AT93C46B-10PC-2.5 ATMEL [ATMEL Corporation], AT93C46B-10PC-2.5 Datasheet

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AT93C46B-10PC-2.5

Manufacturer Part Number
AT93C46B-10PC-2.5
Description
3-Wire Serial E2PROMs
Manufacturer
ATMEL [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-10PC-2.5 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

... Standard Device (4.5V to 5.5V) -2.7 Low Voltage (2.7V to 5.5V) -2.5 Low Voltage (2.5V to 5.5V) AT93C46B 10 I (max MAX ( A) (kHz) 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 ...

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