Package and temperature grade
Housed in a 44-TSOP II (0.400", 10.16 mm width) surface-mount package, this part is intended for reflow assembly on standard FR4 boards.
Obsolete — sourcing reality
Infineon has marked the CY7C1021B-15ZXI as Obsolete.
Infineon CY7C1021B-15ZXI 1Mbit Async SRAM, 15 ns, 44-TSOP II
MPNCY7C1021B-15ZXI
Obsolete
Infineon CY7C1021B-15ZXI, 1Mbit asynchronous SRAM, 15 ns access time, 64K x 16 organization, Parallel interface, 4.5V–5.5V supply, -40°C to 85°C, 44-TSOP II (surface mount).
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Memory type | Volatile |
| Mounting | Surface Mount |
| Supply voltage | 4.5V ~ 5.5V |
| Memory interface | Parallel |
| Operating temperature | -40°C ~ 85°C (TA) |
| Package | Tray |
| Technology | SRAM - Asynchronous |
| Access time | 15 ns |
| Memory size | 1Mbit |
| Memory format | SRAM |
| Case | 44-TSOP (0.400\", 10.16mm Width) |
| Memory organization | 64K x 16 |
| Write cycle time - word, page | 15ns |
Product details
Frequently asked questions
Is CY7C1021B-15ZXI obsolete?
Yes, Infineon lists the CY7C1021B-15ZXI as Obsolete. No official replacement has been published, so procurement must rely on the surplus and broker channel for this exact order code.
What is the difference between CY7C1021B-15ZXI and CY7C1021C-15ZXI?
The CY7C1021C-15ZXI is the later 'C' revision of the same 1 Mbit asynchronous SRAM family. The 'C' revision typically incorporates minor process or timing improvements; check the respective datasheets for any parametric deltas before substituting in a production BOM.