IEEE Consumer Electronics Magazine - July 2018 - 89

products will be in the 22-28-nm lithog-
raphy nodes.
Global Foundries' MRAM memory
products, called eMRAM, combined
with SRAM, can undergo a power cycle
with no time or energy penalty, which
allows for frequent sleep modes and
other power saving operations. Properly
designed eMRAM can be reliable for
automobile applications in harsh envi-
ronments while supplying local memory
for dictionaries supporting voice control
and providing significant fast memory

support for intelligent clients equipped
with AI and virtual and augmented reali-
ty, including storage to support learning
on neural networks.
Global Foundries eMRAM features
two different embedded applications
called Macro 1 and Macro 2 (Figure 1).
Macro 1 is a slower device for code-
storage application while Macro 2 is a
quicker device focused on data and
state storage.
Two types of MRAM devices can
be used to enable embedded-product

Global Foundries eMRAM
features two different
embedded applications
called Macro 1 and
Macro 2.
supporting artificial intelligence (AI)
decision making. Large amounts of non-
volatile MRAM memory (in gigabits)
allow real-time analysis of big data and

GF 22FDX eMRAM-F Specification Table
Features

22 nm

Devices

4 Core Vt's (FBB, RBB, and eLVT),
2 I/O Vt's at 1.2/1.5/1.8 v, Passives, LDMOS (3.3/5.0/6.5 v)

Memories

HD, HC, LV, TP

Libraries

8T-HD, 12T-HP

Extensions

ULP (0.4 V), ULL, Radio Frequency/mm-Wave,
eMRAM, Automotive

Macros

Macro 1 Flash-Like

Macro 2 SRAM-Like

Bit Cell Configuration

1T-1MTJ

2T-2MTJ

Interface

eFlash

SRAM

Access Time (rd/wt)

25 ns/200 ns

15 ns/40 ns

Retention

>Ten Years

>Ten Years

Endurance

>1 M Cycles

To Be Determined**

Energy (pJ/b)

1

1

Maximum Temperature
Grade Expected

Ind/Automatic G1*

Ind/Automatic G1*

Solder Reflow

Yes

Yes

Mask Layer Adder

Four

Four

Node

22 nm

22 nm

PDK

V1.3 Available to Begin Design

MPW Shuttle

Quarterly; Starting Quarter 2, 2018
(a)

*Planned

(b)

(c)

**Under Test

FIGURE 1. (a) The Global Foundries embedded STT-MRAM features. An example of (b) a one transistor, one magnetic tunnel junction
(Macro 1: 1T-1MTJ) and (c) a two transistor, two magnetic tunnel junction (Macro 2: 2T-2MTJ). FBB: forward body bias; RBB: reverse body
bias; eLVT: low threshold voltage; Vt: threshold voltage; I/O: input/output; LDMOS: laterally diffused MOSFET; HD: high density; HC: high
current; LV: low voltage; HP: high performance; PDK: platform developers kit; MPW: multiproject wafer; Ind: industrial.

July 2018

^

IEEE Consumer Electronics Magazine

89



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