at93c46b-10si-2.7 ATMEL Corporation, at93c46b-10si-2.7 Datasheet

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at93c46b-10si-2.7

Manufacturer Part Number
at93c46b-10si-2.7
Description
3-wire Serial E2proms
Manufacturer
ATMEL Corporation
Datasheet
Features
Description
The AT93C46B provides 1024 bits of serial electrically erasable programmable read
only memory (EEPROM) organized as 64 words of 16 bits each. The device is opti-
mized for use in many industrial and commercial applications where low power and
low voltage operation are essential. The AT93C46B is available in space saving 8-pin
PDIP and 8-pin JEDEC packages.
The AT93C46B is enabled through the Chip Select pin (CS), and accessed via a 3-
wire serial interface consisting of Data Input (DI), Data Output (DO), and Shift Clock
(SK). Upon receiving a READ instruction at DI, the address is decoded and the data is
clocked out serially on the data output pin DO. The WRITE cycle is completely self-
timed and no separate ERASE cycle is required before WRITE. The WRITE cycle is
only enabled when the part is in the ERASE/WRITE ENABLE state. When CS is
brought “high” following the initiation of a WRITE cycle, the DO pin outputs the
READY/BUSY status of the part.
The AT93C46B is available in 4.5V to 5.5V, 2.7V to 5.5V, and 2.5V to 5.5V versions.
Pin Configuration
Pin Name
CS
SK
DI
DO
GND
V
NC
x16 Organization Utilizing “No Connects” for Pins 6 and 7
Low Voltage and Standard Voltage Operation
3-Wire Serial Interface
2 MHz Clock Rate (5V) Compatibility
Self-Timed Write Cycle (10 ms max)
High Reliability
Automotive Grade and Extended Temperature Devices Available
8-Pin PDIP and JEDEC SOIC Packages
CC
– 5.0 (V
– 2.7 (V
– 2.5 (V
– Endurance: 1 Million Cycles
– Data Retention: 100 Years
CC
CC
CC
= 4.5V to 5.5V)
= 2.7V to 5.5V)
= 2.5V to 5.5V)
Function
Chip Select
Serial Data Clock
Serial Data Input
Serial Data Output
Ground
Power Supply
No Connect
DO
CS
SO
SK
CS
SK
DI
DI
1
2
3
4
1
2
3
4
8-Pin SOIC
8-Pin PDIP
8
7
6
5
8
7
6
5
VCC
NC
NC
GND
VCC
NC
NC
GND
3-Wire
Serial
E
1K (64 x 16)
AT93C46B
2
PROMs
0917A-A–11/97
1

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at93c46b-10si-2.7 Summary of contents

Page 1

... ERASE cycle is required before WRITE. The WRITE cycle is only enabled when the part is in the ERASE/WRITE ENABLE state. When CS is brought “high” following the initiation of a WRITE cycle, the DO pin outputs the READY/BUSY status of the part. The AT93C46B is available in 4.5V to 5.5V, 2.7V to 5.5V, and 2.5V to 5.5V versions. Pin Configuration Pin Name Function ...

Page 2

... Storage Temperature............................- +150 C Voltage on Any Pin with Respect to Ground........................... -1.0V to +7.0V Maximum Operating Voltage .................................6.25V DC Output Current ..............................................5.0 mA Block Diagram AT93C46B 2 *NOTICE: Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent dam- age to the device. This is a stress rating only and ...

Page 3

Pin Capacitance Applicable over recommended operating range from T Test Conditions C Output Capacitance (DO) OUT C Input Capacitance (CS, SK, DI) IN Note: 1. This parameter is characterized and is not 100% tested. DC Characteristics Applicable over recommended ...

Page 4

... CS Hold Time CSH t DI Hold Time DIH t Output Delay to ‘1’ PD1 t Output Delay to ‘0’ PD0 Status Valid High Impedance DF t Write Cycle Time WP Endurance AT93C46B 4 = -40° 85° +2. 5.5V Test Condition 4.5V V 5.5V CC 2.7V V 5.5V CC 2.5V V 5. ...

Page 5

... Instruction Set for the AT93C46B Instruction SB Op Code READ 1 EWEN 1 ERASE 1 WRITE 1 ERAL 1 WRAL 1 EWDS 1 Address (x16) Comments Reads data stored in memory, at specified address 11XXXX Write enable must precede all programming modes Erase memory location Writes memory location A ...

Page 6

... Functional Description The AT93C46B is accessed via a simple and versatile three-wire serial communication interface. Device opera- tion is controlled by seven instructions issued by the host processor. A valid instruction starts with a rising edge of CS and consists of a Start Bit (logic ‘1’) followed by the appro- priate Op Code and the desired memory Address location ...

Page 7

... Organization Key for Timing Diagrams I READ Timing EWEN Timing (1) EWDS Timing Note: 1. Requires a minimum of nine clock cycles. AT93C46B (x16 ...

Page 8

... WRITE Timing (1)(2) WRAL Timing Notes: 1. Valid only 4.5V to 5.5V Requires a minimum of nine clock cycles. ERASE Timing AT93C46B 8 ...

Page 9

TERAL Timing Note: 1. Valid only 4.5V to 5.5V ...

Page 10

... Ordering Code AT93C46B-10PC 50.0 2000 AT93C46B-10SC AT93C46B-10PC-2.7 20.0 1000 AT93C46B-10SC-2.7 AT93C46B-10PC-2.5 20.0 500 AT93C46B-10SC-2.5 AT93C46B-10PI 50.0 2000 AT93C46B-10SI AT93C46B-10PI-2.7 20.0 1000 AT93C46B-10SI-2.7 AT93C46B-10PI-2.5 20.0 500 AT93C46B-10SI-2.5 Package Type Options Package Operation Range 8P3 Commercial 8S1 ( 8P3 Commercial 8S1 ( 8P3 Commercial 8S1 ( ...

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