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93AA46, 93LC46, 93C46
93AA46A/B, 93LC46A/B, 93C46A/B
1K Microwire® Serial EEPROM
Device Selection Table
Part
Number
93AA46
93LC46
93C46
93AA46A
93AA46B
93LC46A
93LC46B
93C46A
93C46B
VCC
Range
1.8-5.5
2.5-5.5
4.5-5.5
1.8-5.5
1.8-5-5
2.5-5.5
2.5-5.5
4.5-5.5
4.5-5.5
Org Pin Word Size
Temp
Ranges
Yes 8 or 16-bit
I
Yes 8 or 16-bit I, E
Yes 8 or 16-bit I, E
No 8-bit
I
No 16-bit
I
No 8-bit
I, E
No 16-bit
I, E
No 8-bit
I, E
No 16-bit
I, E
Features
• Low power CMOS technology
• ORG pin for selectable memory configuration
• No org pin for dedicated word sizes
- 128 x 8-bit organization ‘A’ version devices
- 64 x 16-bit organization ‘B’ version devices
• Self-timed ERASE and WRITE cycles (including
auto-erase)
• Automatic ERAL before WRAL
• Power on/off data protection circuitry
• Industry standard 3-wire serial I/O
• Device status signal during ERASE/WRITE cycles
• Sequential READ function
• 1,000,000 E/W cycles
• Data retention > 200 years
• 8-pin MSOP and 6-pin SOT
• Temperature ranges supported:
- Industrial (I):
-40°C to +85°C
- Automotive (E)
-40°C to +125°C
Package Types
MSOP
CS
CLK
DI
DO
1
2
3
4
8 VCC
7 NU
6 ORG*
5 VSS
* Org pin is not available on A/B devices
Description
The Microchip Technology Inc. 93AA46, 93LC46,
93C46, 93AA46A/B, 93LC46A/B & 93C46A/B are 1K
low voltage serial Electrically Erasable PROMs
(EEPROM). Generic memory devices such as the
93AA46, 93LC46 or 93C46 are dependent upon exter-
nal logic levels driving the ORG pin to set word size.
For dedicated 8-bit communication, the 93AA46A,
93LC46A or 93C46A devices are selected, while the
93AA46B, 93LC46B and 93C46B devices are selected
for 16 bits. Advanced CMOS technology makes these
devices ideal for low power, non-volatile memory
applications. This 93XX Series is available in standard
8-lead MSOP and 6-lead SOT-23 packages.
Block Diagram
VCC VSS
MEMORY
ARRAY
ADDRESS
DECODER
DI
ORG*
CS
DATA REGISTER
MODE
DECODE
LOGIC
ADDRESS
COUNTER
OUTPUT
BUFFER
DO
CLK
CLOCK
REGISTER
* Org input is not available on A/B devices
SOT-23**
DO 1
VSS 2
DI 3
6 VCC
5 CS
4 CLK
** SOT-23 device only offered in A/B versions
2002 Microchip Technology Inc.
DS21749A-page 1

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93XX46, 93XX46A/B
1.0 ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings†
VCC.............................................................................................................................................................................6.5V
All inputs and outputs w.r.t. VSS ......................................................................................................... -0.6V to VCC +1.0V
Storage temperature ...............................................................................................................................-65°C to +150°C
Ambient temp. with power applied ..........................................................................................................-40°C to +125°C
ESD protection on all pins ......................................................................................................................................................≥ 4 kV
† NOTICE: Stresses above those listed under “Maximum ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions
for extended periods may affect device reliability.
DC CHARACTERISTICS
DC CHARACTERISTICS
VCC = +1.8V to +5.5V
Industrial (I): TAMB = -40°C to +85°C
Automotive (E): TAMB = -40°C to +125°C
Param.
No.
Sym
Characteristic
Min Typ Max Units
Conditions
D1 VIH1 High level input voltage 2.0
— VCC +1
VIH2
0.7 VCC — VCC +1
D2 VIL1 Low level input voltage -0.3 — 0.8
VIL2
-0.3 — 0.2 VCC
D3 VOL1 Low level output voltage —
— 0.4
VOL2
— — 0.3
D4 VOH1 High level output voltage 2.4 — —
VOH2
VCC-0.2
D5 ILI Input leakage current
— — ±10
D6 ILO Output leakage current —
— ±10
D7 CIN, Pin capacitance
COUT (all inputs/outputs)
—— 7
D8 ICC write Operating current
—— 3
D9 ICC read
—— 1
— — 500
— 100 —
D10 ICCS2 Standby current
—— 1
—— 5
Note 1: This parameter is tested at TAMB = 25°C and FCLK = 1 MHz.
2: This parameter is periodically sampled and not 100% tested.
3: Org pin not available on ‘A’ or ‘B’ versions.
V VCC 2.7V
V VCC < 2.7V
V VCC 2.7V
V VCC < 2.7V
V IOL = 2.1 mA, VCC = 4.5V
V IOL = 100 µA, VCC = 2.5V
V IOH = -400 µA, VCC = 4.5V
V IOH = -100 µA, VCC = 2.5V
µA VIN = 0.1V to VCC
µA VOUT = 0.1V to VCC
pF VIN/VOUT = 0V (Note 1 & 2)
TAMB = 25°C, FCLK = 1 MHz
mA FCLK = 2 MHz, VCC = 5.5V
mA FCLK = 2 MHz, VCC = 5.5V
µA FCLK = 1 MHz, VCC = 3.0V
µA FCLK = 1 MHz, VCC = 2.5V
µA I-Temp
µA E-Temp
CLK = CS = 0V
ORG = DI = VSS or VCC
(Note 3)
DS21749A-page 2
2002 Microchip Technology Inc.

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93XX46, 93XX46A/B
AC CHARACTERISTICS
AC CHARACTERISTICS
VCC = +1.8V to +5.5V
Industrial (I):
TAMB = -40°C to +85°C
Automotive (E): TAMB = -40°C to +125°C
Param.
No.
Sym
Characteristic
Min Typ Max Units
Conditions
1 FCLK Clock frequency
— — 2 MHz VCC 4.5V
— — 1 MHz VCC < 4.5V
2 TCKH Clock high time
250 — — ns
3 TCKL Clock low time
250 — — ns
4 TCSS Chip select setup time 50 — — ns Relative to CLK
5 TCSH Chip select hold time
0 — — ns Relative to CLK
6 TCSL Chip select low time
250 — — ns
7 TDIS Data input setup time
100 — — ns Relative to CLK
8 TDIH Data input hold time
100 — — ns Relative to CLK
9 TPD Data output delay time — — 400 ns CL = 100 pF
10
TCZ Data output disable time
— 100 ns CL = 100 pf (Note 2)
11 TSV Status valid time
— — 500 ns CL = 100 pF
12 TWC Program cycle time
— 4 10 ms ERASE/WRITE mode
1.5 2 ms 93CXX devices only
13 TEC
— 8 15 ms ERAL mode (VCC=5V ±10%)
14 TWL
— 16 30 ms WRAL mode (VCC=5V ±10%)
15 — Endurance
1M — 1M cycles 25°C, VCC = 5.0V, ERAL/
WRAL (Note 3)
Note 1: This parameter is tested at TAMB = 25°C and FCLK = 1 MHz.
2: This parameter is periodically sampled and not 100% tested.
3: This parameter is not tested but ensured by characterization. For endurance estimates in a specific
application, please consult the Total Endurance Model which can be obtained on Microchip’s website:
www.microchip.com.
FIGURE 1-1:
SYNCHRONOUS DATA TIMING
CS VIH
VIL
VIH
CLK
VIL
VIH
DI
VIL
DO VOH
(READ) VOL
DO VOH
(WRITE)
VOL
42
78
9
11
3
9
STATUS VALID
5
10
10
2002 Microchip Technology Inc.
DS21749A-page 3