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Infineon Technologies CY7C1543KV18-400BZI — Memory (DRAM / SRAM / Flash / EEPROM)
Infineon Technologies

Infineon CY7C1543KV18-400BZI 72Mbit QDR II+ SRAM, 400 MHz

MPNCY7C1543KV18-400BZI
End of Life

Infineon (Cypress) CY7C1543KV18-400BZI, 72Mbit synchronous QDR II+ SRAM, 400 MHz clock, 1.7–1.9V supply, 4M x 18 organization, 165-FBGA (13x15 mm) surface-mount, tray, -40°C to 85°C.

$347.3060Ref. price · indicative, final on quote
CY7C1543KV18-400BZI datasheet
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
  • PayPal buyer protectionPay by T/T, PayPal or Payoneer — card payments covered end to end.

Specifications

CY7C1543KV18-400BZI Technical Specifications
ParameterValue
Memory typeVolatile
Mounting typeSurface Mount
Voltage1.7V ~ 1.9V
Frequency400 MHz
Memory interfaceParallel
Operating temperature-40°C ~ 85°C (TA)
PackageTray
TechnologySRAM - Synchronous, QDR II+
Memory size72Mbit
Memory formatSRAM
Case165-LBGA
Memory organization4M x 18

Product details

400 MHz QDR II+ SRAM for high-throughput buffers

The Infineon CY7C1543KV18-400BZI is a 72 Mbit synchronous SRAM built on the QDR II+ architecture, clocked at 400 MHz. Organized as 4M x 18, it uses a parallel interface and operates from a 1.7 V to 1.9 V supply. This part is designed for high-bandwidth data buffering in networking equipment, telecom line cards, and test instrumentation where low-latency random access is critical. The industrial temperature range (-40°C to 85°C) suits it for controlled environments like central offices and lab racks, though the 165-FBGA package (13x15 mm) demands careful PCB layout and is not hand-solderable.

Lifecycle status and sourcing reality

The CY7C1543KV18-400BZI carries an EOL hot lifecycle stage, meaning Infineon has announced end-of-life for this device. For a BOM line that needs this exact density and speed grade, the window for last-time buys is closing. We source this part through independent distribution and quote it to order against an RFQ — availability and current pricing are confirmed at quote time. There is no official successor listed, so any replacement would require a board spin or a functionally equivalent SRAM from a different density or speed tier.

Frequently asked questions

How do I get current pricing and availability for the CY7C1543KV18-400BZI?

Submit an RFQ through this listing. We source this part via independent distribution and confirm availability and current pricing at quote time — no stock or price figures are published here because the supply position changes with each inquiry.

What is the closest functional alternative to the CY7C1543KV18-400BZI?

The CY7C1513KV18-250BZI is a 72 Mbit QDR II+ SRAM with the same 4M x 18 organization, but clocked at 250 MHz instead of 400 MHz. It is a lower-speed sibling that could serve as a second source if your design can tolerate the reduced bandwidth. The CY7C1545KV18-450BZXI offers a higher 450 MHz clock but uses a 2M x 36 organization, which changes the data bus width.

Will the CY7C1543KV18-400BZI drop into a board designed for the CY7C1513KV18-250BZI?

Both parts share the same 72 Mbit density, 4M x 18 organization, and 165-FBGA package footprint, so the mechanical fit is identical. However, the 400 MHz clock requires tighter PCB signal integrity — trace length matching and decoupling that worked at 250 MHz may not be adequate at 400 MHz. Verify the board's layout before assuming a direct swap.