nm93c46 Fairchild Semiconductor, nm93c46 Datasheet

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nm93c46

Manufacturer Part Number
nm93c46
Description
1024-bit Serial Cmos Eeprom Microwire ?ynchronous Bus
Manufacturer
Fairchild Semiconductor
Datasheet

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© 2000 Fairchild Semiconductor International
NM93C46 Rev. E
NM93C46 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.
There are 7 instructions implemented on the NM93C46 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 NM93C46 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.
DO
CS
SK
DI
INSTRUCTION
REGISTER
ADDRESS
REGISTER
DECODER
DATA IN/OUT REGISTER
DATA OUT BUFFER
READ/WRITE AMPS
EEPROM ARRAY
16
16
16 BITS
CONTROL LOGIC
GENERATORS
INSTRUCTION
AND CLOCK
DECODER
I Wide V
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
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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nm93c46 Summary of contents

Page 1

... CMOS process for high reliability, high endurance and low power consumption. “LZ” and “L” versions of NM93C46 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 ...

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 the voltage applied on these pins does not exceed the NM93C46 Rev ...

Page 3

... CSH t DI Hold Time DIH t Output Delay Status Valid Hi Write Cycle Time WP NM93C46 Rev. E (Note 1) -65°C to +150°C Ambient Operating Temperature NM93C46 +6.5V to -0.3V NM93C46E NM93C46V +300°C Power Supply ( 2000V V = 4.5V to 5.5V unless otherwise specified SK=1 ...

Page 4

... MHz (Note Output Capacitance OUT C Input Capacitance IN 2.7V ≤ V ≤ 5.5V 0.3V/1.8V CC (Extended Voltage Levels) 4.5V ≤ V ≤ 5.5V 0.4V/2.4V CC (TTL Levels) NM93C46 Rev. E (Note 1) -65°C to +150°C Ambient Operating Temperature NM93C46L/LZ +6.5V to -0.3V NM93C46LE/LZE NM93C46LV/LZV +300°C Power Supply ( 2000V V = 2.7V to 5.5V unless otherwise specified SK=1.0 MHz ...

Page 5

... This is an active high input pin to NM93C46 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 serial communications with the device is enabled only when this pin is held high. However this pin cannot be permanently ...

Page 6

... DC and AC Electrical Characteristics table) for the internal programming cycle to finish. During this time, the device remains busy and is not ready for another instruction. NM93C46 Rev. E The status of the internal programming cycle can be polled at any time by bringing the CS signal high again, after t CS signal is high, the DO pin indicates the READY/BUSY status of the chip ...

Page 7

... ALL” instruction, respectively. The “ERASE” and “ERASE ALL” instructions are included to maintain compatibility with earlier technology EEPROMs.Clearing of Ready/Busy status NM93C46 Rev. E When programming is in progress, the Data-Out pin will display the programming status as either BUSY (low) or READY (high) when CS is brought high (DO output will be tri-stated when CS is low) ...

Page 8

... WRITE ENABLE CYCLE (WEN > > NM93C46 Rev SKH SKL t DIH Valid Input t ...

Page 9

... > > > NM93C46 Rev ...

Page 10

... Address bits patter n -> 1-0-x-x-x-x CLEARING READY STATUS High - Z DO Note: This Star t bit can also be par next instr uction. Hence the cycle can be continued (instead of getting ter minated, as shown new instr uction is being issued. NM93C46 Rev ...

Page 11

... All lead tips Typ. All Leads NM93C46 Rev. E 0.189 - 0.197 (4.800 - 5.004 0.228 - 0.244 (5.791 - 6.198 Lead #1 IDENT 0.053 - 0.069 (1.346 - 1.753) 8° ...

Page 12

... Pin #1 IDENT 0.0433 Max (1.1) 0.0256 (0.65) Typ. Notes: Unless otherwise specified 1. Reference JEDEC registration MO153. Variation AA. Dated 7/93 NM93C46 Rev 0.169 - 0.177 (4.30 - 4.50) (1.78) Typ (0.42) Typ Land pattern recommendation 4 See detail A 0.002 - 0.006 (0.05 - 0.15) 0.0075 - 0.0098 (0.19 - 0.30) 0°-8° DETAIL A Typ. Scale: 40X ...

Page 13

... English Français Italiano Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. NM93C46 Rev. E 0.373 - 0.400 (9.474 - 10.16) 0.090 (2.286) ...

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