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  Microchip Technology Semiconductor Electronic Components Datasheet  

93LCS56 Datasheet

2K/4K 2.5V Microwire Serial EEPROM

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Obsolete Device
93LCS56/66
2K/4K 2.5V Microwire® Serial EEPROM with Software Write Protect
FEATURES
• Single supply with programming operation down
to 2.5V
• Low power CMOS technology
- 1 mA active current typical
- 5 µA standby current (typical) at 3.0V
• x16 memory organization
- 128x16 (93LCS56)
- 256x16 (93LCS66)
• Software write protection of user defined memory
space
• Self timed erase and write cycles
• Automatic ERAL before WRAL
• Power on/off data protection
• Industry standard 3-wire serial I/O
• Device status signal during E/W
• Sequential READ function
• 1,000,000 E/W cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP/SOIC and 14-pin SOIC packages
• Temperature ranges supported
- Commercial (C):
- Industrial (I):
0°C to +70°C
-40°C to +85°C
BLOCK DIAGRAM
V CC
V SS
MEMORY
ARRAY
ADDRESS
DECODER
DI
PRE
PE
CS
CLK
DATA REGISTER
MODE
DECODE
LOGIC
CLOCK
GENERATOR
ADDRESS
COUNTER
OUTPUT
BUFFER
DO
DESCRIPTION
The Microchip Technology Inc. 93LCS56/66 are low volt-
age Serial Electrically Erasable PROMs with memory
capacities of 2K bits/4K bits respectively. A write protect
register is included in order to provide a user defined
region of write protected memory. All memory locations
greater than or equal to the address placed in the write
protect register will be protected from any attempted write
or erase operation. It is also possible to protect the
address in the write protect register permanently by using
a one time only instruction (PRDS). Any attempt to alter
data in a register whose address is equal to or greater
than the address stored in the protect register will be
aborted. Advanced CMOS technology makes this device
ideal for low power non-volatile memory applications.
PACKAGE TYPES
CS
CLK
DI
DO
DIP
18
27
36
45
93LCS56
93LCS66
VCC
PRE
PE
VSS
CS
CLK
DI
DO
SOIC
18
27
36
45
93LCS56
93LCS66
VCC
PRE
PE
VSS
NC
CS
CLK
NC
DI
DO
NC
SOIC
1 14
2 13
3 12
4 11
5 10
69
78
93LCS56
93LCS66
NC
VCC
PRE
NC
PE
VSS
NC
Microwire is a registered trademark of National Semiconductor Incorporated.
2004 Microchip Technology Inc.
DS11181E-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

93LCS56 Datasheet

2K/4K 2.5V Microwire Serial EEPROM

No Preview Available !

93LCS56/66
1.0 ELECTRICAL CHARACTERISTICS
1.1 Maximum Ratings*
VCC...................................................................................7.0V
All inputs and outputs w.r.t. VSS ............... -0.6V to VCC +1.0V
Storage temperature .....................................-65°C to +150°C
Ambient temp. with power applied ................-65°C to +125°C
Soldering temperature of leads (10 seconds) ............. +300°C
ESD protection on all pins................................................4 kV
*Notice: Stresses above those listed under “Maximum ratings”
may cause permanent damage to the device. This is a stress rat-
ing only and functional operation of the device at those or any
other conditions above those indicated in the operational listings
of this specification is not implied. Exposure to maximum rating
conditions for extended periods may affect device reliability.
TABLE 1-1:
Name
CS
CLK
DI
DO
VSS
PE
PRE
VCC
PIN FUNCTION TABLE
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Program Enable
Protect Register Enable
Power Supply
TABLE 1-2: DC AND AC ELECTRICAL CHARACTERISTICS
VCC = +2.5V to +6.0V
Commercial(C): Tamb = 0°C to +70°C
Industrial (I): Tamb = -40°C to +85°C
Parameter
Symbol
Min
Max Units
High level input voltage
VIH
Low level input voltage
VIL
Low level output voltage VOL1
VOL2
High level output voltage VOH1
VOH2
Input leakage current
ILI
Output leakage current
ILO
Pin capacitance
(all inputs/outputs)
CIN, COUT
Operating current
ICC Write
ICC Read
2.0
-0.3
2.4
VCC-0.2
-10
-10
Standby current
ICCS
VCC +1
0.8
0.4
0.2
10
10
7
3
1
500
100
30
V
V
V
V
V
V
µA
µA
pF
mA
mA
µA
µA
µA
Clock frequency
FCLK
2 MHz
1 MHz
Clock high time
TCKH
250
ns
Clock low time
TCKL
250
ns
Chip select setup time
TCSS
50
ns
Chip select hold time
TCSH
0
— ns
Chip select low time
TCSL
250
ns
PRE setup time
TPRES
100
ns
PE setup time
TPES
100
ns
PRE hold time
TPREH
0
— ns
PE hold time
TPEH
500
ns
Data input setup time
TDIS
100
ns
Data input hold time
TDIH
100
ns
Data output delay time
TPD
400
ns
Data output disable time TCZ
100
ns
Note 1: This parameter is tested at Tamb = 25°C and FCLK = 1 MHz.
2: This parameter is periodically sampled and not 100% tested.
Conditions
VCC 2.5V
VCC 2.5V
IOL = 2.1 mA; VCC = 4.5V
IOL = 100 µA; VCC = 2.5V
IOH = -400µA; VCC = 4.5V
IOH = -100µA; VCC = 2.5V
VIN = 0.1V to VCC
VOUT = 0.1V to Vcc
VIN/VOUT = 0V (Note 1 & 2)
Tamb = +25°C; FCLK = 1 MHz
FCLK = 2 MHz; VCC = 3.0V (Note 2)
FCLK = 2 MHz; VCC = 6.0V
FCLK = 1 MHz; VCC = 3.0V
CLK = CS = 0V; VCC = 6.0V
CLK = CS = 0V; VCC = 3.0V
DI = PE = PRE = VSS
VCC 4.5V
VCC < 4.5V
Relative to CLK
Relative to CLK
Relative to CLK
Relative to CLK
Relative to CLK
Relative to CLK
Relative to CLK
Relative to CLK
CL=100 pF
CL=100 pF (Note 2)
DS11181E-page 2
2004 Microchip Technology Inc.


Part Number 93LCS56
Description 2K/4K 2.5V Microwire Serial EEPROM
Maker Microchip Technology
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93LCS56 Datasheet PDF






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