x25170 IC MICROSYSTEMS, x25170 Datasheet

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x25170

Manufacturer Part Number
x25170
Description
Spi Serial E 2 Prom With Block Lock ? Protection
Manufacturer
IC MICROSYSTEMS
Datasheet

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Direct Write
16K
FEATURES
•5MHz Clock Rate
•SPI Modes (0,0 & 1,1)
•2K X 8 Bits
•Low Power CMOS
•2.5V To 5.5V Power Supply
•Block Lock Protection
•Self-Timed Write Cycle
•High Reliability
•8-Lead PDlP Package
•8-Lead SOIC Package
• 14-Lead TSSOP Package
BLOCK DIAGRAM
© Xicor, Inc. 2000 Patents Pending
9900-5004.9 5/26/00 EP
Built-In Inadvertent Write Protection
—Protect 1/4, 1/2 or all of E
—32 byte page mode
—<1µA standby current
—<5mA active current
—Power-up/power-down protection circuitry
—Write enable latch
—Write protect pin
—5ms write cycle time (typical)
—Endurance: 100,000 cycles
—Data retention: 100 Years
—ESD protection: 2000V on all pins
This X25170 device has been acquired by
IC MICROSYSTEMS from Xicor, Inc.
and Block Lock
HOLD
SCK
SO
WP
SI
CS
Protection is a trademark of Xicor, Inc.
SPI Serial E
Command
2
PROM array
Register
Decode
Control
Control
Timing
Status
Write
Logic
Logic
and
and
2
PROM with Block Lock
Protect
Logic
Write
X25170
DESCRIPTION
The X25170 is a CMOS 16384-bit serial E2PROM,
internally organized as 2K x 8. The X25170 features a
Serial Peripheral Interface (SPI) and software protocol,
allowing 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
controlled through a chip select (CS) input, allowing any
number of devices to share the same bus.
The X25170 also features two additional inputs that
provide the end user with added flexibility. By asserting
the HOLD input, the X25170 will ignore transitions on its
inputs, thus allowing the host to service higher prior-
ity interrupts. The WP input can be used as a hardwire input
to the X25170 (disabling all write attempts to the
status register), thus providing a mechanism for limiting end
user capability of altering 0, 1/4, 1/2 or all of the memory.
The X25170 utilizes Xicor’s proprietary Direct Write
providing a minimum endurance of 100,000 cycles and a
minimum data retention of 100 years.
X Decode
Logic
Protection
32
Characteristics subject to change without notice.
16
16
32
Data Register
Y Decode
2K Byte
32 X 256
16 X 256
16 X 256
ICmic
IC MICROSYSTEMS
Array
8
2K x 8 Bit
1 of 15
cell,
TM

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x25170 Summary of contents

Page 1

... The X25170 also features two additional inputs that provide the end user with added flexibility. By asserting the HOLD input, the X25170 will ignore transitions on its inputs, thus allowing the host to service higher prior- ity interrupts. The WP input can be used as a hardwire input ...

Page 2

... When WP is held HIGH, all functions, including nonvolatile writes operate normally. WP going LOW while CS is still LOW will interrupt a write to the X25170 status reg- ister. If the internal write cycle has already been initi- ated, WP going LOW will have no effect on a write. ...

Page 3

... WEL and WIP are read-only and automatically set by other operations. The Write-In-Process (WIP) bit indicates whether the X25170 is busy with a write operation. When set to a “1”, a write is in progress, when set to a “0”, no write is in progress. During a write, all other bits are set to “1”. ...

Page 4

... X25170 Write-Protect Enable The Write-Protect-Enable (WPEN) bit is available for the X25170 as a nonvolatile enable bit for the WP pin. The Write Protect (WP) pin and the nonvolatile Write Protect Enable (WPEN) bit in the Status Register con- trol the programmable hardware write protect feature. ...

Page 5

... SI High Impedance SO Write Sequence Prior to any attempt to write data into the X25170, the “write enable” latch must first be set by issuing the WREN instruction (See Figure 3 first taken LOW, then the WREN instruction is clocked into the X25170. After all eight bits of the instruction are trans- mitted, CS must then be taken HIGH ...

Page 6

... X25170 Figure 3. Write Enable Latch Sequence CS SCK SI SO For the write operation (byte or page write com- pleted, CS can only be brought HIGH after bit 0 of data byte N is clocked in brought HIGH at any other time the write operation will not be completed. Refer to Figure 4 ...

Page 7

... SCK SI High Impedance SO Operational Notes The X25170 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. – SO pin is high impedance. – The “write enable” latch is reset. ...

Page 8

... Exposure to absolute maximum rating con- ditions for extended periods may affect device reliability. Max. Supply Voltage +70°C X25170 +85°C X25170-2.5 +125°C Limits Min. Max. Units ...

Page 9

... X25170 CAPACITANCE T = +25° 1MHz Symbol (2) C Output capacitance (SO) OUT (2) C Input capacitance (SCK, SI, CS, WP, HOLD) IN Notes: (1) V min. and V max. are for reference only and are not tested (2) This parameter is periodically sampled and not 100% tested. (3) t and t ...

Page 10

... X25170 Data Output Timing Symbol f Clock frequency SCK t Output disable time DIS t Output valid from clock LOW V t Output hold time HO (4) t Output rise time RO (4) t Output fall time FO (4) t HOLD HIGH to output in low Z LZ (4) t HOLD LOW to output in high Z HZ Notes: (4) This parameter is periodically sampled and not 100% tested ...

Page 11

... X25170 Hold Timing CS SCK SO SI HOLD SYMBOL TABLE WAVEFORM INPUTS OUTPUTS Must be Will be steady steady May change Will change from LOW from LOW to HIGH May change Will change from HIGH from HIGH to LOW to LOW Don’t Care: Changing: Changes State Not ...

Page 12

... X25170 PACKAGING INFORMATION Half Shoulder Width On All End Pins Optional 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 (10.92) 0.360 (9.14) Pin 1 Index Pin 1 0.300 (7.62) Ref. Seating Plane 0.150 (3.81) 0.125 (3.18) 0.110 (2.79) ...

Page 13

... X25170 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 P ARENTHESES IN MILLIMETERS) Pin 1 0.014 (0.35) 0.019 (0.49) 0.188 (4.78) 0.197 (5.00) (4X) 7° 0.050 (1.27) X 45° 0.0075 (0.19) 0.010 (0.25) 0.150 (3.80) ...

Page 14

... X25170 PACKAGING INFORMATION 0° - 8° See Detail “A” NOTE: ALL DIMENSIONS IN INCHES (IN P ARENTHESES IN MILLIMETERS) 14-Lead Plastic, TSSOP, Package Type V .025 (.65) BSC .169 (4.3) .177 (4.5) .193 (4.9) .200 (5.1) .0075 (.19) .002 (.05) .0118 (.30) .006 (.15) .010 (.25) .019 (.50) .029 (.75) Detail A (20X) .252 (6.4) BSC .047 (1.20) Gage Plane Seating Plane ...

Page 15

... A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness. X25170 ...

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