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IDT7140LA55FG bảng dữ liệu(PDF) 12 Page - Integrated Device Technology |
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IDT7140LA55FG bảng dữ liệu(HTML) 12 Page - Integrated Device Technology |
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12 / 19 page  IDT7130SA/LA and IDT7140SA/LA High-Speed 1K x 8 Dual-Port Static SRAM Military, Industrial and Commercial Temperature Ranges 12 AC Electrical Characteristics Over the Operating Temperature and Supply Voltage Range(7) NOTES: 1. PLCC, TQFP and STQFP packages only. 2. Port-to-port delay through RAM cells from the writing port to the reading port, refer to “Timing Waveform of Write with Port -to-Port Read and BUSY." 3. To ensure that the earlier of the two ports wins. 4. tBDD is a calculated parameter and is the greater of 0, tWDD – tWP (actual) or tDDD – tDW (actual). 5. To ensure that a write cycle is inhibited on port 'B' during contention on port 'A'. 6. To ensure that a write cycle is completed on port 'B' after contention on port 'A'. 7. 'X' in part numbers indicates power rating (S or L). 7130X20 (1) 7140X20 (1) Com'l Only 7130X25 7140X25 Com'l, Ind & Military 7130X35 7140X35 Com'l & Military Symbol Parameter Min.Max.Min.Max.Min. Max. Unit BUSY TIMING (For MASTER IDT 7130) tBAA BUSY Access Time from Address ____ 20 ____ 20 ____ 20 ns tBDA BUSY Disable Time from Address ____ 20 ____ 20 ____ 20 ns tBAC BUSY Access Time from Chip Enable ____ 20 ____ 20 ____ 20 ns tBDC BUSY Disable Time from Chip Enable ____ 20 ____ 20 ____ 20 ns tWH Write Hold After BUSY(6) 12 ____ 15 ____ 20 ____ ns tWDD Write Pulse to Data Delay(2) ____ 40 ____ 50 ____ 60 ns tDDD Write Data Valid to Read Data Delay(2) ____ 30 ____ 35 ____ 35 ns tAPS Arbitration Priority Set-up Time (3) 5 ____ 5 ____ 5 ____ ns tBDD BUSY Disable to Valid Data(4) ____ 25 ____ 35 ____ 35 ns BUSY INPUT TIMING (For SLAVE IDT 7140) tWB Write to BUSY Input(5) 0 ____ 0 ____ 0 ____ ns tWH Write Hold After BUSY(6) 12 ____ 15 ____ 20 ____ ns tWDD Write Pulse to Data Delay (2) ____ 40 ____ 50 ____ 60 ns tDDD Write Data Valid to Read Data Delay(2) ____ 30 ____ 35 ____ 35 ns 2689 tbl 11a 7130X55 7140X55 Com'l, Ind & Military 7130X100 7140X100 Com'l, Ind & Military Symbol Parameter Min. Max. Min. Max. Unit BUSY TIMING (For MASTER IDT 7130) tBAA BUSY Access Time from Address] ____ 30 ____ 50 ns tBDA BUSY Disable Time from Address ____ 30 ____ 50 ns tBAC BUSY Access Time from Chip Enable ____ 30 ____ 50 ns tBDC BUSY Disable Time from Chip Enable ____ 30 ____ 50 ns tWH Write Hold After BUSY(6) 20 ____ 20 ____ ns tWDD Write Pulse to Data Delay(2) ____ 80 ____ 120 ns tDDD Write Data Valid to Read Data Delay (2) ____ 55 ____ 100 ns tAPS Arbitration Priority Set-up Time (3) 5 ____ 5 ____ ns tBDD BUSY Disable to Valid Data(4) ____ 55 ____ 65 ns BUSY INPUT TIMING (For SLAVE IDT 7140) tWB Write to BUSY Input(5) 0 ____ 0 ____ ns tWH Write Hold After BUSY(6) 20 ____ 20 ____ ns tWDD Write Pulse to Data Delay(2) ____ 80 ____ 120 ns tDDD Write Data Valid to Read Data Delay (2) ____ 55 ____ 100 ns 2689 tbl 11b |
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