9321/DM9321 Dual 1-of-4 Decoder General Description Features The 9321 consists of two independent multipurpose decoders, each designed to accept two inputs and provide four mutually exclusive outputs. In addition an active LOW enable input, which gives demultiplexing capability, is provided for each decoder. Y Connection Diagram Logic Symbol Y Y Y Multifunction capability Mutually exclusive outputs Demultiplexing capability Active low enable for each decoder Dual-In-Line Package TL/F/10209 – 2 VCC e Pin 16 GND e Pin 8 TL/F/10209 – 1 Order Number 9321DMQB, 9321FMQB or DM9321N See NS Package Number J16A, N16E or W16A Pin Names Ea, Eb A0a, A1a, A0b, A1b O0a– O3a O0b– O3b ( C1995 National Semiconductor Corporation TL/F/10209 Description Enable Inputs (Active LOW) Address Inputs Decoder Outputs (Active LOW) RRD-B30M105/Printed in U. S. A. 9321/DM9321 Dual 1-of-4 Decoder June 1989 Absolute Maximum Ratings (Note) Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings. The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation. If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage 7V Input Voltage 5.5V Operating Free Air Temperature Range b 55§ C to a 125§ C MIL COMM 0§ C to a 70§ C Storage Temperature Range b 65§ C to a 150§ C Recommended Operating Conditions Symbol Military Parameter Commercial Units Min Nom Max Min Nom Max 5 5.5 4.75 5 5.25 VCC Supply Voltage 4.5 VIH High Level Input Voltage 2 VIL Low Level Input Voltage IOH 2 V V 0.8 0.8 V High Level Output Current b 0.8 b 0.8 mA IOL Low Level Output Current 16 16 mA TA Free Air Operating Temperature 70 §C b 55 125 0 Electrical Characteristics over recommended operating free air temperature (unless otherwise noted) Symbol Parameter Conditions VI Input Clamp Voltage VCC e Min, II e b10 mA VOH High Level Output Voltage VCC e Min, IOH e Max, VIL e Max, VIH e Min VOL Low Level Output Voltage VCC e Min, IOL e Max, VIH e Min, VIL e Max II Input Current @ Max Input Voltage IIH Min Typ (Note 1) Max Units b 1.5 V 2.4 V 0.4 V VCC e Max, VI e 5.5V 1 mA High Level Input Current VCC e Max, VI e 2.4V 40 mA IIL Low Level Input Current VCC e Max, VI e 0.4V b 1.6 mA IOS Short Circuit Output Current VCC e Max (Note 2) Supply Current VCC e Max (Note 3) ICC MIL b 20 b 70 COM b 1.3 b 3.7 50 Note 1: All typicals are at VCC e 5V, TA e 25§ C. Note 2: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 3: ICC is measured with all outputs open and all inputs grounded. 2 mA mA Switching Characteristics VCC e a 5.0V, TA e a 25§ C (See Section 1 for test waveforms and output load) Symbol CL e 15 pF Parameter Min Units Max tPLH tPHL Propagation Delay, An to On 20 21 ns tPLH tPHL Propagation Delay, E to On 14 18 ns Functional Description Truth Table (Each Decoder) The 9321 consists of two separate decoders each designed to accept two binary weighted inputs and provide four mutually exclusive active LOW outputs as shown in the logic symbol. Each decoder can be used as a 4-output demultiplexer by using the enable as a data input. Inputs Outputs E A0 A1 O0 O1 O2 O3 L L L L H L H L H X L L H H X L H H H H H L H H H H H L H H H H H L H H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Logic Diagram TL/F/10209 – 3 3 4 Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 9321DMQB NS Package Number J16A 16 Lead Molded Dual-In-Line Package (N) Order Number DM9321N NS Package Number N16E 5 9321/DM9321 Dual 1-of-4 Decoder Physical Dimensions inches (millimeters) (Continued) 16-Lead Ceramic Flat Package (W) Order Number 9321FMQB NS Package Number W16A LIFE SUPPORT POLICY NATIONAL’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 NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. 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