February 2000
NM93C46A
1K-Bit Serial CMOS EEPROM
(MICROWIRE™ Synchronous Bus)
General Description
NM93C46A is a 1024-bit CMOS non-volatile EEPROM organized as 64 x 16-bit array. This device features MICROWIRE interface which is a 4-wire serial bus with chipselect (CS), clock (SK), data input (DI) and data output (DO) signals. This interface is compatible to many of standard Microcontrollers and Microprocessors. This device offers a pin (ORG), using which, the user can select the format of the data (16-bit or 8-bit). If ORG is tied to GND, then 8-bit format is selected, while if ORG is tied to VCC, then 16-bit format is selected. There are 7 instructions implemented on the NM93C46A for various Read, Write, Erase, and Write Enable/ Disable operations. This device is fabricated using Fairchild Semiconductor floating-gate CMOS process for high reliability, high endurance and low power consumption.
“LZ” and “L” versions of NM93C46A offer very low standby current making them suitable for low power applications. This device is offered in both SO and TSSOP packages for small space considerations.
Features
■Wide VCC 2.7V - 5.5V
■User selectable organization x16 (ORG = 1)
x8 (ORG = 0)
■Typical active current of 200 A 10 A standby current typical 1 A standby current typical (L)
0.1 A standby current typical (LZ)
■No Erase instruction required before Write instruction
■Self timed write cycle
■Device status during programming cycles
■40 year data retention
■Endurance: 1,000,000 data changes
■Packages available: 8-pin SO, 8-pin DIP, 8-pin TSSOP
Functional Diagram
CS |
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INSTRUCTION |
VCC |
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SK |
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DECODER |
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CONTROL LOGIC |
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DI |
INSTRUCTION |
AND CLOCK |
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GENERATORS |
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REGISTER |
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HIGH VOLTAGE |
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ADDRESS |
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GENERATOR |
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REGISTER |
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AND |
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PROGRAM |
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TIMER |
ORG |
DECODER |
EEPROM ARRAY |
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16 |
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READ/WRITE AMPS |
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16 |
VSS |
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DATA IN/OUT REGISTER |
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16/8 BITS |
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DO |
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DATA OUT BUFFER |
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(MICROWIRE TM
Synchronous Bus)
EEPROM CMOS Serial Bit-1K NM93C46A
© 2000 Fairchild Semiconductor International |
1 |
www.fairchildsemi.com |
NM93C46A Rev. F
Connection Diagram
Dual-In-Line Package (N)
8–Pin SO (M8) and 8–Pin TSSOP (MT8)
CS |
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8 |
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VCC |
NC |
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1 |
8 |
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ORG |
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SK |
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2 |
Normal |
7 |
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NC |
VCC |
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2 |
Rotated |
7 |
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GND |
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DI |
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3 |
Pinout |
6 |
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ORG |
CS |
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3 |
Pinout |
6 |
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DO |
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DO |
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4 |
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5 |
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GND |
SK |
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4 |
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5 |
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DI |
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Top View |
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Package Number |
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N08E, M08A and MTC08 |
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Pin Names |
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CS |
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Chip Select |
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SK |
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Serial Data Clock |
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DI |
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Serial Data Input |
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DO |
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Serial Data Output |
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GND |
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Ground |
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ORG |
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Organization |
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NC |
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No Connect |
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VCC |
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Power Supply |
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NOTE: Pins designated as "NC" are typically unbonded pins. However some of them are bonded for special testing purposes. Hence if a signal is applied to these pins, care should be taken that the voltage applied on these pins does not exceed the VCC applied to the device. This will ensure proper operation.
Ordering Information |
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NM 93 |
C |
XX A T LZ E XXX |
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Letter Description |
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Package |
N |
8-pin DIP |
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M8 |
8-pin SO |
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MT8 |
8-pin TSSOP |
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Temp. Range |
None |
0 to 70°C |
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V |
-40 to +125°C |
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E |
-40 to +85°C |
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Voltage Operating Range |
Blank |
4.5V to 5.5V |
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L |
2.7V to 5.5V |
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LZ |
2.7V to 5.5V and |
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<1 A Standby Current |
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Blank |
Normal Pinout |
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T |
Rotated Pinout |
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A |
x8 or x16 configuration |
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Density |
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46 |
1024 bits |
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C |
CMOS |
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CS |
Data protect and sequential |
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read |
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Interface |
93 |
MICROWIRE |
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Fairchild Memory Prefix |
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(MICROWIRE TM
Synchronous Bus)
EEPROM CMOS Serial Bit-1K NM93C46A
2 |
www.fairchildsemi.com |
NM93C46A Rev. F
Absolute Maximum Ratings (Note 1)
Ambient Storage Temperature |
-65°C to +150°C |
All Input or Output Voltages |
+6.5V to -0.3V |
with Respect to Ground |
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Lead Temperature |
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(Soldering, 10 sec.) |
+300°C |
ESD rating |
2000V |
Operating Conditions
Ambient Operating Temperature |
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NM93C46A |
0°C to +70°C |
NM93C46AE |
-40°C to +85°C |
NM93C46AV |
-40°C to +125°C |
Power Supply (VCC) |
4.5V to 5.5V |
DC and AC Electrical Characteristics VCC = 4.5V to 5.5V unless otherwise specified
Symbol |
Parameter |
Conditions |
Min |
Max |
Units |
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ICCA |
Operating Current |
CS = VIH, SK=1.0 MHz |
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1 |
mA |
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ICCS |
Standby Current |
CS = VIL |
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50 |
A |
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IIL |
Input Leakage |
VIN = 0V to VCC |
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±-1 |
A |
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IOL |
Output Leakage |
(Note 2) |
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IILO |
Input Leakage ORG Pin |
ORG tied to VCC |
-1 |
1 |
A |
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ORG tied to VSS (Note 3) |
-2.5 |
2.5 |
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VIL |
Input Low Voltage |
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-0.1 |
0.8 |
V |
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VIH |
Input High Voltage |
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2 |
VCC +1 |
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VOL1 |
Output Low Voltage |
IOL = 2.1 mA |
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0.4 |
V |
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VOH1 |
Output High Voltage |
IOH = -400 A |
2.4 |
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VOL2 |
Output Low Voltage |
IOL = 10 A |
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0.2 |
V |
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VOH2 |
Output High Voltage |
IOH = -10 A |
VCC - 0.2 |
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fSK |
SK Clock Frequency |
(Note 4) |
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1 |
MHz |
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tSKH |
SK High Time |
0°C to +70°C |
250 |
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ns |
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-40°C to +125°C |
300 |
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tSKL |
SK Low Time |
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250 |
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ns |
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tSKS |
SK Setup Time |
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50 |
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ns |
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tCS |
Minimum CS Low Time |
(Note 5) |
250 |
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ns |
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tCSS |
CS Setup Time |
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100 |
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ns |
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tDH |
DO Hold Time |
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70 |
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ns |
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tDIS |
DI Setup Time |
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100 |
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ns |
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tCSH |
CS Hold Time |
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0 |
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ns |
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tDIH |
DI Hold Time |
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20 |
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ns |
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tPD |
Output Delay |
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500 |
ns |
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tSV |
CS to Status Valid |
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500 |
ns |
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tDF |
CS to DO in Hi-Z |
CS = VIL |
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100 |
ns |
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tWP |
Write Cycle Time |
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10 |
ms |
(MICROWIRE TM
Synchronous Bus)
EEPROM CMOS Serial Bit-1K NM93C46A
3 |
www.fairchildsemi.com |
NM93C46A Rev. F
Absolute Maximum Ratings (Note 1)
Ambient Storage Temperature |
-65°C to +150°C |
All Input or Output Voltages |
+6.5V to -0.3V |
with Respect to Ground |
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Lead Temperature |
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(Soldering, 10 sec.) |
+300°C |
ESD rating |
2000V |
Operating Conditions
Ambient Operating Temperature |
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NM93C46AL/LZ |
0°C to +70°C |
NM93C46ALE/LZE |
-40°C to +85°C |
NM93C46ALV/LZV |
-40°C to +125°C |
Power Supply (VCC) |
2.7V to 5.5V |
DC and AC Electrical Characteristics VCC = 2.7V to 5.5V unless otherwise specified
Symbol |
Parameter |
Conditions |
Min |
Max |
Units |
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ICCA |
Operating Current |
CS = VIH, SK=1.0 MHz |
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1 |
mA |
ICCS |
Standby Current |
CS = VIL |
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A |
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L |
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10 |
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LZ (2.7V to 4.5V) |
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1 |
A |
IIL |
Input Leakage |
VIN = 0V to VCC |
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±1 |
A |
IOL |
Output Leakage |
(Note 2) |
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IILO |
Input Leakage ORG Pin |
ORG tied to VCC |
-1 |
1 |
A |
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ORG tied to VSS (Note 3) |
-2.5 |
2.5 |
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VIL |
Input Low Voltage |
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-0.1 |
0.15VCC |
V |
VIH |
Input High Voltage |
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0.8VCC |
VCC +1 |
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VOL |
Output Low Voltage |
IOL = 10 A |
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0.1VCC |
V |
VOH |
Output High Voltage |
IOH = -10 A |
0.9VCC |
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fSK |
SK Clock Frequency |
(Note 4) |
0 |
250 |
KHz |
tSKH |
SK High Time |
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1 |
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s |
tSKL |
SK Low Time |
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1 |
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tSKS |
SK Setup Time |
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0.2 |
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tCS |
Minimum CS Low Time |
(Note 5) |
1 |
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tCSS |
CS Setup Time |
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0.2 |
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tDH |
DO Hold Time |
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70 |
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tDIS |
DI Setup Time |
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0.4 |
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tCSH |
CS Hold Time |
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0 |
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tDIH |
DI Hold Time |
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0.4 |
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s |
tPD |
Output Delay |
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2 |
s |
tSV |
CS to Status Valid |
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1 |
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tDF |
CS to DO in Hi-Z |
CS = VIL |
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0.4 |
s |
tWP |
Write Cycle Time |
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15 |
ms |
Capacitance TA = 25°C, f = 1 MHz (Note 6)
Symbol |
Test |
Typ |
Max |
Units |
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COUT |
Output Capacitance |
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5 |
pF |
CIN |
Input Capacitance |
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5 |
pF |
Note 1: Stress above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Note 2: Typical leakage values are in the 20nA range.
Note 3: ORG pin may draw >1 A when in x8 mode due to the internal pull-up transistor.
Note 4: The shortest allowable SK clock period = 1/fSK (as shown under the fSK parameter). Maximum SK clock speed (minimum SK period) is determined by the interaction of several AC parameters stated in the datasheet. Within this SK period, both tSKH and tSKL limits must be observed. Therefore, it is not allowable to set 1/fSK = tSKHminimum + tSKLminimum for shorter SK cycle time operation.
Note 5: CS (Chip Select) must be brought low (to VIL) for an interval of tCS in order to reset all internal device registers (device reset) prior to beginning another opcode cycle. (This is shown in the opcode diagram on the following page.)
Note 6: This parameter is periodically sampled and not 100% tested.
AC Test Conditions
VCC Range |
VIL/VIH |
VIL/VIH |
VOL/VOH |
IOL/IOH |
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Input Levels |
Timing Level |
Timing Level |
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2.7V ≤ VCC ≤ 5.5V |
0.3V/1.8V |
1.0V |
0.8V/1.5V |
±10 A |
(Extended Voltage Levels) |
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4.5V ≤ VCC ≤ 5.5V |
0.4V/2.4V |
1.0V/2.0V |
0.4V/2.4V |
2.1mA/-0.4mA |
(TTL Levels) |
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Output Load: 1 TTL Gate (CL = 100 pF) |
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(MICROWIRE TM
Synchronous Bus)
EEPROM CMOS Serial Bit-1K NM93C46A
4 |
www.fairchildsemi.com |
NM93C46A Rev. F