XL9020
EXEL Microelectronics, Inc.
2,048-Bit Serial Electrically Erasable PROM
2.7 to 5.5 Volt Operation
FEATURES
PIN CONFIGURATIONS
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•
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1 MHz Clock Rate
Plastic Dual-in-line
“P” Package
Extended Temperature Range: -40°C to +85°C
1
2
3
4
8
7
6
5
CS
SK
DI
VCC
R/B
WC
Low Power Consumption
— Active current 1.5 mA
— Standby current 2µA
2.7 to 5.5 volt operation (both READ and
WRITE)
•
DO
GND
•
•
4-Wire Bus Interface
Hardware & Software Write Protection
— Defaults to disabled state at power up
— Software instructions for WRITE-enable/
disable
EIAJ Small Outline
“F” Package
•
•
Internally Organized as 128 x 16 bits
1
2
3
4
8
7
6
5
WC
GND
DO
R/B
VCC
Versatile, Easy-to-Use Interface
— READY/BUSY status signal
— Automatic write cycle time-out
Advanced CMOS E2PROM Technology
CS
SK
DI
•
•
High Reliability
D0018 ILL A01.2
— Endurance: 100,000 cycles per byte
— Data retention: 100 years
•
8-Pin PDIP or SOIC Packages
PIN NAMES
CS
SK
DI
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Write Control
READY/BUSY Output
Power Supply
DO
GND
WC
R/B
VCC
OVERVIEW
The XL9020 is a cost effective 2,048-bit, nonvolatile, devicewhenpolledduringtheWRITEoperation.Thedata
serial E2PROM designed to directly connect with serial output pin (DO) also indicates the status of the device
interface. It is fabricated using EXEL's advanced CMOS during self-timed nonvolatile programming cycle. To pro-
E2PROM technology. The XL9020 provides external tect against inadvertent writes, the WRITE instruction is
read/write memory arranged as 128 registers of 16 bits accepted only while the chip is in the write enabled state.
each. Four 8-bit instructions control the operation of the After the initiation of the write cycle, if Chip Select (CS) is
device, which include read, write, write enable and write brought into LOW state, while SK is low, the DO pin will
disable. The READY/BUSY pin indicates the status of the indicate the READY/BUSY status of the chip.
D0018 5/96
DVPTD 6931-05
EXEL Microelectronics, Inc.
2150 Commerce Drive
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San Jose, CA 95131
Phone 408 432-0500
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Fax 408 432-8710 • Internet www.exel.com