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93C56BESN Schematic ( PDF Datasheet ) - Microchip Technology

Teilenummer 93C56BESN
Beschreibung 2K 5.0V Automotive Temperature Microwire Serial EEPROM
Hersteller Microchip Technology
Logo Microchip Technology Logo 




Gesamt 12 Seiten
93C56BESN Datasheet, Funktion
M
93C56A/B
2K 5.0V Automotive Temperature Microwire® Serial EEPROM
FEATURES
• Single supply 5.0V operation
• Low power CMOS technology
- 1 mA active current (typical)
- 1 µA standby current (maximum)
• 256 x 8 bit organization (93C56A)
• 128 x 16 bit organization (93C56B)
• 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
• 100,000 E/W cycles guaranteed
• Data retention > 200 years
• 8-pin PDIP and SOIC packages
• Available for the following temperature ranges:
- Automotive (E):
-40°C to +125°C
DESCRIPTION
The Microchip Technology Inc. 93C56A/B is a 2K-bit,
low-voltage serial Electrically Erasable PROM. The
device memory is configured as 256 x 8 bits (93C56A)
or 128 x 16 bits (93C56B). Advanced CMOS technol-
ogy makes this device ideal for low-power, nonvolatile
memory applications. The 93C56A/B is available in
standard 8-pin DIP and surface mount SOIC packages.
This device is only recommeded for 5V automotive
temperature applications. For all commercial and
industrial applications, the 93LC56A/B is recom-
mended.
PACKAGE TYPE
PDIP
CS
VCC
1
CLK 2
DI 3
DO 4
8
7 NC
6 NC
5 VSS
SOIC
CS
CLK
DI
DO
1
2
3
4
8 VCC
7 NC
6 NC
5 VSS
BLOCK DIAGRAM
MEMORY
ARRAY
ADDRESS
DECODER
ADDRESS
COUNTER
DI
CS
CLK
DATA
REGISTER
MEMORY
DECODE
LOGIC
CLOCK
GENERATOR
OUTPUT
BUFFER
DO
VCC
VSS
Microwire is a registered trademark of National Semiconductor.
© 1998 Microchip Technology Inc.
Preliminary
DS21206B-page 1






93C56BESN Datasheet, Funktion
93C56A/B
3.6 ERASE/WRITE Disable and Enable
(EWDS/EWEN)
The device powers up in the ERASE/WRITE Disable
(EWDS) state. All programming modes must be pre-
ceded by an ERASE/WRITE Enable (EWEN) instruc-
tion. Once the EWEN instruction is executed,
programming remains enabled until an EWDS instruc-
tion is executed or VCC is removed from the device. To
protect against accidental data disturbance, the EWDS
instruction can be used to disable all ERASE/WRITE
functions and should follow all programming opera-
tions. Execution of a READ instruction is independent
of both the EWEN and EWDS instructions.
FIGURE 3-4: READ TIMING
CS
3.7 READ
The READ instruction outputs the serial data of the
addressed memory location on the DO pin. A dummy
zero bit precedes the 8-bit (93C56A) or 16-bit
(93C56B) output string. The output data bits will toggle
on the rising edge of the CLK and are stable after the
specified time delay (TPD). Sequential read is possible
when CS is held high. The memory data will automati-
cally cycle to the next register and output sequentially.
CLK
DI
DO
1 1 0 An ••• A0
HIGH-Z
0 Dx ••• D0 Dx ••• D0 Dx ••• D0
FIGURE 3-5: EWDS TIMING
CS
CLK
TCSL
DI
1 00
00
X
FIGURE 3-6: EWEN TIMING
CS
CLK
•••
X
TCSL
DI 1 0 0 1 1 X ••• X
DS21206B-page 6
Preliminary
© 1998 Microchip Technology Inc.

6 Page









93C56BESN pdf, datenblatt
M
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12/30/97
All rights reserved. © 1998, Microchip Technology Incorporated, USA. 1/98
Printed on recycled paper.
Information contained in this publication regarding device applications and the like is intended for suggestion only and may be superseded by updates. No representation or warranty is given and no
liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use
or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or
otherwise, under any intellectual property rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other
trademarks mentioned herein are the property of their respective companies.
DS21206B-page 12
Preliminary
© 1998 Microchip Technology Inc.

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