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FM93CS66 (MICROWIRE Bus Interface) 4096-Bit Serial EEPROM
with Data Protect and Sequential Read
July 2000
FM93CS66
(MICROWIRE™ Bus Interface) 4096-Bit Serial EEPROM
with Data Protect and Sequential Read
General Description
FM93CS66 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.
FM93CS66 offers programmable write protection to the memory
array using a special register called Protect Register. Selected
memory locations can be protected against write by programming
this Protect Register with the address of the first memory location
to be protected (all locations greater than or equal to this first
address are then protected from further change). Additionally, this
address can be “permanently locked” into the device, making all
future attempts to change data impossible. In addition this device
features “sequential read”, by which, entire memory can be read
in one cycle instead of multiple single byte read cycles. There are
10 instructions implemented on the FM93CS66, 5 of which are for
memory operations and the remaining 5 are for Protect Register
operations. This device is fabricated using Fairchild Semiconduc-
tor floating-gate CMOS process for high reliability, high endurance
and low power consumption.
“LZ” and “L” versions of FM93CS66 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
I
Wide V
CC
2.7V - 5.5V
I
Programmable write protection
I
Sequential register read
I
Typical active current of 200µA
10µA standby current typical
1µA standby current typical (L)
0.1µA 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
PRE
PE
ADDRESS
REGISTER
PROTECT
REGISTER
COMPARATOR
AND
WRITE ENABLE
HIGH VOLTAGE
GENERATOR
AND
PROGRAM
TIMER
DECODER
EEPROM ARRAY
16
READ/WRITE AMPS
16
V
SS
DATA IN/OUT REGISTER
16 BITS
DO
DATA OUT BUFFER
© 2000 Fairchild Semiconductor International
FM93CS66 Rev. C.1
1
www.fairchildsemi.com
FM93CS66 (MICROWIRE Bus Interface) 4096-Bit Serial EEPROM
with Data Protect and Sequential Read
Connection Diagram
Dual-In-Line Package (N)
8–Pin SO (M8) and 8–Pin TSSOP (MT8)
CS
SK
DI
DO
1
2
3
4
8
7
6
5
V
CC
PRE
PE
GND
Top View
Package Number
N08E, M08A and MTC08
Pin Names
CS
SK
DI
DO
GND
PE
PRE
V
CC
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Program Enable
Protect Register Enable
Power Supply
Ordering Information
FM
93
CS
XX
LZ
E
XXX
Package
Letter
N
M8
MT8
None
V
E
Blank
L
LZ
66
C
CS
Interface
93
Description
8-pin DIP
8-pin SO
8-pin TSSOP
0 to 70°C
-40 to +125°C
-40 to +85°C
4.5V to 5.5V
2.7V to 5.5V
2.7V to 5.5V and
<1µA Standby Current
4096 bits
CMOS
Data protect and sequential
read
MICROWIRE
Temp. Range
Voltage Operating Range
Density
Fairchild Memory Prefix
2
FM93CS66 Rev. C.1
www.fairchildsemi.com
FM93CS66 (MICROWIRE Bus Interface) 4096-Bit Serial EEPROM
with Data Protect and Sequential Read
Absolute Maximum Ratings
(Note 1)
Ambient Storage Temperature
All Input or Output Voltages
with Respect to Ground
Lead Temperature
(Soldering, 10 sec.)
ESD rating
-65°C to +150°C
+6.5V to -0.3V
Operating Conditions
Ambient Operating Temperature
FM93CS66
FM93CS66E
FM93CS66V
Power Supply (V
CC
)
0°C to +70°C
-40°C to +85°C
-40°C to +125°C
4.5V to 5.5V
+300°C
2000V
DC and AC Electrical Characteristics
V
CC
= 4.5V to 5.5V unless otherwise specified
Symbol
I
CCA
I
CCS
I
IL
I
OL
V
IL
V
IH
V
OL1
V
OH1
V
OL2
V
OH2
f
SK
t
SKH
t
SKL
t
CS
t
CSS
t
PRES
t
DH
t
PES
t
DIS
t
CSH
t
PEH
t
PREH
t
DIH
t
PD
t
SV
t
DF
t
WP
Parameter
Operating Current
Standby Current
Input Leakage
Output Leakage
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Output Low Voltage
Output High Voltage
SK Clock Frequency
SK High Time
SK Low Time
Minimum CS Low Time
CS Setup Time
PRE Setup Time
DO Hold Time
PE Setup Time
DI Setup Time
CS Hold Time
PE Hold Time
PRE Hold Time
DI Hold Time
Output Delay
CS to Status Valid
CS to DO in Hi-Z
Write Cycle Time
Conditions
CS = V
IH
, SK=1.0 MHz
CS = V
IL
V
IN
= 0V to V
CC
(Note 2)
Min
Max
1
50
±-1
Units
mA
µA
µA
V
V
V
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
-0.1
2
I
OL
= 2.1 mA
I
OH
= -400
µA
I
OL
= 10
µA
I
OH
= -10
µA
(Note 3)
0°C to +70°C
-40°C to +125°C
(Note 4)
250
300
250
250
50
50
70
50
100
0
250
50
20
2.4
0.8
V
CC
+1
0.4
0.2
V
CC
- 0.2
1
500
500
CS = V
IL
100
10
ns
ns
ns
ms
3
FM93CS66 Rev. C.1
www.fairchildsemi.com
FM93CS66 (MICROWIRE Bus Interface) 4096-Bit Serial EEPROM
with Data Protect and Sequential Read
Absolute Maximum Ratings
(Note 1)
Ambient Storage Temperature
All Input or Output Voltages
with Respect to Ground
Lead Temperature
(Soldering, 10 sec.)
ESD rating
-65°C to +150°C
+6.5V to -0.3V
Operating Conditions
Ambient Operating Temperature
FM93CS66L/LZ
FM93CS66LE/LZE
FM93CS66LV/LZV
Power Supply (V
CC
)
0°C to +70°C
-40°C to +85°C
-40°C to +125°C
2.7V to 5.5V
+300°C
2000V
DC and AC Electrical Characteristics
V
CC
= 2.7V to 4.5V unless otherwise specified. Refer to
page 3 for V
CC
= 4.5V to 5.5V.
Symbol
I
CCA
I
CCS
Parameter
Operating Current
Standby Current
L
LZ (2.7V to 4.5V)
Input Leakage
Output Leakage
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
SK Clock Frequency
SK High Time
SK Low Time
Minimum CS Low Time
CS Setup Time
PRE Setup Time
DO Hold Time
PE Setup Time
DI Setup Time
CS Hold Time
PE Hold Time
PRE Hold Time
DI Hold Time
Output Delay
CS to Status Valid
CS to DO in Hi-Z
Write Cycle Time
Conditions
CS = V
IH
, SK=256 KHz
CS = V
IL
Min
Max
1
10
1
±1
Units
mA
µA
µA
µA
V
V
KHz
µs
µs
µs
µs
ns
ns
ns
µs
ns
ns
ns
I
IL
I
OL
V
IL
V
IH
V
OL
V
OH
f
SK
t
SKH
t
SKL
t
CS
t
CSS
t
PRES
t
DH
t
PES
t
DIS
t
CSH
t
PEH
t
PREH
t
DIH
t
PD
t
SV
t
DF
t
WP
V
IN
= 0V to V
CC
(Note 2)
-0.1
0.8V
CC
I
OL
= 10µA
I
OH
= -10µA
(Note 3)
0.9V
CC
0
1
1
1
0.2
50
70
50
0.4
0
250
50
0.4
0.15V
CC
V
CC
+1
0.1V
CC
250
(Note 4)
2
1
CS = V
IL
0.4
15
µs
µs
µs
µs
ms
Capacitance
T
A
= 25°C, f = 1 MHz or 256
KHz (Note 5)
Symbol
C
OUT
C
IN
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.
Test
Output Capacitance
Input Capacitance
Typ
Max
5
5
Units
pF
pF
Note 3:
The shortest allowable SK clock period = 1/f
SK
(as shown under the f
SK
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 t
SKH
and t
SKL
limits must be observed. Therefore, it is not
allowable to set 1/f
SK
= t
SKHminimum
+ t
SKLminimum
for shorter SK cycle time operation.
Note 4:
CS (Chip Select) must be brought low (to V
IL
) for an interval of t
CS
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.
AC Test Conditions
V
CC
Range
(Extended Voltage Levels)
V
IL
/V
IH
Input Levels
0.3V/1.8V
0.4V/2.4V
V
IL
/V
IH
Timing Level
1.0V
1.0V/2.0V
V
OL
/V
OH
Timing Level
0.8V/1.5V
0.4V/2.4V
I
OL
/I
OH
±10µA
2.1mA/-0.4mA
2.7V
≤
V
CC
≤
5.5V
(TTL Levels)
4.5V
≤
V
CC
≤
5.5V
Output Load: 1 TTL Gate (C
L
= 100 pF)
4
FM93CS66 Rev. C.1
www.fairchildsemi.com
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