Memory Size is 4Mb (256K x 16) - Memory Distributor - AS7C4098A-15TCN M27C4002-15F1 M27C4002-45XF1 - CHIPSIC

Part Number	Manufacturer / Brand	Brife Description	Part Status	Memory Type	Memory Format	Technology	Memory Size	Clock Frequency	Write Cycle Time - Word, Page	Access Time	Memory Interface	Voltage - Supply	Operating Temperature	Mounting Type	Package / Case	Supplier Device Package
AS7C4098A-15TCN	Alliance Memory, Inc.	IC SRAM 4M PARALLEL 44TSOP II	Active	Volatile	SRAM	SRAM - Asynchronous	4Mb (256K x 16)	-	15ns	15ns	Parallel	4.5 V ~ 5.5 V	0°C ~ 70°C (TA)	Surface Mount	44-TSOP (0.400", 10.16mm Width)	44-TSOP II
M27C4002-15F1	STMicroelectronics	IC EPROM 4M PARALLEL 40CDIP	Obsolete	Non-Volatile	EPROM	EPROM - UV	4Mb (256K x 16)	-	-	150ns	Parallel	4.5 V ~ 5.5 V	0°C ~ 70°C (TA)	Through Hole	40-CDIP (0.600", 15.24mm) Window	40-CDIP Frit Seal with Window
M27C4002-45XF1	STMicroelectronics	IC EPROM 4M PARALLEL 40CDIP	Obsolete	Non-Volatile	EPROM	EPROM - UV	4Mb (256K x 16)	-	-	45ns	Parallel	4.75 V ~ 5.25 V	0°C ~ 70°C (TA)	Through Hole	40-CDIP (0.600", 15.24mm) Window	40-CDIP Frit Seal with Window
M27C4002-70C1	STMicroelectronics	IC EPROM 4M PARALLEL 44PLCC	Obsolete	Non-Volatile	EPROM	EPROM - OTP	4Mb (256K x 16)	-	-	70ns	Parallel	4.5 V ~ 5.5 V	0°C ~ 70°C (TA)	Surface Mount	44-LCC (J-Lead)	44-PLCC (16.51x16.51)
M27C4002-80XF1	STMicroelectronics	IC EPROM 4M PARALLEL 40CDIP	Obsolete	Non-Volatile	EPROM	EPROM - UV	4Mb (256K x 16)	-	-	80ns	Parallel	4.75 V ~ 5.25 V	0°C ~ 70°C (TA)	Through Hole	40-CDIP (0.600", 15.24mm) Window	40-CDIP Frit Seal with Window