Fairchild Semiconductor NM93C46LMT8X, NM93C46LMT8, NM93C46LMS8, NM93C46LM8X, NM93C46WEM Datasheet

February 2000

NM93C46

1024-Bit Serial CMOS EEPROM

(MICROWIRE™ Synchronous Bus)

General Description

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 compatible 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 considerations.

Features

■Wide VCC 2.7V - 5.5V

■Typical active current of 200 A 10 A standby current typical 1 A standby current typical (L)

0.1 A standby current typical (LZ)

■No Erase instruction required before Write instruction

■Self timed write cycle

■Device status during programming cycles

■40 year data retention

■Endurance: 1,000,000 data changes

■Packages available: 8-pin SO, 8-pin DIP, 8-pin TSSOP

Functional Diagram

CS		INSTRUCTION	VCC
SK
		DECODER
		CONTROL LOGIC
DI	INSTRUCTION	AND CLOCK
		GENERATORS
	REGISTER
			HIGH VOLTAGE
	ADDRESS		GENERATOR
	REGISTER		AND
			PROGRAM
			TIMER
	DECODER	EEPROM ARRAY
		16
		READ/WRITE AMPS
		16	VSS
		DATA IN/OUT REGISTER
		16 BITS
DO		DATA OUT BUFFER

(MICROWIRE TM

Synchronous Bus)

EEPROM CMOS Serial Bit-1024 NM93C46

© 2000 Fairchild Semiconductor International

1

www.fairchildsemi.com

NM93C46 Rev. E

Connection Diagram

Dual-In-Line Package (N)

8–Pin SO (M8) and 8–Pin TSSOP (MT8)

CS			1	8			VCC	NC			1	8			NC

SK			2	Normal	7			NC	VCC			2	Rotated	7			GND
DI			3	Pinout	6			NC	CS			3	Pinout	6			DO
DO			4		5			GND	SK			4		5			DI

			Top View
		Package Number
		N08E, M08A and MTC08
Pin Names
	CS		Chip Select
	SK		Serial Data Clock
	DI		Serial Data Input
	DO		Serial Data Output
	GND		Ground
	NC		No Connect
	VCC		Power Supply

NOTE: 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 VCC applied to the device. This will ensure proper operation.

Ordering Information

NM

93

C

XX T

LZ

E

XXX

Letter Description

Package

N

8-pin DIP

M8

8-pin SO

MT8

8-pin TSSOP

Temp. Range

None

0 to 70°C

V

-40 to +125°C

E

-40 to +85°C

Voltage Operating Range

Blank

4.5V to 5.5V

L

2.7V to 5.5V

LZ

2.7V to 5.5V and

<1 A Standby Current

Blank

Normal Pinout

T

Rotated Pinout

Density

46

1024 bits

C

CMOS

CS

Data protect and sequential

read

Interface

93

MICROWIRE

Fairchild Memory Prefix

(MICROWIRE TM

Synchronous Bus)

EEPROM CMOS Serial Bit-1024 NM93C46

2	www.fairchildsemi.com

NM93C46 Rev. E

Absolute Maximum Ratings (Note 1)

Ambient Storage Temperature	-65°C to +150°C
All Input or Output Voltages	+6.5V to -0.3V
with Respect to Ground
Lead Temperature
(Soldering, 10 sec.)	+300°C
ESD rating	2000V

Operating Conditions

Ambient Operating Temperature
NM93C46	0°C to +70°C
NM93C46E	-40°C to +85°C
NM93C46V	-40°C to +125°C
Power Supply (VCC)	4.5V to 5.5V

DC and AC Electrical Characteristics VCC = 4.5V to 5.5V unless otherwise specified

Symbol	Parameter	Conditions	Min	Max	Units
ICCA	Operating Current	CS = VIH, SK=1.0 MHz		1	mA
ICCS	Standby Current	CS = VIL		50	A
IIL	Input Leakage	VIN = 0V to VCC		±-1	A
IOL	Output Leakage	(Note 2)
VIL	Input Low Voltage		-0.1	0.8	V
VIH	Input High Voltage		2	VCC +1
VOL1	Output Low Voltage	IOL = 2.1 mA		0.4	V
VOH1	Output High Voltage	IOH = -400 A	2.4
VOL2	Output Low Voltage	IOL = 10 A		0.2	V
VOH2	Output High Voltage	IOH = -10 A	VCC - 0.2
fSK	SK Clock Frequency	(Note 3)		1	MHz
tSKH	SK High Time	0°C to +70°C	250		ns
		-40°C to +125°C	300
tSKL	SK Low Time		250		ns
tSKS	SK Setup Time		50		ns
tCS	Minimum CS Low Time	(Note 4)	250		ns
tCSS	CS Setup Time		100		ns
tDH	DO Hold Time		70		ns
tDIS	DI Setup Time		100		ns
tCSH	CS Hold Time		0		ns
tDIH	DI Hold Time		20		ns
tPD	Output Delay			500	ns
tSV	CS to Status Valid			500	ns
tDF	CS to DO in Hi-Z	CS = VIL		100	ns
tWP	Write Cycle Time			10	ms

(MICROWIRE TM

Synchronous Bus)

EEPROM CMOS Serial Bit-1024 NM93C46

3	www.fairchildsemi.com

NM93C46 Rev. E

Absolute Maximum Ratings (Note 1)

Ambient Storage Temperature	-65°C to +150°C
All Input or Output Voltages	+6.5V to -0.3V
with Respect to Ground
Lead Temperature
(Soldering, 10 sec.)	+300°C
ESD rating	2000V

Operating Conditions

Ambient Operating Temperature
NM93C46L/LZ	0°C to +70°C
NM93C46LE/LZE	-40°C to +85°C
NM93C46LV/LZV	-40°C to +125°C
Power Supply (VCC)	2.7V to 5.5V

DC and AC Electrical Characteristics VCC = 2.7V to 5.5V unless otherwise specified

Symbol	Parameter	Conditions	Min	Max	Units
ICCA	Operating Current	CS = VIH, SK=1.0 MHz		1	mA
ICCS	Standby Current	CS = VIL			A
	L			10
	LZ (2.7V to 4.5V)			1	A
IIL	Input Leakage	VIN = 0V to VCC		±1	A
IOL	Output Leakage	(Note 2)
VIL	Input Low Voltage		-0.1	0.15VCC	V
VIH	Input High Voltage		0.8VCC	VCC +1
VOL	Output Low Voltage	IOL = 10 A		0.1VCC	V
VOH	Output High Voltage	IOH = -10 A	0.9VCC
fSK	SK Clock Frequency	(Note 3)	0	250	KHz
tSKH	SK High Time		1		s
tSKL	SK Low Time		1		s
tSKS	SK Setup Time		0.2		s
tCS	Minimum CS Low Time	(Note 4)	1		s
tCSS	CS Setup Time		0.2		s
tDH	DO Hold Time		70		ns
tDIS	DI Setup Time		0.4		s
tCSH	CS Hold Time		0		ns
tDIH	DI Hold Time		0.4		s
tPD	Output Delay			2	s
tSV	CS to Status Valid			1	s
tDF	CS to DO in Hi-Z	CS = VIL		0.4	s
tWP	Write Cycle Time			15	ms

Capacitance TA = 25°C, f = 1 MHz (Note 5)

Symbol	Test	Typ	Max	Units
COUT	Output Capacitance		5	pF
CIN	Input Capacitance		5	pF

AC Test Conditions

Note 1: Stress above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Note 2: Typical leakage values are in the 20nA range.

Note 3: The shortest allowable SK clock period = 1/fSK (as shown under the fSK parameter). Maximum SK clock speed (minimum SK period) is determined by the interaction of several AC parameters stated in the datasheet. Within this SK period, both tSKH and tSKL limits must be observed. Therefore, it is not allowable to set 1/fSK = tSKHminimum + tSKLminimum for shorter SK cycle time operation.

Note 4: CS (Chip Select) must be brought low (to VIL) for an interval of tCS in order to reset all internal device registers (device reset) prior to beginning another opcode cycle. (This is shown in the opcode diagram on the following page.)

Note 5: This parameter is periodically sampled and not 100% tested.

VCC Range	VIL/VIH	VIL/VIH	VOL/VOH	IOL/IOH
	Input Levels	Timing Level	Timing Level
2.7V ≤ VCC ≤ 5.5V	0.3V/1.8V	1.0V	0.8V/1.5V	±10 A
(Extended Voltage Levels)
4.5V ≤ VCC ≤ 5.5V	0.4V/2.4V	1.0V/2.0V	0.4V/2.4V	2.1mA/-0.4mA
(TTL Levels)
	Output Load: 1 TTL Gate (CL = 100 pF)

(MICROWIRE TM

Synchronous Bus)

EEPROM CMOS Serial Bit-1024 NM93C46

4	www.fairchildsemi.com

NM93C46 Rev. E