Details

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BUY CY7C185-20VC https://www.utsource.net/itm/p/12609565.html

Parameter	Value
Device Type	32K x 8 CMOS Static RAM
Package	28-Pin PDIP, 28-Pin PLCC, 28-Pin TSSOP
Operating Voltage (Vcc)	4.5V to 5.5V
Access Time (tAA)	20 ns (typical)
Data Retention (Vcc = 0V)	20 years at 25掳C
Standby Current (Icc)	10 渭A (max) at Vcc = 5V, Ta = 25掳C
Active Current (Icc)	60 mA (max) at Vcc = 5V, f = 10 MHz, Ta = 25掳C
Temperature Range (Ta)	-40掳C to +85掳C
Write Cycle Time (tWC)	20 ns (min)
Read Cycle Time (tRC)	20 ns (min)
Address Setup Time (tAS)	10 ns (min)
Address Hold Time (tAH)	5 ns (min)
Data Setup Time (tDS)	10 ns (min)
Data Hold Time (tDH)	5 ns (min)
Output Enable Delay (tOE)	8 ns (max)
Write Enable Delay (tWE)	8 ns (max)
Power Down Mode	Low Power Standby Mode
Pin Configuration	A0-A14: Address Inputs, DQ0-DQ7: Data I/O, WE: Write Enable, OE: Output Enable, CE: Chip Enable

Instructions for Use

1. Power Supply:

   • Ensure the supply voltage (Vcc) is within the specified range of 4.5V to 5.5V.
   • Connect the ground (GND) pin to a stable ground reference.

2. Addressing:

   • Apply the desired address to the address lines (A0-A14) before the address setup time (tAS).
   • Maintain the address on the address lines for at least the address hold time (tAH).

3. Data Input:

   • Apply the data to be written to the data lines (DQ0-DQ7) before the data setup time (tDS).
   • Maintain the data on the data lines for at least the data hold time (tDH).

4. Write Operation:

   • Set the Write Enable (WE) and Chip Enable (CE) pins low to initiate a write cycle.
   • Ensure the write cycle time (tWC) is at least 20 ns.

5. Read Operation:

   • Set the Output Enable (OE) and Chip Enable (CE) pins low to initiate a read cycle.
   • Ensure the read cycle time (tRC) is at least 20 ns.
   • The data will be available on the data lines (DQ0-DQ7) after the output enable delay (tOE).

6. Power Down:

   • To enter low power standby mode, set the Chip Enable (CE) pin high.
   • The device will consume minimal current in this state.

7. Temperature Considerations:

   • Ensure the operating temperature (Ta) remains within the range of -40掳C to +85掳C to avoid damage or performance degradation.

8. Storage and Handling:

   • Store the device in a dry, static-free environment.
   • Handle with care to avoid damage to the pins and package.

(For reference only)