ISSI
256Mb SDR SDRAM x16 (16M x 16), 143 MHz, 3.3 V, 54-pin TSOP II, industrial grade – ISSI G revision now not recommended for new designs
The ISSI IS42S16160G-7TLI is a 256Mb synchronous DRAM organized as 4 banks x 4M x 16, rated for 143 MHz operation (speed grade -7) with a 3.3 V supply, in a lead-free 54-pin TSOP II package and specified for the industrial -40 °C to +85 °C range. It is a standard choice for MCU, FPGA and SoC designs with SDR memory controllers in industrial automation, metering, medical and consumer equipment. ISSI now lists the G revision as NR (not recommended for new designs) with IS42S16160J as the successor, so buyers maintaining qualified builds are seeking remaining G-revision stock. Cerametronics can quote traceable IS42S16160G-7TLI and the J-revision alternative within 24 hours.
Key Specifications
Verify against the original datasheet before quoting.
| Density / organization | 256Mb SDR SDRAM, 16M x 16 (4 banks x 4M x 16) |
|---|---|
| Speed grade | -7: 143 MHz clock |
| Supply voltage | 3.3 V (LVTTL interface) |
| Package | 54-pin TSOP II (TL = lead-free TSOP II) |
| Operating temperature | -40 °C to +85 °C (industrial, I) |
| Refresh / status | 8K refresh cycles; ISSI product status: NR (not recommended for new designs), successor IS42S16160J |
Market Status — as of October 2026
Allocated – Limited Market Stock Factory lead time is currently around 6 weeks.
Quality & Traceability
Cerametronics is ISO 9001 certified and products are RoHS compliant, with counterfeit screening and full traceability on every shipment. A Certificate of Conformance is available on request. For allocation-sensitive or high-risk lots, independent third-party lab verification can be arranged — just flag it on your RFQ. Any lot that fails incoming inspection is quarantined and never shipped.
FAQ
Is IS42S16160G-7TLI being discontinued?
ISSI lists the G revision as NR – not recommended for new designs – while the pin-compatible IS42S16160J is the production part. Existing designs qualified on the G revision can keep using it from channel and spot stock; new designs should move to the J revision.
What applications still use 256Mb SDR SDRAM?
Low-end MCUs, FPGAs and SoCs with SDR memory controllers are still common in industrial automation, metering, medical and consumer devices with long product lives. The 16M x 16 organization at 143 MHz is one of the most widely designed-in SDR densities, which is why industrial-grade stock remains in demand.
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