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70P247 Datasheet(PDF) 4 Page - Integrated Device Technology |
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70P247 Datasheet(HTML) 4 Page - Integrated Device Technology |
4 / 23 page 6.42 IDT70P257/247L Low Power 1.8V 8K/4K x 16 Dual-Port Static RAM Industrial Temperature Range 4 Truth Table II: Semaphore Read/Write Control(1) NOTE: 1. There are eight semaphore flags written to via I/O0 and read from all of the I/O's (I/O0-I/O15). These eight semaphores are addressed by A0-A2. Inputs Outputs Mode CE R/ W OE UB LB SEM I/O8-15 I/O0-7 HH L X X L DATAOUT DATAOUT Read Data in Semaphore Flag XH L H H L DATAOUT DATAOUT Read Data in Semaphore Flag H ↑ XX X L DATAIN DATAIN Write DIN0 into Semaphore Flag X ↑ XH H L DATAIN DATAIN Write DIN0 into Semaphore Flag L X XL XL ____ ____ Not Allowed LX X X L L ____ ____ Not Allowed 5684 tbl 03 Absolute Maximum Ratings(1) NOTES: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability. 2. VTERM must not exceed VDD + 0.3V for more than 25% of the cycle time or 10ns maximum, and is limited to < 20mA for the period over VTERM = VDD + 0.3V. 3. Ambient Temperature under DC Bias. No AC Conditions. Chip Deselected. Symbol Rating Industrial Unit VTERM Supply Voltage on VDD with Respect to GND -0.5 to +2.9 V VTERM(2) Terminal Voltage with Respect to GND -0.5 to VDD +0.3 V TBIAS(3) Temperature Under Bias -55 to +125 oC TSTG Storage Temperature -65 to +150 oC TJN Junction Temperature +150 oC IOUT DC Output Current 20 mA 5684 tbl 04 |
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