25LC640X-I/ST Microchip Technology Inc., 25LC640X-I/ST Datasheet

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25LC640X-I/ST

Manufacturer Part Number
25LC640X-I/ST
Description
SPI Serial EEPROM, 64 Kbit, Alternate Pinout, TSSOP8
Manufacturer
Microchip Technology Inc.
Datasheet

Specifications of 25LC640X-I/ST

Capacitance, Input
7 pF
Capacitance, Output
7 pF
Current, Input, Leakage
±1 μA
Current, Operating
1 mA (Read), 5 mA (Write)
Current, Output, Leakage
±1
Data Retention
>200 yrs.
Density
64K
Interface
SPI Bus
Memory Type
Serial EEPROM
Organization
8192×8
Package Type
TSSOP
Temperature, Operating
-40 to +85 °C
Time, Access
230 ns
Time, Address Hold
250
Time, Address Setup
250
Time, Fall
2 μs
Time, Rise
2 μs
Voltage, Esd
>4 kV
Voltage, Input, High
3.5 V
Voltage, Input, Low
0.5 V
Voltage, Output, High
2 V
Voltage, Output, Low
0.4 V
Voltage, Supply
2.5 to 5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part Electrostatic Device

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Part Number
Manufacturer
Quantity
Price
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MCP
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Manufacturer:
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Device Selection Table
Features:
• Low-Power CMOS Technology
• 8192 x 8 Bit Organization
• 32 Byte Page
• Write Cycle Time: 5 ms max.
• Self-Timed Erase and Write Cycles
• Block Write Protection
• Built-in Write Protection
• Sequential Read
• High Reliability
• 8-pin PDIP, SOIC and TSSOP Packages
• Temperature Ranges Supported:
Package Types
*25XX640 is used in this document as a generic part number for the 25AA640/25LC640 devices.
© 2008 Microchip Technology Inc.
25AA640
25LC640
25LC640
- Write current: 3 mA, typical
- Read current: 500
- Standby current: 500 nA, typical
- Protect none, 1/4, 1/2 or all of array
- Power on/off data protection circuitry
- Write enable latch
- Write-protect pin
- Data retention: > 200 years
- ESD protection: > 4000V
- Industrial (I): -40°C to +85°C
- Automotive (E): -40°C to +125°C
Number
Part
1.8-5.5V
2.5-5.5V
4.5-5.5V
Range
V
CC
V
WP
SO
CS
SS
μ
A, typical
1
2
3
4
Frequency
PDIP/SOIC
Max Clock
64K SPI Bus Serial EEPROM
3/2.5 MHz
1 MHz
2 MHz
8
7
6
5
25AA640/25LC640
V
HOLD
SCK
SI
Ranges
CC
Temp
I, E
I
I
HOLD
Description:
The Microchip Technology Inc. 25AA640/25LC640
(25XX640
PROM [EEPROM]. 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.
Block Diagram
V
HOLD
SO
CS
CC
SCK
WP
SO
CS
SI
1
2
3
4
I/O Control
STATUS
Not recommended for new designs –
Please use 25AA640A or 25LC640A.
*
Register
) is a 64 Kbit Serial Electrically Erasable
Logic
TSSOP
V
V
CC
SS
Memory
Control
Logic
8
7
6
5
SCK
SI
V
WP
SS
XDEC
DS21223H-page 1
Sense Amp.
R/W Control
Y Decoder
HV Generator
EEPROM
Latches
Array
Page

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25LC640X-I/ST Summary of contents

Page 1

... Microchip Technology Inc. Not recommended for new designs – Please use 25AA640A or 25LC640A. 25AA640/25LC640 Description: Temp The Microchip Technology Inc. 25AA640/25LC640 Ranges * (25XX640 ) Kbit Serial Electrically Erasable PROM [EEPROM]. The memory is accessed via a I ...

Page 2

... V = < 2. -400 μ OUT 5.0V (Note 1) = 5.5V 3.0 MHz; CLK = 2.5V 2.0 MHz; CLK = 5.5V = 2.5V = 5.5V, Inputs tied 2.5V, Inputs tied © 2008 Microchip Technology Inc. ...

Page 3

... CLK A 3: This parameter is not tested but established by characterization. For endurance estimates in a specific application, please consult the Total Endurance™ Model which can be obtained from Microchip’s web site © 2008 Microchip Technology Inc. 25AA640/25LC640 Industrial (I -40°C to +85°C ...

Page 4

... Microchip Technology Inc. 25AA640/25LC640 PP %RG\ >76623@ φ I DS21223H-page 17 ...

Page 5

... Industrial Temp., SOIC package b) 25AA640T-I/SN: Tape and Reel, Industrial Temp., SOIC package c) 25AA640X-I/ST: Alternate Pinout Industrial Temp., TSSOP package d) 25LC640-I/SN: Industrial Temp., SOIC package e) 25LC640T-I/SN: Tape and Reel, Industrial Temp., SOIC package f) 25LC640X-I/ST: Alternate Pinout, Industrial Temp., TSSOP package . DS21223H-page 21 ...

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