9348 12-Input Parity Checker/Generator General Description The 9348 is a 12-input parity checker/generator generating odd and even parity outputs. It can be used in high speed error detection applications. Connection Diagram Logic Symbol Dual-In-Line Package TL/F/9795 – 2 VCC e Pin 16 GND e Pin 8 TL/F/9795 – 1 Order Number 9348DMQB or 9348FMQB See NS Package Number J16A or W16A Pin Names I0–I11 PO PE C1995 National Semiconductor Corporation TL/F/9795 Description Parity Inputs Odd Parity Output Even Parity Output RRD-B30M115/Printed in U. S. A. 9348 12-Input Parity Checker/Generator June 1989 Absolute Maximum Ratings 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 Military b 65§ C to a 150§ C Storage Temperature Range Recommended Operating Conditions Symbol 9348 Parameter VCC Supply Voltage VIH High Level Input Voltage VIL Low Level Input Voltage IOH High Level Output Current IOL Low Level Output Current TA Free Air Operating Temperature Units Min Nom Max 4.5 5 5.5 V 2 V b 55 0.8 V b 0.8 mA 16 mA 125 §C Electrical Characteristics Over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Typ (Note 1) Min Max Units b 1.5 V VI Input Clamp Voltage VCC e Min, II e b12 mA VOH High Level Output Voltage VCC e Min, IOH e Max, VIL e Max VOL Low Level Output Voltage VCC e Min, IOL e Max, VIH e Min II Input Current Input Voltage VCC e Max, VI e 5.5V IIH High Level Input Current VCC e Max, VI e 2.4V 80 mA IIL Low Level Input Current VCC e Max, VI e 0.4V b 3.2 mA IOS Short Circuit Output Current VCC e Max (Note 2) b 70 mA ICC Supply Current VCC e Max 82 mA @ Max 2.4 V b 20 0.4 V 1 mA 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. Switching Characteristics VCC e a 5.0V, TA e a 25§ C (See Section 1 for waveforms and load configuration) Symbol Parameter Conditions CL e 15 pF RL e 400X Min Units Max tPLH tPHL Propagation Delay I4 to PO I2, I3, I7, I8 e GND; Other Inputs (except I4) HIGH 46 42 ns tPLH tPHL Propagation Delay I4 to PE I2, I3, I7, I8 e GND; Other Inputs (except I4) HIGH 51 48 ns tPLH Propagation Delay I3 to PO I7 e HIGH; Other Inputs (except I3) e GND 27 ns tPHL Propagation Delay I4 to PO All Inputs (except I4) e GND 25 ns 2 Functional Description The 9348 is a 12-input parity generator. It provides odd and even parity for up to 12 data bits. The Even Parity output (PE) will be HIGH if an even number of logic ones are present on the inputs. The Odd Parity output (PO) will be HIGH if an odd number of logic ones are present on the inputs. The logic equations for the outputs are shown below. PO e I0 PE e I0 Z Z I1 I1 Z Z I2 I2 Z Z I3 I3 Z Z I4 I4 Z Z I5 I5 Z Z I6 I6 Z Z I7 I7 Z Z I8 I8 Z Z I9 I9 Z Z I10 I10 Z Z I11 I11 Note: Less through delay is encountered from the I0, I1, I2 and I3 inputs than I4 thru I11 inputs. Therefore, if some signals are slower than others, the slower signals should be applied to these four inputs for maximum speed. Truth Table Inputs Outputs I0 – I11 PO PE All Twelve Any One Any Two Any Three Inputs LOW Inputs HIGH Inputs HIGH Inputs HIGH L H L H H L H L Any Four Any Five Any Six Any Seven Inputs HIGH Inputs HIGH Inputs HIGH Inputs HIGH L H L H H L H L Any Eight Any Nine Any Ten Any Eleven Any Twelve Inputs HIGH Inputs HIGH Inputs HIGH Inputs HIGH Inputs HIGH L H L H L H L H L H H e HIGH Voltage Level L e LOW Voltage Level Logic Diagram TL/F/9795 – 3 3 9348 12-Input Parity Checker/Generator Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 9348DMQB NS Package Number J16A 16-Lead Ceramic Flat Package (W) Order Number 9348FMQB 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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