White Electronic Designs WSF256K8-72CM, WSF256K8-72CIA, WSF256K8-72CI, WSF256K8-72CCA, WSF256K8-72CC Datasheet

WSF256K8-XCX

256Kx8 SRAM/ FLASH MODULE

FIG. 1

PIN CONFIGURATION

TOP VIEW

A18			1	32			VCC
A16			2	31
							WE
A15			3	30			A17
A12			4	29			A14
A7			5	28			A13
A6			6	27			A8
A5			7	26			A9
A4			8	25			A11
A3			9	24
							OE
A2			10	23			A10
A1			11	22
							CS
A0			12	21			I/O7
I/O0			13	20			I/O6
I/O1			14	19			I/O5
I/O2			15	18			I/O4
VSS			16	17			I/O3

PIN DESCRIPTION

A0-18						Address Inputs
I/O0-7						Data Input/Output
						Chip Select
	CS
						Output Enable
		OE
						Write Enable
	WE
VCC						+5.0V Power
VSS						Ground

BLOCK DIAGRAM

A0-16

I/O0-7

WE

OE

ADVANCED*

FEATURES

■Access Times of 35ns (SRAM) and 70ns (FLASH)

■JEDEC Standard, Hermetic Ceramic Package, 32 pin DIP (Package 300)

■256Kx8 SRAM

■256Kx8 5V FLASH

■Memory Map

Flash Memory: 0H-3FFFFH

SRAM: 40000H-7FFFFH

■Low Power CMOS

■Commercial, Industrial and Military Temperature Ranges

■TTL Compatible Inputs and Outputs

■Built-in Decoupling Caps and Multiple Ground Pins for Low Noise Operation

FLASH MEMORY FEATURES

■10,000 Erase/Program Cycles

■Sector Architecture

•8 equal size sectors of 16KBytes each

•Any combination of sectors can be concurrently erased. Also supports full chip erase

■Data Retention, 10 Years at 125°C

■5 Volt Programming; 5V ± 10% Supply

■Embedded Erase and Program Algorithms

■Hardware and Software Write Protection

■Page Program Operation and Internal Program Control Time

*This data sheet describes a product that may or may not be under development and is subject to change or cancellation without notice.

128K x 8		128K x 8		128K x 8		128K x 8
Flash		Flash		SRAM		SRAM

A17

Decoder

A18

CS

11

MODULES MIXED

January 1996

1

White Microelectronics • Phoenix, AZ • [phone]