NM93C46AM8 Fairchild Semiconductor, NM93C46AM8 Datasheet

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NM93C46AM8

Manufacturer Part Number
NM93C46AM8
Description
1024-Bit Serial EEPROM (MICROWIRE Bus Interface)
Manufacturer
Fairchild Semiconductor
Datasheet
© 2000 Fairchild Semiconductor International
NM93C46A Rev. F
NM93C46A is a 1024-bit CMOS non-volatile EEPROM organized
as 64 x 16-bit array. This device features MICROWIRE interface
which is a 4-wire serial bus with chipselect (CS), clock (SK), data
input (DI) and data output (DO) signals. This interface is compat-
ible to many of standard Microcontrollers and Microprocessors.
This device offers a pin (ORG), using which, the user can select
the format of the data (16-bit or 8-bit). If ORG is tied to GND, then
8-bit format is selected, while if ORG is tied to V
format is selected. There are 7 instructions implemented on the
NM93C46A for various Read, Write, Erase, and Write Enable/
Disable operations. This device is fabricated using Fairchild
Semiconductor floating-gate CMOS process for high reliability,
high endurance and low power consumption.
“LZ” and “L” versions of NM93C46A offer very low standby current
making them suitable for low power applications. This device is
offered in both SO and TSSOP packages for small space consid-
erations.
ORG
DO
CS
SK
DI
INSTRUCTION
REGISTER
ADDRESS
REGISTER
DECODER
CC
, then 16-bit
DATA IN/OUT REGISTER
DATA OUT BUFFER
READ/WRITE AMPS
EEPROM ARRAY
16/8 BITS
16
16
CONTROL LOGIC
GENERATORS
INSTRUCTION
AND CLOCK
DECODER
I Wide V
I User selectable organization
I Typical active current of 200µA
I No Erase instruction required before Write instruction
I Self timed write cycle
I Device status during programming cycles
I 40 year data retention
I Endurance: 1,000,000 data changes
I Packages available: 8-pin SO, 8-pin DIP, 8-pin TSSOP
x16 (ORG = 1)
x8 (ORG = 0)
10µA standby current typical
1µA standby current typical (L)
0.1µA standby current typical (LZ)
CC
2.7V - 5.5V
HIGH VOLTAGE
GENERATOR
PROGRAM
TIMER
AND
V
V
CC
SS
February 2000
www.fairchildsemi.com

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NM93C46AM8 Summary of contents

Page 1

... CS SK INSTRUCTION DI REGISTER ADDRESS REGISTER ORG DECODER DO © 2000 Fairchild Semiconductor International NM93C46A Rev Wide V 2. User selectable organization x16 (ORG = 1) x8 (ORG = 0) I Typical active current of 200µA 10µA standby current typical 1µA standby current typical (L) , then 16-bit CC 0.1µ ...

Page 2

Pins designated as "NC" are typically unbonded pins. However some of them are bonded for special testing purposes. Hence if a signal is applied to these pins, care should be taken that ...

Page 3

Ambient Storage Temperature All Input or Output Voltages with Respect to Ground Lead Temperature (Soldering, 10 sec.) ESD rating I Operating Current CCA I Standby Current CCS I Input Leakage IL I Output Leakage OL I Input Leakage ORG Pin ...

Page 4

Ambient Storage Temperature All Input or Output Voltages with Respect to Ground Lead Temperature (Soldering, 10 sec.) ESD rating I Operating Current CCA I Standby Current CCS L LZ (2.7V to 4.5V) I Input Leakage IL I Output Leakage OL ...

Page 5

This is an active high input pin to NM93C46A EEPROM (the device) and is generated by a master that is controlling the device. A high level on this pin selects the device and a low level deselects the device. All ...

Page 6

Instruction Start Bit READ 1 WEN 1 WRITE 1 WRALL 1 WDS 1 ERASE 1 ERAL 1 A typical Microwire cycle starts by first selecting the device (bringing the CS signal high). Once the device is selected, a valid Start ...

Page 7

Write Disable (WDS) instruction disables all programming opera- tions and should follow all programming operations. Executing this instruction after a valid write instruction would protect against accidental data disturb due to spurious noise, glitches, inadvert- ent writes etc. Input information ...

Page 8

SYNCHRONOUS DATA TIMING SKS CSS SK t DIS Valid Input DI DO (Data Read (Status Read) READ CYCLE (READ Star t Opcode Bit Bits( =A5; D 93C46A ...

Page 9

ERASE/WRITE DISABLE CYCLE (EWDS = ...

Page 10

ERASE CYCLE (ERASE Star t Bit DO A 93C46A (ORG=1; n Address bits patter n -> A5-A4-A3-A2-A1-A0; User defined A 93C46A (ORG=0; n Address bits patter n -> A6-A5-A4-A3-A2-A1-A0; User defined ERASE ALL CYCLE (ERAL) CS ...

Page 11

All lead tips Typ. All Leads NM93C46A Rev. F 0.189 - 0.197 (4.800 ...

Page 12

Pin #1 IDENT 0.0433 Max (1.1) 0.0256 (0.65) Typ. Notes: Unless otherwise specified 1. Reference ...

Page 13

... Fairchild's products are not authorized for use as critical components in life support devices or systems without the express written approval of the President of Fairchild Semiconductor Corporation. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support ...

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