Cypress CY7C1019BN manual Features, Functional Description, Top View

CY7C1019BN

128K x 8 Static RAM

Features

•High speed

— tAA = 12, 15 ns

•CMOS for optimum speed/power

•Center power/ground pinout

•Automatic power-down when deselected

•Easy memory expansion with CE and OE options

•Functionally equivalent to CY7C1019

Functional Description

The CY7C1019BN is a high-performance CMOS static RAM organized as 131,072 words by 8 bits. Easy memory expansion is provided by an active LOW Chip Enable (CE), an active LOW Output Enable (OE), and three-state drivers. This device has an automatic power-down feature that significantly reduces power consumption when deselected.

Writing to the device is accomplished by taking Chip Enable (CE) and Write Enable (WE) inputs LOW. Data on the eight I/O pins (I/O0 through I/O7) is then written into the location specified on the address pins (A0 through A16).

Reading from the device is accomplished by taking Chip Enable (CE) and Output Enable (OE) LOW while forcing Write Enable (WE) HIGH. Under these conditions, the contents of the memory location specified by the address pins will appear on the I/O pins.

The eight input/output pins (I/O0 through I/O7) are placed in a high-impedance state when the device is deselected (CE HIGH), the outputs are disabled (OE HIGH), or during a write operation (CE LOW, and WE LOW).

The CY7C1019BN is available in standard 32-pin TSOP Type II and 400-mil-wide SOJ packages.

Logic Block Diagram								Pin Configurations
									SOJ / TSOPII
									Top View
								A0	1	32	A16
								A1	2	31	A15
								A2	3	30	A
								A3			14
							I/O0		4	29	A
								CE	5	28	13
		INPUT BUFFER									OE
							I/O1	I/O0	6	27	I/O
A0										26	7
								I/O1	7		I/O6
A1	DECODER						I/O2			25
A2								VCC	8		V
A3					AMPS			VSS		24	SS
							I/O3		9		VCC
A4		512 x 256 x 8						I/O2	10	23	I/O5
A5
	ROW		ARRAY		SENSE			I/O3		22	I/O4
A6							I/O4		11
A7								WE	12	21	A12
A8							I/O5	A4	13	20	A11
								A5	14	19	A10
				POWER			I/O6	A6	15	18	A9
			COLUMN					A7	16	17	A8
CE					DOWN
			DECODER				I/O7
WE
OE	9	10	11 12 13 14 15 16
	A A A A A A A A
Cypress Semiconductor Corporation					•	198 Champion Court	•	San Jose, CA 95134-1709		•	408-943-2600
Document #: 001-06425 Rev. **									Revised February 1, 2006

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