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9348 12-Input Parity Checker/Generator Literature Number: SNOS384A
9348 12-Input Parity Checker/Generator June 1989 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 Dual-In-Line Package TL/F/9795–1 Order Number 9348DMQB or 9348FMQB See NS Package Number J16A or W16A Logic Symbol TL/F/9795–2 VCC e Pin 16 GND e Pin 8 Pin Names Description I0–I11 Parity Inputs PO Odd Parity Output PE Even Parity Output C1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
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 Military b55§Ct o a125§C Storage Temperature Range b65§Ct o a150§C Note: The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaran- teed. 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. Recommended Operating Conditions Symbol Parameter 9348 Units Min Nom Max VCC Supply Voltage 4.5 5 5.5 V VIH High Level Input Voltage 2 V VIL Low Level Input Voltage 0.8 V IOH High Level Output Current b0.8 mA IOL Low Level Output Current 16 mA TA Free Air Operating Temperature b55 125 §C
Electrical Characteristics
Over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units(Note 1) VI Input Clamp Voltage V CC e Min, I I eb 12 mA b1.5 V VOH High Level Output Voltage V CC e Min, I OH e Max, V IL e Max 2.4 V VOL Low Level Output Voltage V CC e Min, I OL e Max, V IH e Min 0.4 V II Input Current @ Max V CC e Max, V I e 5.5V 1m AInput Voltage IIH High Level Input Current V CC e Max, V I e 2.4V 80 mA IIL Low Level Input Current V CC e Max, V I e 0.4V b3.2 mA IOS Short Circuit Output Current V CC e Max (Note 2) b20 b70 mA ICC Supply Current V CC e Max 82 mA Note 1: All typicals are at V CC e 5V, T A e 25§C. Note 2: Not more than one output should be shorted at a time. Switching Characteristics VCC ea 5.0V, T A ea 25§C (See Section 1 for waveforms and load configuration) CL e 15 pF Symbol Parameter Conditions R L e 400X Units Min Max tPLH Propagation Delay I2, I3, I7, I8 e GND; Other 46 nstPHL I4 to PO Inputs (except I4) HIGH 42 tPLH Propagation Delay I2, I3, I7, I8 e GND; Other 51 nstPHL I4 to PE Inputs (except I4) HIGH 48 tPLH Propagation Delay I7 e HIGH; Other Inputs 27 nsI3 to PO (except I3) e GND tPHL Propagation Delay All Inputs (except I4) e GND 25 nsI4 to PO
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 PE e e I0 Z I1 Z I2 Z I3 Z I4 Z I5 Z I6 Z I7 Z I8 Z I9 Z I10 Z I11 I0 Z I1 Z I2 Z I3 Z I4 Z I5 Z I6 Z I7 Z I8 Z I9 Z I10 Z 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 Inputs LOW L H Any One Inputs HIGH H L Any Two Inputs HIGH L H Any Three Inputs HIGH H L Any Four Inputs HIGH L H Any Five Inputs HIGH H L Any Six Inputs HIGH L H Any Seven Inputs HIGH H L Any Eight Inputs HIGH L H Any Nine Inputs HIGH H L Any Ten Inputs HIGH L H Any Eleven Inputs HIGH H L Any Twelve Inputs HIGH L H H e HIGH Voltage Level L e LOW Voltage Level Logic Diagram TL/F/9795–3
9348 12-Input Parity Checker/Generator Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number 9348DMQB 16-Lead Ceramic Flat Package (W) Order Number 9348FMQB 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. Life support devices or systems are devices or 2. A critical component is any component of a life systems which, (a) are intended for surgical implant support device or system whose failure to perform can into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life failure to perform, when properly used in accordance support device or system, or to affect its safety or with instructions for use provided in the labeling, can effectiveness. be reasonably expected to result in a significant injury to the user. National Semiconductor National Semiconductor National Semiconductor National Semiconductor Corporation Europe Hong Kong Ltd. Japan Ltd.
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