DESCRIPTION
A new pattern can then be written to the device by following the programming procedure. For applications where the content is programmed only one time and erasure is not required, the M87C257 is offered in Plastic Leaded Chip Carrier, package. VCC 15 A0-A14 8 Q0-Q7 E G M87C257 Table 1. Signal Names A0 - A14 Q0 - Q7 E G ASVPP VCC VSS Address Inputs Data Outputs Chip Enable Output Enable Address Strobe / Program Supply Supply Voltage Ground ASVPP VSS AI00928B June 1996 1/13 M87C257 Figure 2A. DIP Pin Connections Figure 2B. LCC Pin Connections Q1 Q2 AI00929 VSS DU Q3 Q4 Q5 AI00930 ASVPP A12 A7 A6 A5 A4 A3 A2 A1 A0 Q0 Q1 Q2 VSS 28 1 27 2 26 3 25 4 24 5 23 6 22 7 M87C257 21 8 20 9 19 10 18 11 17 12 13 16 14 15 VCC A14 A13 A8 A9 A11 G A10 E Q7 Q6 Q5 Q4 Q3 A7 A12 ASVPP DU VCC A14 A13 1 32 A6 A5 A4 A3 A2 A1 A0 NC Q0 A8 A9 A11 NC G A10 E Q7 Q6 9 M87C257 25 17 Warning: NC = Not Connected, DU = Dont’t Use. Value –40 to 125 –50 to 125 –65 to 150 –2 to 7 –2 to 7 –2 to 13.5 –2 to 14 Table 2.
STMicroelectronics
