24 Feb
1999
24 Feb
'99
4:16 p.m.
<Here's some information. It's a 256*1 bit PMOS static RAM, access time
<850ns or better. It runs off +5V and -9V (as usual for PMOS). The pinout
<is :
That was the fast part. the lowcost part was 1.5us. it was very slow
and in 1972 when I first encounterd it, they were $15 a copy too!
<
<1 A5
<2 A7
<3 A6
<4 Vd (-9V)
<5 Vcc (+5V)
<6 A4
<7 A0
<8 Vdd (-9V)
<9 A2
<10 A1
<11 A3
<12 Data In
<13 Data Out
<14 Data Out/
<15 R/W
<16 CS/
Correct. according to my data sheet.
Allison