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74F189 Scheda tecnica(PDF) 3 Page - NXP Semiconductors |
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74F189 Scheda tecnica(HTML) 3 Page - NXP Semiconductors |
3 / 10 page Philips Semiconductors Product specification 74F189A 64-bit TTL bipolar RAM, inverting (3-State) 1990 Feb 23 3 IEC/IEEE SYMBOL 1 15 14 13 12 11 RAM 16X4 10 9 6 7 4 5 2 3 A,2D A G1 1 EN [READ] 1 C2 [WRITE] 0 1 A 0 15 SF00301 FUNCTION TABLE INPUTS OUTPUT OPERATING CE WE Dn Qn MODE L H X Complement of stored data Read L L L High impedance Write “0” H L H High impedance Write “1” H X X High impedance Disable input NOTES: H = High voltage level L = Low voltage level X = Don’t care LOGIC DIAGRAM VCC = Pin 16 GND = Pin 8 Decoder Drivers A0 A1 A2 A3 Address Decoder 16–word x 4–bit memory cell array Data buffers Output buffers Q0Q1Q2Q3 D0 D1 D2 D3 WE CE 1 15 14 13 3 2 4 6 10 12 57 9 11 SF00302 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 48 mA Tamb Operating free air temperature range 0 to +70 °C Tstg Storage temperature range –65 to +150 °C |
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