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74F821 Datasheet(PDF) 9 Page - NXP Semiconductors |
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74F821 Datasheet(HTML) 9 Page - NXP Semiconductors |
9 / 18 page Philips Semiconductors Product specification 74F821/822/823/824/825/826 Bus interface registers 1996 Jan 05 9 LOGIC DIAGRAM FOR 74F826 VCC = Pin 24 GND = Pin 12 D0 D R Q Q0 D1 Q1 3 22 D2 Q2 4 21 D3 Q3 5 20 D4 Q4 6 19 D5 Q5 7 18 D6 Q6 8 17 D7 Q7 9 16 10 15 CP CE 14 11 MR 1 OE0 SF00505A 13 CP 2 23 OE1 OE2 D R Q CP D R Q CP D R Q CP D R Q CP D R Q CP D R Q CP D R Q CP FUNCTION TABLE FOR 74F825 AND 74F826 INPUTS OUTPUTS INPUTS 74F825 74F826 OPERATING MODE OEn MR CE* CP Dn Q Q L L X X X L L Clear L H L ↑ h H L Load and read data L H L ↑ l L H Load and read data L H H X X NC NC Hold H X X X X Z Z High impedance H = High-voltage level h = High state must be present one setup time before the low-to-high clock transition L = Low-voltage level l = Low state must be present one setup time before the low-to-high clock transition NC= No change X = Don’t care Z = High impedance “off” state * = Since CE input is sensitive to very short (<3ns) high-to-low-to-high going spikes while CP is high, users should avoid the use of decoders or other potentially glitch prone device on the CE input. ↑ = Low-to-high clock transition ABSOLUTE MAXIMUM RATINGS (Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free-air temperature range.) SYMBOL PARAMETER RATING UNIT VCC Supply voltage –0.5 to +7.0 V VIN Input voltage –0.5 to +7.0 V IIN Input current –30 to +5 mA VOUT Voltage applied to output in high output state –0.5 to VCC V IOUT Current applied to output in low output state 128 mA T Operating free air temperature range Commercial range 0 to +70 °C Tamb Operating free-air temperature range Industrial range –40 to +85 °C Tstg Storage temperature range –65 to +150 °C |
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