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NM93C66A Datasheet

  • NM93C66A

  • 4K-Bit Serial CMOS EEPROM (MICROWIRE⑩ Synchronous Bus)

  • 13頁(yè)

  • FAIRCHILD

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NM93C66A 4K-Bit Serial CMOS EEPROM
(MICROWIRE
TM
Synchronous Bus)
February 2000
NM93C66A
4K-Bit Serial CMOS EEPROM
(MICROWIRE鈩?Synchronous Bus)
General Description
NM93C66A is a 4096-bit CMOS non-volatile EEPROM organized
as 256 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
CC
, then 16-bit
format is selected. There are 7 instructions implemented on the
NM93C66A 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.
鈥淟Z鈥?and 鈥淟鈥?versions of NM93C66A 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.
Features
I
Wide V
CC
2.7V - 5.5V
I
User selectable organization
x16 (ORG = 1)
x8 (ORG = 0)
I
Typical active current of 200碌A(chǔ)
10碌A(chǔ) standby current typical
1碌A(chǔ) standby current typical (L)
0.1碌A(chǔ) standby current typical (LZ)
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
Functional Diagram
CS
SK
DI
INSTRUCTION
REGISTER
V
CC
INSTRUCTION
DECODER
CONTROL LOGIC
AND CLOCK
GENERATORS
ADDRESS
REGISTER
HIGH VOLTAGE
GENERATOR
AND
PROGRAM
TIMER
ORG
DECODER
EEPROM ARRAY
16
READ/WRITE AMPS
16
V
SS
DATA IN/OUT REGISTER
16/8 BITS
DO
DATA OUT BUFFER
漏 2000 Fairchild Semiconductor International
NM93C66A Rev. E.1
1
www.fairchildsemi.com

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