom D 10.06 E 5.50 Max 10.5 A2 8 e Dimension in Millimeters Min x A1 M 0.00 0.10 0.20 0.34 0.40 0.46 0.15 0.20 0.25 7.80 8.00 A L1 2.20 bp b1 c A c A1 θ y L Detail F 1 θ 0° HE 7.50 e 1.27 x 0.12 y 0.15 0.80 Z L L Rev.2.00, Feb.18.2005, page 6 of 6 8° 0.50 1 0.70 1.15 0.90 Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan Keep safety first in your circuit designs! 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. 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