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IDT709359 Datasheet(PDF) 3 Page - Integrated Device Technology |
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IDT709359 Datasheet(HTML) 3 Page - Integrated Device Technology |
3 / 15 page 6.42 IDT709359/49L High-Speed 8/4K x 18 Synchronous Pipelined Dual-Port Static RAM Industrial and Commercial Temperature Ranges 3 NOTES: 1. "H" = VIH, "L" = VIL, "X" = Don't Care. 2. ADS, CNTEN, CNTRST = X. 3. OE is an asynchronous input signa 4. LB and UB are single buffered regardless of state of FT/PIPE. 5. CEo and CE1 are single buffered when FT/PIPE = VIL. CEo and CE1 are double buffered when FT/PIPE = VIH, i.e. the signals take two cycles to deselect. Truth Table I—Read/Write and Enable Control(1,2,3) OE CLK CE0(5) CE1(5) UB(4) LB(4) R/W Upper Byte I/O9-17 Lower Byte I/O0-8 Mode X ↑ H X X X X High-Z High-Z Deselected—Power Down X ↑ X L X X X High-Z High-Z Deselected—Power Down X ↑ L H H H X High-Z High-Z Both Bytes Deselected X ↑ LH LH L DATAIN High-Z Write to Upper Byte Only X ↑ LH H L L High-Z DATAIN Write to Lower Byte Only X ↑ LH L L L DATAIN DATAIN Write to Both Bytes L ↑ LH LH H DATAOUT High-Z Read Upper Byte Only L ↑ LH H L H High-Z DATAOUT Read Lower Byte Only L ↑ LH L L H DATAOUT DATAOUT Read Both Bytes H X L H X X X High-Z High-Z Outputs Disabled 5633 tbl 02 Pin Names Left Port Right Port Names CE0L , CE1L CE0R , CE1R Chip Enables(3) R/WL R/WR Read/Write Enable OEL OER Output Enable A0L - A12L(1) A0R - A12R(1) Address I/O0L - I/O17L I/O0R - I/O17R Data Input/Output CLKL CLKR Clock UBL UBR Upper Byte Select(2) LBL LBR Lower Byte Select(2) ADSL ADSR Address Strobe CNTENL CNTENR Counter Enable CNTRSTL CNTRSTR Counter Reset FT /PIPEL FT /PIPER Flow-Through/Pipeline VCC Power (5V) GND Ground (0V) 5633 tbl 01 NOTES: 1. A12 is a NC for IDT709349. 2. LB and UB are single buffered regardless of state of FT/PIPE. 3. CEo and CE1 are single buffered when FT/PIPE = VIL, CE o and CE1 are double buffered when FT/PIPE = VIH, i.e. the signals take two cycles to deselect. |
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