23K256 MICROCHIP [Microchip Technology], 23K256 Datasheet

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23K256

Manufacturer Part Number
23K256
Description
256K SPI Bus Low-Power Serial SRAM
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet

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Company
Part Number
Manufacturer
Quantity
Price
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MICROCHIP
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MCP
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MIC
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20 000
Device Selection Table
Features:
• Max. Clock 20 MHz
• Low-Power CMOS Technology:
• 32,768 x 8-bit Organization
• 32-Byte Page
• HOLD pin
• Flexible Operating modes:
• Sequential Read/Write
• High Reliability
• Temperature Ranges Supported:
• Pb-Free and RoHS Compliant, Halogen Free
Pin Function Table
 2010 Microchip Technology Inc.
CS
SO
V
SI
SCK
HOLD
V
- Read Current: 3 mA at 1 MHz
- Standby Current: 4 A Max. at +85°C
- Byte read and write
- Page mode (32 Byte Page)
- Sequential mode
- Industrial (I):
- Automotive (E):
SS
CC
Part Number
Name
23K256
23A256
Chip Select Input
Serial Data Output
Ground
Serial Data Input
Serial Clock Input
Hold Input
Supply Voltage
256K SPI Bus Low-Power Serial SRAM
-40C
-40C
V
1.5-1.95V
CC
2.7-3.6V
Function
Range
to
to
+125C
+85C
Page Size
32 Byte
32 Byte
23A256/23K256
Description:
The Microchip Technology Inc. 23X256 are 256 Kbit
Serial SRAM devices. The memory is accessed via a
simple Serial Peripheral Interface (SPI) compatible
serial bus. The bus signals required are a clock input
(SCK) plus separate data in (SI) and data out (SO)
lines. Access to the device is controlled through a Chip
Select (CS) input.
Communication to the device can be paused via the
hold pin (HOLD). While the device is paused,
transitions on its inputs will be ignored, with the
exception of Chip Select, allowing the host to service
higher priority interrupts.
The 23X256 is available in standard packages
including 8-lead PDIP and SOIC, and advanced
packaging including 8-lead TSSOP.
Package Types (not to scale)
Temp. Ranges
I, E
I
V
CS
SO
NC
SS
PDIP/SOIC/TSSOP
1
2
3
4
(P, SN, ST)
8
7
6
5
Packages
P, SN, ST
P, SN, ST
V
HOLD
SCK
SI
DS22100E-page 1
CC

Related parts for 23K256

23K256 Summary of contents

Page 1

... Serial Data Input SCK Serial Clock Input HOLD Hold Input V Supply Voltage CC  2010 Microchip Technology Inc. 23A256/23K256 Page Size Temp. Ranges 32 Byte Byte I Description: The Microchip Technology Inc. 23X256 are 256 Kbit Serial SRAM devices. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus ...

Page 2

... V can be lowered without losing RAM data. This parameter is periodically +0.3V CC Test Conditions 23A256 (I-Temp) 23K256 (I,E-Temp -400  OUT MHz ...

Page 3

TABLE 1-2: AC CHARACTERISTICS AC CHARACTERISTICS Param. Sym. Characteristic No Clock frequency CLK setup time CSS hold time CSH disable time CSD 5 Tsu Data setup time 6 T ...

Page 4

TABLE 1-2: AC CHARACTERISTICS (CONTINUED) AC CHARACTERISTICS Param. Sym. Characteristic No Output disable time DIS 15 T HOLD setup time HOLD hold time HOLD low to output High ...

Page 5

FIGURE 1-1: HOLD TIMING CS 15 SCK HOLD FIGURE 1-2: SERIAL INPUT TIMING CS 2 SCK MSB in SO FIGURE 1-3: SERIAL OUTPUT ...

Page 6

... Figure Page Operation – is selected when bits 7 and 6 in the STATUS register are set to 10. The 23A256/23K256 has 1024 pages of 32 Bytes. In this mode, the read and write operations are limited to within the addressed page (the address is automatically incremented internally). If the ...

Page 7

... SI High-Impedance SO  2010 Microchip Technology Inc. Description Read data from memory array beginning at selected address Write data to memory array beginning at selected address Read STATUS register Write STATUS register 16-bit Address ...

Page 8

FIGURE 2-3: PAGE READ SEQUENCE SCK Instruction High Impedance SCK SI Page X, ...

Page 9

FIGURE 2-5: SEQUENTIAL READ SEQUENCE SCK Instruction SCK SI Page X, Word SCK ...

Page 10

FIGURE 2-6: SEQUENTIAL WRITE SEQUENCE SCK Instruction SCK Data Byte ...

Page 11

Read Status Register Instruction (RDSR) The Read Status Register instruction (RDSR) provides access to the STATUS register. The STATUS register may be read at any time. The STATUS register is formatted as follows: TABLE 2-2: STATUS REGISTER 7 6 ...

Page 12

Write Status Register Instruction (WRSR) The Write Status Register instruction (WRSR) allows the user to write to the bits in the STATUS register as shown in Table 2-2. This allows for setting of the Device operating mode. Several ...

Page 13

PIN DESCRIPTIONS The descriptions of the pins are listed in TABLE 3-1: PIN FUNCTION TABLE PDIP/SOIC Name Function TSSOP CS 1 Chip Select Input SO 2 Serial Data Output V 4 Ground Serial Data Input SCK ...

Page 14

... In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information. DS22100E-page 14 Example: 23K256 I/P e 1L7 3 0528 Example: 23K256I SN e 0528 3 1L7 Example: K256 I837 1L7  2010 Microchip Technology Inc. ...

Page 15

PLO %RG\ >3',3@ 1RWH N NOTE 1RWHV  2010 Microchip Technology Inc 23X256 c DS22100E-page 15 ...

Page 16

Note: DS22100E-page 16  2010 Microchip Technology Inc. ...

Page 17

Note:  2010 Microchip Technology Inc. 23X256 DS22100E-page 17 ...

Page 18

PP %RG\ >62,&@ 1RWH DS22100E-page 18  2010 Microchip Technology Inc. ...

Page 19

PP %RG\ >76623@ 1RWH NOTE 1RWHV  2010 Microchip Technology Inc 23X256 φ L DS22100E-page 19 ...

Page 20

Note: For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging DS22100E-page 20  2010 Microchip Technology Inc. ...

Page 21

APPENDIX A: REVISION HISTORY Revision A (11/2008) Original Release. Revision B (12/2008) Updates; Table 1-1, add Param. D011. Revision C (01/2009) Revised Section 2.5: Added a paragraph. Revision D (04/2009) Removed Preliminary status; Revised Current; Revised Table 1-1, Param. No. ...

Page 22

NOTES: DS22100E-page 22  2010 Microchip Technology Inc. ...

Page 23

... To register, access the Microchip web site at www.microchip.com, click on Customer Change Notification and follow the registration instructions.  2010 Microchip Technology Inc. 23A256/23K256 CUSTOMER SUPPORT Users of Microchip products can receive assistance through several channels: • Distributor or Representative • ...

Page 24

... City / State / ZIP / Country Telephone: (_______) _________ - _________ Application (optional): Would you like a reply? Y 23A256/23K256 Device: Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs you find the organization of this document easy to follow? If not, why? 4 ...

Page 25

... Microchip Technology Inc. X /XX Examples: Package 23A256/23K256 . 23K256-I/ST = 256 Kbit, 3.6V Serial SRAM, Industrial temp., TSSOP package 23A256T-I/SN = 256 Kbit, 1.8V Serial SRAM, Industrial temp., Tape & Reel, SOIC package 23K256-E/ST = 256 Kbit, 3.6V Serial SRAM, Automotive temp., TSSOP package DS22100E-page 25 ...

Page 26

... NOTES: DS22100E-page 26  2010 Microchip Technology Inc. ...

Page 27

... India. The Company’s quality system processes and procedures are for its PIC MCUs and dsPIC ® devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. logo, MPLAB, PIC, PICmicro, PICSTART, ...

Page 28

Worldwide Sales and Service AMERICAS ASIA/PACIFIC Corporate Office Asia Pacific Office 2355 West Chandler Blvd. Suites 3707-14, 37th Floor Chandler, AZ 85224-6199 Tower 6, The Gateway Tel: 480-792-7200 Harbour City, Kowloon Fax: 480-792-7277 Hong Kong Technical Support: Tel: 852-2401-1200 http://support.microchip.com ...

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