HCF4532B 8-BIT PRIORITY ENCODER ■ ■ ■ ■ ■ ■ ■ ■ ■ CONVERTS FROM 1 TO 8 TO INPUTS BINARY PROVIDES CASCADING FEATURE TO HANDLE ANY NUMBER OF INPUTS GROUP SELECT INDICATES ONE OR MORE PRIORITY INPUTS QUIESCENT CURRENT SPECIFIED UP TO 20V STANDARDIZED SYMMETRICAL OUTPUT CHARACTERISTICS 5V, 10V AND 15V PARAMETRIC RATINGS INPUT LEAKAGE CURRENT II = 100nA (MAX) AT VDD = 18V TA = 25°C 100% TESTED FOR QUIESCENT CURRENT MEETS ALL REQUIREMENTS OF JEDEC JESD13B "STANDARD SPECIFICATIONS FOR DESCRIPTION OF B SERIES CMOS DEVICES" DESCRIPTION HCF4532B is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology available in DIP and SOP packages. HCF4532B consists of a combinational logic that encodes the highest priority input (D7-D0) to a 3-bit binary code. The eight inputs, D7 through D0, DIP SOP ORDER CODES PACKAGE TUBE T&R DIP SOP HCF4532BEY HCF4532BM1 HCF4532M013TR each have an assigned priority. D7 is the highest priority and D0 is the lowest. The priority encoder is inhibited when the chip enable input EI is low. When EI is high, the binary representation of the highest priority input appears on output lines Q2-Q0, and the group select line GS is high to indicate that priority inputs are present. The enable out (EO) is high when no priority inputs are present. If any input is high, EO is low and all cascaded lower order stages are disabled. PIN CONNECTION May 2004 Rev. 2 1/13 HCF4532B Figure 1: Input Equivalent Circuit Table 1: Pin Description PIN N° 10, 11, 12, 13, 1, 2, 3, 4 9, 7, 6 SYMBOL NAME AND FUNCTION D0 to D7 Data Inputs 5 Q0 to Q2 EI Chip Enable Input 15 EO Enable Output 14 GS VSS Group Select Line 8 16 VDD Positive Supply Voltage Data Output Lines Negative Supply Voltage Figure 2: Functional Diagram Table 2: Truth Table INPUTS OUTPUTS EI D7 D6 D5 D4 D3 D2 D1 D0 GS Q2 Q1 Q0 EO L H H H H H H H H H X L H L L L L L L L X L X H L L L L L L X L X X H L L L L L X L X X X H L L L L X L X X X X H L L L X L X X X X X H L L X L X X X X X X H L X L X X X X X X X H L L H H H H H H H H L L H H H H L L L L L L H H L L H H L L L L H L H L H L H L L H L L L L L L L L X : Don’t Care 2/13 HCF4532B Figure 3: Logic Diagram Table 3: Absolute Maximum Ratings Symbol VDD Parameter Supply Voltage Value Unit -0.5 to +22 V VI DC Input Voltage -0.5 to VDD + 0.5 V II DC Input Current ± 10 mA 200 100 mW mW Top Power Dissipation per Package Power Dissipation per Output Transistor Operating Temperature -55 to +125 °C Tstg Storage Temperature -65 to +150 °C PD Absolute Maximum Ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. All voltage values are referred to VSS pin voltage. 3/13 HCF4532B Table 4: Recommended Operating Conditions Symbol VDD Parameter Supply Voltage VI Input Voltage Top Operating Temperature Value Unit 3 to 20 V 0 to VDD V -55 to 125 °C Table 5: DC Specifications Test Condition Symbol IL VOH VOL VIH VIL IOH IOL II CI Parameter Quiescent Current High Level Output Voltage Low Level Output Voltage VI (V) 0/5 0/10 0/15 0/20 0/5 0/10 0/15 5/0 10/0 15/0 High Level Input Voltage Low Level Input Voltage Output Drive Current Output Sink Current Input Leakage Current Input Capacitance VO (V) 0/5 0/5 0/10 0/15 0/5 0/10 0/15 0/18 0.5/4.5 1/9 1.5/13.5 4.5/0.5 9/1 13.5/1.5 2.5 4.6 9.5 13.5 0.4 0.5 1.5 Value |IO| VDD (µA) (V) <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 <1 Any Input Any Input 5 10 15 20 5 10 15 5 10 15 5 10 15 5 10 15 5 5 10 15 5 10 15 18 TA = 25°C Min. Typ. Max. 0.04 0.04 0.04 0.08 5 10 20 100 4.95 9.95 14.95 -40 to 85°C -55 to 125°C Min. Min. 150 300 600 3000 4.95 9.95 14.95 0.05 0.05 0.05 4.95 9.95 14.95 3.5 7 11 1.5 3 4 -3.2 -1 -2.6 -6.8 1 2.6 6.8 ±0.1 5 7.5 0.05 0.05 0.05 1.5 3 4 -1.1 -0.36 -0.9 -2.4 0.36 0.9 2.4 The Noise Margin for both "1" and "0" level is: 1V min. with VDD=5V, 2V min. with VDD=10V, 2.5V min. with VDD=15V 4/13 V V 1.5 3 4 ±1 µA V 3.5 7 11 -1.1 -0.36 -0.9 -2.4 0.36 0.9 2.4 ±10-5 Max. 150 300 600 3000 0.05 0.05 0.05 3.5 7 11 -1.36 -0.44 -1.1 -3.0 0.44 1.1 3.0 Max. Unit V mA mA ±1 µA pF HCF4532B Table 6: Dynamic Electrical Characteristics (Tamb = 25°C, CL = 50pF, RL = 200KΩ, tr = tf = 20 ns) Test Condition Symbol Parameter VDD (V) tPLH tPHL Propagation Delay Time (EI to EO, EI to GS) tPLH tPHL Propagation Delay Time (EI to Qm, Dn to GS) tPLH tPHL Propagation Delay Time (Dn to Qm) tTLH tTHL Transition Time 5 10 15 5 10 15 5 10 15 5 10 15 Value (*) Min. Unit Typ. Max. 110 55 45 170 85 65 220 110 85 100 50 40 220 110 85 340 170 125 440 220 160 200 100 80 ns ns ns ns (*) Typical temperature coefficient for all VDD value is 0.3 %/°C. TYPICAL APPLICATIONS Figure 4: 16-Level Priority Encoder 5/13 HCF4532B Figure 5: 0 To 9 Keyboard Encoder Table 7: Truth Table INPUTS OUTPUTS D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 GS Q3’ Q2’ Q1’ Q0 H L L L L L L L L L X H L L L L L L L L X X H L L L L L L L X X X H L L L L L L X X X X H L L L L L X X X X X H L L L L X X X X X X H L L L X X X X X X X H L L X X X X X X X X H L X X X X X X X X X H L L H H H H H H H H H H L L L L L L L L L L H H H H L L L L L L H H L L H H L L H L H L H L H L H L X : Don’t Care 6/13 HCF4532B Figure 6: Digital To Analog Conversion Figure 7: Test Circuit CL = 50pF or equivalent (includes jig and probe capacitance) RL = 200KΩ RT = ZOUT of pulse generator (typically 50Ω) 7/13 HCF4532B Figure 8: Waveform - Propagation Delay Times (f=1MHz; 50% duty cycle) 8/13 HCF4532B Plastic DIP-16 (0.25) MECHANICAL DATA mm. inch DIM. MIN. a1 0.51 B 0.77 TYP MAX. MIN. TYP. MAX. 0.020 1.65 0.030 0.065 b 0.5 0.020 b1 0.25 0.010 D 20 0.787 E 8.5 0.335 e 2.54 0.100 e3 17.78 0.700 F 7.1 0.280 I 5.1 0.201 L Z 3.3 0.130 1.27 0.050 P001C 9/13 HCF4532B SO-16 MECHANICAL DATA DIM. mm. MIN. TYP A a1 inch MAX. MIN. TYP. 1.75 0.1 0.068 0.2 a2 MAX. 0.004 0.008 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.5 0.019 c1 45˚ (typ.) D 9.8 E 5.8 10 0.385 6.2 0.228 0.393 0.244 e 1.27 0.050 e3 8.89 0.350 F 3.8 4.0 0.149 0.157 G 4.6 5.3 0.181 0.208 L 0.5 1.27 0.019 0.050 M S 0.62 8 0.024 ˚ (max.) PO13H 10/13 HCF4532B Tape & Reel SO-16 MECHANICAL DATA mm. inch DIM. MIN. A TYP MAX. MIN. 330 MAX. 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 TYP. 0.504 22.4 0.519 0.882 Ao 6.45 6.65 0.254 0.262 Bo 10.3 10.5 0.406 0.414 Ko 2.1 2.3 0.082 0.090 Po 3.9 4.1 0.153 0.161 P 7.9 8.1 0.311 0.319 11/13 HCF4532B Table 8: Revision History Date Revision 07-May-2004 2 12/13 Description of Changes Mistake Truth Table - Table 2 - Pag. 2 HCF4532B Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. 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