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PDF 93LC56A Data sheet ( Hoja de datos )
| Número de pieza | 93LC56A | |
| Descripción | 2K 2.5V Microwave Serial EEPROM | |
| Fabricantes | Microchip Technology | |
| Logotipo |  |
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M
93LC56A/B
2K 2.5V Microwire® Serial EEPROM
FEATURES
• Single supply with operation down to 2.5V
• Low power CMOS technology
- 1 mA active current (typical)
- 1 µA standby current (maximum)
• 256 x 8 bit organization (93LC56A)
• 128 x 16 bit organization (93LC56B)
• Self-timed ERASE and WRITE cycles
(including auto-erase)
• Automatic ERAL before WRAL
• Power on/off data protection circuitry
• Industry standard 3-wire serial interface
• Device status signal during ERASE/WRITE cycles
• Sequential READ function
• 1,000,000 E/W cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP/SOIC and 8-pin TSSOP packages
• Available for the following temperature ranges:
- Commercial (C):
- Industrial (I):
0°C to +70°C
-40°C to +85°C
PACKAGE TYPE
DIP
SOIC
BLOCK DIAGRAM
MEMORY
ARRAY
ADDRESS
DECODER
DI
CS
CLK
DATA
REGISTER
ADDRESS
COUNTER
OUTPUT
BUFFER
DO
MODE
DECODE
LOGIC
CLOCK
GENERATOR
Vcc
Vss
DESCRIPTION
The Microchip Technology Inc. 93LC56A/B are 2K-bit,
low-voltage serial Electrically Erasable PROMs. The
device memory is configured as x8 (93LC56A) or
x16 bits (93LC56B). Advanced CMOS technology
makes these devices ideal for low power nonvolatile
memory applications. The 93LC56A/B is available in
standard 8-pin DIP, surface mount SOIC, and TSSOP
packages. The 93LC56AX/BX are only offered in a
150-mil SOIC package.
SOIC
TSSOP
CS 1
CLK 2
DI 3
DO 4
8 Vcc
CS
7 NC
CLK
6 NC
DI
5 Vss
DO
1
2
3
4
8 VCC
NU 1
7 NC
Vcc 2
6 NC
CS 3
5 Vss CLK 4
CS 1
8 NC CLK 2
DI 3
7 Vss
DO 4
6 DO
5 DI
8 Vcc
7 NC
6 NC
5 Vss
Microwire is a registered trademark of National Semiconductor.
© 1997 Microchip Technology Inc.
Preliminary
DS21208A-page 1
1 page  
3.4 ERASE
The ERASE instruction forces all data bits of the spec-
ified address to the logical “1” state. CS is brought low
following the loading of the last address bit. This falling
edge of the CS pin initiates the self-timed programming
cycle.
The DO pin indicates the READY/BUSY status of the
device if CS is brought high after a minimum of 250 ns
low (TCSL). DO at logical “0” indicates that program-
ming is still in progress. DO at logical “1” indicates that
the register at the specified address has been erased
and the device is ready for another instruction.
FIGURE 3-2: ERASE TIMING
CS
CLK
93LC56A/B
3.5 Erase All (ERAL)
The ERAL instruction will erase the entire memory
array to the logical “1” state. The ERAL cycle is identical
to the ERASE cycle except for the different opcode. The
ERAL cycle is completely self-timed and commences at
the falling edge of the CS. Clocking of the CLK pin is not
necessary after the device has entered the ERAL cycle.
The DO pin indicates the READY/BUSY status of the
device if CS is brought high after a minimum of 250 ns
low (TCSL) and before the entire ERAL cycle is com-
plete.
TCSL
CHECK STATUS
DI
1
1
1
AN AN-1 AN-2 •••
A0
HIGH-Z
DO
FIGURE 3-3: ERAL TIMING
CS
TCSL
TSV
BUSY
TWC
TCZ
READY
HIGH-Z
CHECK STATUS
CLK
DI
1
00
10
X •••
X
HIGH-Z
DO
Guaranteed at Vcc = 4.5V to +6.0V.
TSV
BUSY
TEC
TCZ
READY
HIGH-Z
© 1997 Microchip Technology Inc.
Preliminary
DS21208A-page 5
5 Page 
93LC56A/B
93LC56A/B PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
93LC56A/B —
/P
Package:
P = Plastic DIP (300 mil Body), 8-lead
SN = Plastic SOIC (150 mil Body), 8-lead
SM = Plastic SOIC (208 mil Body), 8-lead
ST = TSSOP, 8-lead
Temperature
Range:
Blank = 0°C to +70°C
I = -40°C to +85°C
Device:
93LC56A
93LC56AT
93LC56AX
93LC56AXT
93LC56B
93LC56BT
93LC56BX
93LC56BXT
2K Microwire Serial EEPROM (x8)
2K Microwire Serial EEPROM (x8) Tape and Reel
2K Microwire Serial EEPROM (x8) in alternate pinout
(SN only)
2K Microwire Serial EEPROM (x8) in alternate
pinout, Tape and Reel (SN only)
2K Microwire Serial EEPROM (x16)
2K Microwire Serial EEPROM (x16) Tape and Reel
2K Microwire Serial EEPROM (x16) in alternate
pinout (SN only)
2K Microwire Serial EEPROM (x16) in alternate
pinout, Tape and Reel (SN only)
Sales and Support
Data Sheets
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:
1. Your local Microchip sales office.
2. The Microchip Corporate Literature Center U.S. FAX: (602) 786-7277.
3. The Microchip’s Bulletin Board, via your local CompuServe number (CompuServe membership NOT required).
© 1997 Microchip Technology Inc.
Preliminary
DS21208A-page 11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet 93LC56A.PDF ] | |
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