54F189 Datasheet - National Semiconductor

54F189 64-Bit Random Access Memory

The ’F189 is a high-speed 64-bit RAM organized as a 16word by 4-bit array Address inputs are buffered to minimize loading and are fully decoded on-chip The outputs are TRISTATE and are in the high impedance state whenever the Chip Select (CS) input is HIGH The outputs are active only in the Read mod.

54F189 Features

* Y TRI-STATE outputs for data bus applications Y Buffered inputs minimize loading Y Address decoding on-chip Y Diode clamped inputs minimize ringing Y Available in SOIC (300 mil only) Commercial 74F189PC 74F189SC (Note 1) 74F189SJ (Note 1) Military 54F189DL (Note 2) 54F189FL (Note 2) 54F189LL (Note

54F189-NationalSemiconductor.pdf