Revised January 1999 CD4028BC BCD-to-Decimal Decoder General Description Features The CD4028BC is a BCD-to-decimal or binary-to-octal decoder consisting of 4 inputs, decoding logic gates, and 10 output buffers. A BCD code applied to the 4 inputs, A, B, C, and D, results in a high level at the selected 1-of-10 decimal decoded outputs. Similarly, a 3-bit binary code applied to inputs A, B, and C is decoded in octal at outputs 0–7. A high level signal at the D input inhibits octal decoding and causes outputs 0–7 to go LOW. ■ Wide supply voltage range: All inputs are protected against static discharge damage by diode clamps to VDD and VSS. ■ High noise immunity: 3.0V to 15V 0.45 VDD (typ.) ■ Low power TTL compatibility: or 1 driving 74LS fan out of 2 driving 74L ■ Low power ■ Glitch free outputs ■ “Positive logic” on inputs and outputs Applications • Code conversion • Address decoding • Indicator-tube decoder Ordering Code: Package Number Package Description CD4028BCM Order Number M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body CD4028BCN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Pin Assignments for DIP and SOIC Top View © 1999 Fairchild Semiconductor Corporation DS005959.prf www.fairchildsemi.com CD4028BC BCD-to-Decimal Decoder October 1987 CD4028BC Truth Table D C B A 0 1 2 3 4 5 6 7 8 9 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 1 = HIGH Level 0 1 1 1 0 0 0 0 0 0 0 1 0 0 0 = LOW Level 1 0 0 0 0 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0 0 0 0 0 0 0 0 1 1 0 1 0 0 0 0 0 0 0 0 0 1 0 1 0 1 1 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 1 0 1 1 0 1 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 0 1 1 1 1 0 0 0 0 0 0 0 0 0 1 Logic Diagram www.fairchildsemi.com 2 BCD States Extraordinary States Recommended Operating Conditions (Note 2) −0.5 to +18V Supply Voltage (VDD) Supply Voltage (VDD) −0.5 to VDD +0.5V Input Voltage (VIN) −65°C to +150°C Storage Temperature Range (TS) 700 mW Small Outline 500 mW −40°C to +85°C Note 1: “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed, they are not meant to imply that the devices should be operated at these limits. The table of “Recommended Operating Conditions” and “Electrical Characteristics” provides conditions for actual device operation. Lead Temperature (TL) (Soldering, 10 seconds) 0 to VDD V Operating Temperature Range (TA) Power Dissipation (PD) Dual-In-Line 3 to 15V Input Voltage (VIN) Note 2: VSS = 0V unless otherwise specified. 260°C DC Electrical Characteristics (Note 2) Symbol IDD VOL VOH VIL VIH IOL Parameter Quiescent Device Current LOW Level Output Voltage HIGH Level Output Voltage LOW Level Input Voltage HIGH Level Input Voltage LOW Level Output Current (Note 3) IOH HIGH Level Output Current (Note 3) IIN Input Current −40°C Conditions Min Max +25°C Min +85°C Typ Max Min Max Units VDD = 5V, VIN = VDD or VSS 20 0.01 20 150 µA VDD = 10V, VIN = VDD or VSS 40 0.01 40 300 µA VDD = 15V, VIN = VDD or VSS 80 0.02 80 600 µA |IO| < 1 µA, VIL = 0V, VIH = VDD VDD = 5V 0.05 0 0.05 0.05 V VDD = 10V 0.05 0 0.05 0.05 V VDD = 15V 0.05 0 0.05 0.05 V |IO| < 1 µA, VIL = 0V, VIH = VDD VDD = 5V 4.95 4.95 5 4.95 V VDD = 10V 9.95 9.95 10 9.95 V VDD = 15V 14.95 14.95 15 14.95 V |IO| < 1 µA VDD = 5V, VO = 0.5V or 4.5V 1.5 2.25 1.5 1.5 V VDD = 10V, VO = 1V or 9V 3.0 4.5 3.0 3.0 V VDD = 15V, VO = 1.5V or 13.5V 4.0 6.75 4.0 4.0 V |IO| < 1 µA VDD = 5V, VO = 0.5V or 4.5V 3.5 3.5 3.5 V VDD = 10V, VO = 1V or 9V 7.0 7.0 7.0 V VDD = 15V, VO = 1.5V or 13.5V 11.0 11.0 11.0 V VIH = VDD, VIL = 0V VDD = 5V, VO = 0.4V 0.52 0.44 0.88 0.36 mA VDD = 10V, VO = 0.5V 1.3 1.1 2.2 0.9 mA VDD = 15V, VO = 1.5V 3.6 3.0 6.0 2.4 mA VIH = VDD, VIL = 0V VDD = 5V, VO = 4.6V −0.2 −0.16 −0.32 −0.12 mA VDD = 10V, VO = 9.5V −0.5 −0.4 −0.8 −0.3 mA VDD = 15V, VO = 13.5V −1.4 −1.2 −3.5 VDD = 15V, VIN = 0V −0.3 −0.3 −1.0 µA VDD = 15V, VIN = 15V 0.3 0.3 1.0 µA −1.0 mA Note 3: IOL and IOH are tested one output at a time. 3 www.fairchildsemi.com CD4028BC Absolute Maximum Ratings(Note 1) (Note 2) CD4028BC AC Electrical Characteristics (Note 4) TA = 25°C, CL = 50 pF, RL = 200k, Input tr = tf = 20 ns, unless otherwise specified Symbol tPHL or tPLH tTHL or tTLH CIN Parameter Propagation Delay Time Transition Time Input Capacitance Typ Max Units VCC = 5V Conditions 240 480 ns VCC = 10V 100 200 ns VCC = 15V 70 140 ns VCC = 5V 175 350 ns VCC = 10V 75 150 ns VCC = 15V 60 110 ns Any Input 5 7.5 pF Note 4: AC Parameters are guaranteed by DC correlated testing. Switching Time Waveforms www.fairchildsemi.com 4 Min CD4028BC Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow Body Package Number M16A 5 www.fairchildsemi.com CD4028BC BCD-to-Decimal Decoder Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300” Wide Package Number N16E LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 2. A critical component in any component of a life support 1. Life support devices or systems are devices or systems device or system whose failure to perform can be reawhich, (a) are intended for surgical implant into the sonably expected to cause the failure of the life support body, or (b) support or sustain life, and (c) whose failure device or system, or to affect its safety or effectiveness. to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the www.fairchildsemi.com user. Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications.