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9314FMQB Datasheet(PDF) 3 Page - National Semiconductor (TI) |
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9314FMQB Datasheet(HTML) 3 Page - National Semiconductor (TI) |
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3 / 6 page  Switching Characteristics VCC ea50V TA ea25 C (See Section 1 for waveforms and load configurations) Symbol Parameter CL e 15 pF Units Min Max tPLH Propagation Delay 24 ns tPHL E to Qn 24 tPLH Propagation Delay 12 ns tPHL Dn to Qn 24 tPLH Propagation Delay 18 ns MR to Qn tPHL Propagation Delay 24 ns Sn to Qn Functional Description The ’9314 consists of four latches with a common active LOW Enable input and active LOW Master Reset input When the Enable goes HIGH data present in the latches is stored and the state of the latch is no longer affected by the Sn and Dn inputs The Master Reset when activated over- rides all other input conditions forcing all latch outputs LOW Each of the four latches can be operated in one of two modes D-TYPE LATCHFor D-type operation the S input of a latch is held LOW While the common Enable is active the latch output follows the D input Information present at the latch output is stored in the latch when the Enable goes HIGH SETRESET LATCHDuring setreset operation when the common Enable is LOW a latch is reset by a LOW on the D input and can be set by a LOW on the S input if the D input is HIGH If both S and D inputs are LOW the D input will dominate and the latch will be reset When the Enable goes HIGH the latch remains in the last state prior to disable- ment The two modes of latch operation are shown in the Truth Table Truth Table MR E DS Qn Operation H L L L L D Mode HL H L H HH X X Qnb1 H L L L L RS Mode HL H L H HL L H L H L HHQnb1 HH X X Qnb1 L X X X L Reset H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial Qnb1 e Previous Output State Qn e Present Output State 3 |
Similar Part No. - 9314FMQB |
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Similar Description - 9314FMQB |
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