Analog Devices Inc./Maxim Integrated DS1230YP-70+

Overview

DS1230YP-70+ from Maxim Integrated is a 256k (32k × 8) nonvolatile static RAM with integrated lithium backup, JEDEC-standard 34-pin PowerCap Module (PCM) package, 70 ns access time, ±10% V_CC tolerance (4.5 V to 5.5 V), and industrial-grade data retention of ≥10 years without external power. It serves as a drop-in replacement for volatile SRAM in battery-backed memory systems requiring zero write-cycle limits and automatic power-fail protection.

For engineers reviewing the DS1230YP-70+ datasheet, DS1230YP-70+ pinout, DS1230YP-70+ application, or DS1230YP-70+ equivalent, key selection considerations include its PCM surface-mount compatibility, V_TP = 4.25 V write-protection threshold, 34-pin terminal mapping with dedicated V_BAT, and seamless integration with DS9034PC+ PowerCap for reflow-safe assembly.

Technical Context

The DS1230YP-70+ implements a self-monitoring nonvolatile architecture where internal circuitry continuously tracks V_CC; when voltage drops below 4.25 V, it unconditionally enables write protection and switches to lithium backup within 1.5 µs. Its read/write timing conforms to standard asynchronous SRAM protocols with t_ACC = 70 ns, t_WC = 70 ns, and t_OE = 35 ns, supporting direct microprocessor interfacing without support logic.

Unlike EEPROM or Flash, it delivers unlimited write cycles and true byte-level random access with no erase latency. The PowerCap Module design isolates the lithium cell from reflow soldering by separating the PCM substrate (34-pin SMT footprint) from the snap-on DS9034PC+ PowerCap, preserving battery freshness until first power application.

Key Specifications

Pinout & Package

DS1230YP-70+ uses a 34-pin PowerCap Module (PCM) package: a surface-mount substrate with standardized pinout for nonvolatile SRAMs, designed for reflow soldering prior to attachment of the DS9034PC+ PowerCap. The PCM includes dedicated V_BAT and GND terminals for battery connection, and all control/data signals match industry-standard SRAM timing.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar nonvolatile SRAM applications.

Compared with DS1230Y-70+ and STK12C68, DS1230YP-70+ uniquely combines 70 ns performance, SMT-ready PCM packaging, and precise 4.25 V write-protection - making it optimal for new industrial and medical designs requiring automated assembly and deterministic power-loss response.

Availability

DS1230YP-70+ is available at Aetrix Electronics and suitable for industrial data loggers, medical device memory buffers, POS terminal transaction caches, and telecom base station configuration stores requiring stable component supply, long-lifecycle assurance, and RoHS-compliant sourcing.

Supply support for DS1230YP-70+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in analog, mixed-signal, and high-reliability ICs for industrial, medical, and communications applications.

The DS1230Y/AB product line delivers nonvolatile SRAM solutions optimized for mission-critical memory backup where data integrity during power failure is non-negotiable - targeting applications demanding zero write endurance limits and guaranteed 10-year retention.

FAQ

What is the function of the V_BAT pin on the DS1230YP-70+?

The V_BAT pin on the DS1230YP-70+ provides the dedicated connection point for the lithium backup battery housed in the DS9034PC+ PowerCap. Unlike integrated-battery variants, this pin remains electrically isolated until the first application of V_CC > 4.25 V, ensuring full energy capacity is preserved. During power loss, the internal switch connects V_BAT to sustain SRAM contents without external circuitry.

Does the DS1230YP-70+ require external support components for nonvolatile operation?

No, the DS1230YP-70+ requires no external support components for nonvolatile operation. Its internal control circuitry autonomously monitors V_CC, enables write protection below 4.25 V, and switches to lithium backup - all without external capacitors, regulators, or supervisory ICs. The DS1230YP-70+ functions as a complete plug-and-play nonvolatile memory solution when paired with DS9034PC+.

Can the DS1230YP-70+ be used as a direct replacement for standard 32k × 8 SRAMs?

Yes, the DS1230YP-70+ is functionally and timing-compatible with standard 32k × 8 volatile SRAMs, including identical address/data/control pinouts and 70 ns access time. Its CE/WE/OE interface matches industry-standard asynchronous SRAM protocols, allowing drop-in replacement in existing designs - provided the PCB layout accommodates the 34-pin PCM footprint and provisions for DS9034PC+ attachment.

What is the significance of the "P" suffix in DS1230YP-70+?

The "P" suffix in DS1230YP-70+ denotes the PowerCap Module (PCM) package variant - a 34-pin surface-mount substrate designed for reflow soldering, distinct from the 28-pin DIP versions. This suffix identifies the device as requiring the separate DS9034PC+ or DS9034PCI+ snap-on PowerCap for lithium backup functionality, enabling SMT compatibility while preserving battery integrity.

How does the DS1230YP-70+ ensure data integrity during rapid V_CC transients?

The DS1230YP-70+ ensures data integrity during rapid V_CC transients via a dedicated power-fail detection circuit with 1.5 µs response time (t_PD). When V_CC falls below 4.25 V, it immediately disables write capability, places all outputs in high-impedance state, and activates lithium backup - preventing partial writes or bus contention. This behavior is guaranteed across the full 0°C to +70°C operating range and verified per Maxim's production test flow for DS1230YP-70+.