ATMEL AT93C46A-10TI-2.5, AT93C46A-10TI, AT93C46A-10TC-2.7, AT93C46A-10TC-2.5, AT93C46A-10TC Datasheet
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Features
•Low-Voltage and Standard-Voltage Operation
–5.0 (V CC = 4.5V to 5.5V)
–2.7 (V CC = 2.7V to 5.5V)
–2.5 (V CC = 2.5V to 5.5V)
•3-Wire Serial Interface
•2 MHz Clock Rate (5V) Compatibility
•Self-Timed Write Cycle (10 ms max)
•High Reliability
–Endurance: 1 Million Write Cycles
–Data Retention: 100 Years
–ESD Protection: > 4,000V
•Automotive Grade and Extended Temperature Devices Available
•8-Pin PDIP, 8-Pin JEDEC SOIC, and 8-Pin TSSOP Packages
Description
The AT93C46A provides 1024 bits of serial electrically erasable programmable read only memory (EEPROM) organized as 64 words of 16 bits each. The device is optimized for use in many industrial and commercial applications where low power and low voltage operation are essential. The AT93C46A is available in space saving 8-pin PDIP, 8-pin JEDEC, and 8-Pin TSSOP packages.
The AT93C46A 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 selftimed 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.
Pin Configurations
Pin Name |
Function |
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CS |
Chip Select |
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SK |
Serial Data Clock |
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DI |
Serial Data Input |
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DO |
Serial Data Output |
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GND |
Ground |
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VCC |
Power Supply |
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NC |
No Connect |
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DC |
Don’t Connect |
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8-Pin PDIP
CS |
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1 |
8 |
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VCC |
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SK |
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2 |
7 |
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DC |
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DI |
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3 |
6 |
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NC |
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DO |
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4 |
5 |
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GND |
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8-Pin SOIC
CS |
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1 |
8 |
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VCC |
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SK |
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2 |
7 |
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DC |
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DI |
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3 |
6 |
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NC |
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DO |
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4 |
5 |
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GND |
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8-Pin TSSOP
CS |
1 |
8 |
VCC |
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SK |
2 |
7 |
DC |
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DI |
3 |
6 |
NC |
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DO |
4 |
5 |
GND |
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3-Wire |
Serial EEPROM |
1K (64 x 16) |
AT93C46A |
Rev. 0539C–07/98 |
1 |
The AT93C46A is available in 4.5V to 5.5V, 2.7V to 5.5V, and 2.5V to 5.5V versions.
Absolute Maximum Ratings*
..................................Operating Temperature |
-55°C to +125°C |
*NOTICE: Stresses beyond those listed under “Absolute |
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Maximum Ratings” may cause permanent dam- |
Storage Temperature ..................................... |
-65°C to +150°C |
age to the device. This is a stress rating only and |
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functional operation of the device at these or any |
Voltage on Any Pin |
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other conditions beyond those indicated in the |
with Respect to Ground ..................................... |
-1.0V to +7.0V |
operational sections of this specification is not |
Maximum Operating Voltage |
6.25V |
implied. Exposure to absolute maximum rating |
conditions for extended periods may affect |
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DC Output Current |
5.0 mA |
device reliability. |
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Block Diagram
Pin Capacitance(1)
Applicable over recommended operating range from TA = 25°C, f = 1.0 MHz, V CC = +5.0V (unless otherwise noted).
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Test Conditions |
Max |
Units |
Conditions |
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COUT |
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Output Capacitance (DO) |
5 |
pF |
VOUT = 0V |
CIN |
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Input Capacitance (CS, SK, DI) |
5 |
pF |
VIN = 0V |
Note: |
1. This parameter is characterized and is not 100% tested. |
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2 |
AT93C46A |
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AT93C46A
DC Characteristics
Applicable over recommended operating range from: TAI = -40°C to +85°C, VCC = +2.5V to +5.5V, TAC = 0°C to +70°C, VCC = +2.5V to +5.5V (unless otherwise noted).
Symbol |
Parameter |
Test Condition |
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Min |
Typ |
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Max |
Units |
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VCC1 |
Supply Voltage |
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1.8 |
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5.5 |
V |
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VCC2 |
Supply Voltage |
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2.5 |
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5.5 |
V |
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VCC3 |
Supply Voltage |
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2.7 |
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5.5 |
V |
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VCC4 |
Supply Voltage |
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4.5 |
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5.5 |
V |
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ICC |
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Supply Current |
VCC = 5.0V |
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READ at 1.0 MHz |
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0.5 |
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2.0 |
mA |
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WRITE at 1.0 MHz |
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0.5 |
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2.0 |
mA |
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ISB1 |
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Standby Current |
VCC = 2.5V |
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CS = 0V |
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14.0 |
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20.0 |
μA |
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ISB2 |
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Standby Current |
VCC = 2.7V |
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CS = 0V |
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14.0 |
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20.0 |
μA |
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ISB3 |
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Standby Current |
VCC = 5.0V |
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CS = 0V |
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35.0 |
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50.0 |
μA |
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IIL |
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Input Leakage |
VIN = 0V to VCC |
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0.1 |
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1.0 |
μA |
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IOL |
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Output Leakage |
VIN = 0V to VCC |
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0.1 |
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1.0 |
μA |
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V |
IL1 |
(1) |
Input Low Voltage |
4.5V |
≤ V |
≤ 5.5V |
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-0.6 |
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0.8 |
V |
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CC |
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(1) |
Input High Voltage |
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2.0 |
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VCC + 1 |
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VIH1 |
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V |
IL2 |
(1) |
Input Low Voltage |
1.8V |
≤ V |
≤ 2.7V |
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-0.6 |
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V |
CC |
x 0.3 |
V |
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CC |
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(1) |
Input High Voltage |
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VCC x 0.7 |
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VCC + 1 |
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VIH2 |
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VOL1 |
Output Low Voltage |
4.5V ≤ VCC |
≤ 5.5V |
IOL = 2.1 mA |
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0.4 |
V |
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VOH1 |
Output High Voltage |
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IOH = -0.4 mA |
2.4 |
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V |
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VOL2 |
Output Low Voltage |
1.8V ≤ VCC |
≤ 2.7V |
IOL = 0.15 mA |
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0.2 |
V |
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VOH2 |
Output High Voltage |
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IOH = -100 μA |
VCC - 0.2 |
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V |
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Note: 1. |
VIL min and VIH max are reference only and are not tested. |
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AC Characteristics
Applicable over recommended operating range from TA = -40°C to + 85°C, VCC = +2.5V to + 5.5V, CL = 1 TTL Gate and 100 pF (unless otherwise noted).
Symbol |
Parameter |
Test Condition |
Min |
Typ |
Max |
Units |
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4.5V |
≤ VCC ≤ 5.5V |
0 |
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2 |
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fSK |
SK Clock Frequency |
2.7V |
≤ VCC ≤ 5.5V |
0 |
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1 |
MHz |
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2.5V |
≤ VCC |
≤ 5.5V |
0 |
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0.5 |
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1.8V |
≤ VCC |
≤ 5.5V |
0 |
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0.25 |
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4.5V |
≤ VCC |
≤ 5.5V |
250 |
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tSKH |
SK High Time |
2.7V |
≤ VCC |
≤ 5.5V |
250 |
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ns |
2.5V |
≤ VCC |
≤ 5.5V |
500 |
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1.8V |
≤ VCC ≤ 5.5V |
1000 |
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4.5V |
≤ VCC ≤ 5.5V |
250 |
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tSKL |
SK Low Time |
2.7V |
≤ VCC ≤ 5.5V |
250 |
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ns |
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2.5V |
≤ VCC |
≤ 5.5V |
500 |
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1.8V |
≤ VCC |
≤ 5.5V |
1000 |
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4.5V |
≤ VCC ≤ 5.5V |
250 |
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tCS |
Minimum CS Low Time |
2.7V |
≤ VCC ≤ 5.5V |
250 |
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ns |
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2.5V |
≤ VCC |
≤ 5.5V |
500 |
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1.8V |
≤ VCC ≤ 5.5V |
1000 |
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AC Characteristics (Continued)
Applicable over recommended operating range from TA = -40°C to + 85°C, VCC = +2.5V to + 5.5V, CL = 1 TTL Gate and 100 pF (unless otherwise noted).
Symbol |
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Parameter |
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Test Condition |
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Min |
Typ |
Max |
Units |
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4.5V ≤ VCC ≤ 5.5V |
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50 |
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tCSS |
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CS Setup Time |
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Relative to SK |
2.7V ≤ VCC ≤ 5.5V |
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50 |
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ns |
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2.5V ≤ VCC |
≤ 5.5V |
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100 |
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1.8V ≤ VCC |
≤ 5.5V |
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200 |
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4.5V ≤ VCC ≤ 5.5V |
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100 |
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tDIS |
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DI Setup Time |
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Relative to SK |
2.7V ≤ VCC ≤ 5.5V |
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100 |
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ns |
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2.5V ≤ VCC |
≤ 5.5V |
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200 |
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1.8V ≤ VCC ≤ 5.5V |
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400 |
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tCSH |
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CS Hold Time |
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Relative to SK |
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0 |
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ns |
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4.5V ≤ VCC ≤ 5.5V |
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100 |
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tDIH |
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DI Hold Time |
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Relative to SK |
2.7V ≤ VCC ≤ 5.5V |
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100 |
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ns |
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2.5V ≤ VCC |
≤ 5.5V |
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200 |
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1.8V ≤ VCC |
≤ 5.5V |
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400 |
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4.5V ≤ VCC ≤ 5.5V |
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250 |
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tPD1 |
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Output Delay to ‘1’ |
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AC Test |
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2.7V ≤ VCC ≤ 5.5V |
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250 |
ns |
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2.5V ≤ VCC |
≤ 5.5V |
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500 |
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1.8V ≤ VCC ≤ 5.5V |
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1000 |
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4.5V ≤ VCC |
≤ 5.5V |
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250 |
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tPD0 |
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Output Delay to ‘0’ |
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AC Test |
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2.7V ≤ VCC |
≤ 5.5V |
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250 |
ns |
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2.5V ≤ VCC |
≤ 5.5V |
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500 |
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1.8V ≤ VCC ≤ 5.5V |
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1000 |
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4.5V ≤ VCC ≤ 5.5V |
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250 |
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tSV |
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CS to Status Valid |
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AC Test |
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2.7V ≤ VCC ≤ 5.5V |
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250 |
ns |
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2.5V ≤ VCC |
≤ 5.5V |
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500 |
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1.8V ≤ VCC |
≤ 5.5V |
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1000 |
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4.5V ≤ VCC ≤ 5.5V |
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100 |
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tDF |
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CS to DO in High Impedance |
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AC Test |
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2.7V ≤ VCC ≤ 5.5V |
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100 |
ns |
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CS = VIL |
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2.5V ≤ VCC |
≤ 5.5V |
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200 |
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1.8V ≤ VCC ≤ 5.5V |
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400 |
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tWP |
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Write Cycle Time |
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0.1 |
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10 |
ms |
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4.5V ≤ VCC ≤ 5.5V |
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1 |
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ms |
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Endurance(1) |
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5.0V, 25°C, Page Mode |
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1M |
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Write |
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Cycle |
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Note: 1. This parameter is characterized and is not 100% tested. |
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Instruction Set for the AT93C46A |
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Address |
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Instruction |
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SB |
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Op Code |
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Comments |
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x 16 |
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READ |
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1 |
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10 |
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A5 - A0 |
Reads data stored in memory, at specified address. |
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EWEN |
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1 |
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00 |
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11XXXX |
Write enable must precede all programming modes. |
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ERASE |
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1 |
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11 |
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A5 - A0 |
Erase memory location An - A0. |
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WRITE |
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1 |
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01 |
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A5 - A0 |
Writes memory location An - A0. |
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ERAL |
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1 |
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00 |
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10XXXX |
Erases all memory locations. Valid only at VCC = 4.5V to 5.5V. |
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WRAL |
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1 |
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00 |
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01XXXX |
Writes all memory locations. Valid only at VCC = 4.5V to 5.5V. |
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EWDS |
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1 |
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00 |
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00XXXX |
Disables all programming instructions. |
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4 |
AT93C46A |
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