x25040sm-3 Intersil Corporation, x25040sm-3 Datasheet

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x25040sm-3

Manufacturer Part Number
x25040sm-3
Description
Spi Serial E2prom With Block Locktm Protection
Manufacturer
Intersil Corporation
Datasheet
X25040
4K
FEATURES
FUNCTIONAL DIAGRAM
Direct Write™ and Block Lock™ Protection is a trademark of Xicor, Inc.
©Xicor, Inc. 1994, 1995, 1996 Patents Pending
6451-3.6 6/10/96 T5/C1/D0 NS
1MHz Clock Rate
SPI Modes (0,0 & 1,1)
512 X 8 Bits
—4 Byte Page Mode
Low Power CMOS
—150 A Standby Current
—3mA Active Current
2.7V To 5.5V Power Supply
Block Lock Protection
—Protect 1/4, 1/2 or all of E
Built-in Inadvertent Write Protection
—Power-Up/Power-Down protection circuitry
—Write Latch
—Write Protect Pin
Self-Timed Write Cycle
—5ms Write Cycle Time (Typical)
High Reliability
—Endurance: 100,000 cycles per byte
—Data Retention: 100 Years
—ESD protection: 2000V on all pins
8-Lead PDlP Package
8-Lead SOIC Package
AN9 • AN18 • AN31 • AN37 • AN40
A V A I L A B L E
HOLD
A
SCK
WP
SO
PPLICATION
CS
SI
SPI Serial E
N
COMMAND
OTES
REGISTER
CONTROL
CONTROL
DECODE
STATUS
TIMING
WRITE
LOGIC
LOGIC
AND
AND
2
PROM Array
2
PROM with Block Lock
PROTECT
WRITE
LOGIC
X25040
1
DESCRIPTION
The X25040 is a CMOS 4096-bit serial E
nally organized as 512 x 8. The X25040 features a Serial
Peripheral Interface (SPI) and software protocol allow-
ing operation on a simple three-wire bus. The bus
signals are a clock input (SCK) plus separate data in (SI)
and data out (SO) lines. Access to the device is con-
trolled through a chip select (CS) input, allowing any
number of devices to share the same bus.
The X25040 also features two additional inputs that
provide the end user with added flexibility. By asserting
the HOLD input, the X25040 will ignore transitions on its
inputs, thus allowing the host to service higher priority
interrupts. The WP input can be used as a hardwire input
to the X25040 disabling all write attempts, thus providing
a mechanism for limiting end user capability of altering
the memory.
The X25040 utilizes Xicor’s proprietary Direct Write™
cell, providing a minimum endurance of 100,000 cycles
per byte and a minimum data retention of 100 years.
X DECODE
LOGIC
TM
Protection
32
32
64
4
Characteristics subject to change without notice
DATA REGISTER
Y DECODE
512 BYTE
ARRAY
32 X 32
32 X 32
64 X 32
8
512 x 8 Bit
2
PROM, inter-
6451 FHD F01

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x25040sm-3 Summary of contents

Page 1

A N PPLICATION OTES X25040 AN9 • AN18 • AN31 • AN37 • AN40 4K SPI Serial E FEATURES • 1MHz Clock Rate • SPI Modes (0,0 & 1,1) • 512 ...

Page 2

X25040 PIN DESCRIPTIONS Serial Output (SO push/pull serial data output pin. During a read cycle, data is shifted out on this pin. Data is clocked out by the falling edge of the serial clock. Serial Input (SI) ...

Page 3

X25040 PRINCIPLES OF OPERATION 2 The X25040 is a 512 PROM designed to interface directly with the synchronous serial peripheral interface (SPI) of many popular microcontroller families. The X25040 contains an 8-bit instruction register accessed ...

Page 4

X25040 Clock and Data Timing Data input on the SI line is latched on the rising edge of SCK. Data is output on the SO line by the falling edge of SCK. Read Sequence 2 PROM memory array ...

Page 5

X25040 Operational Notes The X25040 powers-up in the following state: • The device is in the low power standby state. • A HIGH to LOW transition required to enter an active state and receive an instruction. • ...

Page 6

X25040 Figure 3. Write Enable Latch Sequence CS SCK SI SO Figure 4. Byte Write Operation Sequence SCK INSTRUCTION SI 8 9TH BIT OF ADDRESS HIGH IMPEDANCE ...

Page 7

X25040 Figure 5. Page Write Operation Sequence SCK INSTRUCTION SI 8 9TH BIT OF ADDRESS SCK DATA ...

Page 8

X25040 ABSOLUTE MAXIMUM RATINGS* Temperature under Bias .................. – +135 C Storage Temperature ....................... – +150 C Voltage on any Pin with Respect to V D.C. Output Current ............................................. 5mA Lead Temperature (Soldering, 10 seconds) .............................. ...

Page 9

X25040 EQUIVALENT A.C. LOAD CIRCUIT 2.16K OUTPUT 3.07K A.C. CHARACTERISTICS (Over recommended operating conditions, unless otherwise specified) Data Input Timing Symbol Parameter f Clock Frequency SCK t Cycle Time CYC CS Lead Time t LEAD CS ...

Page 10

X25040 Serial Output Timing CS SCK MSB OUT ADDR SI LSB IN Serial Input Timing CS t LEAD SCK MSB IN HIGH IMPEDANCE CYC MSB–1 OUT t t ...

Page 11

X25040 Hold Timing CS SCK SO SI HOLD 6451 FHD F11 ...

Page 12

X25040 PACKAGING INFORMATION HALF SHOULDER WIDTH ON ALL END PINS OPTIONAL 0.015 (0.38) TYP. 0.010 (0.25) NOTE: 1. ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 2. PACKAGE DIMENSIONS EXCLUDE MOLDING FLASH 8-LEAD PLASTIC DUAL IN-LINE PACKAGE TYPE P 0.430 ...

Page 13

X25040 PACKAGING INFORMATION 8-LEAD PLASTIC SMALL OUTLINE GULL WING PACKAGE TYPE S PIN 1 INDEX 0.010 (0.25) 0.020 (0.50) 0 – 8 0.016 (0.410) 0.037 (0.937) NOTE: ALL DIMENSIONS IN INCHES (IN PARENTHESES IN MILLIMETERS) 0.150 (3.80) 0.158 (4.00) PIN ...

Page 14

X25040 ORDERING INFORMATION Device Part Mark Convention LIMITED WARRANTY Devices sold by Xicor, Inc. are covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Xicor, Inc. makes no warranty, express, statutory, implied ...

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