Contents
Features .............................................................. 1
Pin Assignment ................................................... 1
Pin Functions ...................................................... 1
Block Diagram ..................................................... 2
Instruction Set ..................................................... 2
Absolute Maximum Ratings................................. 2
Recommended Operating Conditions ................. 3
Pin Capacitance .................................................. 3
Endurance........................................................... 3
DC Electrical Characteristics ............................... 4
AC Electrical Characteristics ............................... 5
Operation ............................................................ 6
Receiving a Start-Bit............................................ 13
Three-wire Interface (DI-DO direct connection) ... 13
Dimensions (Unit : mm) ....................................... 14
Ordering Information ........................................... 17
Characteristics..................................................... 18
Frequently Asked Questions................................ 23
read, at which time addresses are automatically incremented in 16-bit bl
The instruction code is compatible with the NM93CS46/56/66.
n
Features
Ÿ
Low power consumption
Standby : 1.0
µ
A Max. (VCC=5.5 V)
Operating : 0.8 mA Max. (VCC=5.5 V)
: 0.4 mA Max. (VCC=2.5 V)
Ÿ
Endurance : 10
6
cycles/word
Ÿ
Data retention : 10 years
Ÿ
Wide operating voltage range
Read/Write : 1.8 to 5.5 V
Ÿ
S-93C46A : 1K bits NM93CS46 instruction code compati
Ÿ
S-93C56A : 2K bits NM93CS56 instruction code compati
Ÿ
S-93C66A : 4K bits NM93CS66 instruction code compati
Ÿ
Sequential read capable
n
Pin Assignment
8-pin DIP
Top view
CS
SK
DI
DO
8-pin SOP1
Top view
8
7
6
5
V
CC
NC
TEST
GND
NC
V
CC
8-pin SOP2
Top view
TEST
GND
DO
DI
CS
SK
DI
DO
8-pin TSSOP
Top view
V
CC
NC
TEST
GND
CS
SK
DI
DO
1
2
3
4
S-93C46ADP
S-93C56ADP
S-93C66ADP
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
CS
SK
1
2
3
4
S-93C46AFT
S-93C56AFT
S-93C66AFT
8
7
6
5
V
C
N
TE
G
S-93C46AFJ
S-93C56AFJ
S-93C66AFJ
S-93C46ADFJ
S-93C56ADFJ
S-93C66ADFJ
V
CC
NC
TEST
GND
8-pin MSOP
Top view
1
2
3
4
8
7
6
5
CS
SK
DI
DO
* See
n
Dimensions
S-93C46AMFN
S-93C56AMFN
S-93C66AMFN
Figure 1
n
Pin Functions
Table 1
Pin Number
Name
DIP
CS
SK
DI
DO
GND
TEST
NC
V
CC
1
2
3
4
5
6
7
8
SOP1
3
4
5
6
7
8
1
2
SOP2
1
2
3
4
5
6
7
8
TSSOP MSOP
1
2
3
4
5
6
7
8
8
7
6
5
4
3
2
1
Chip select input
Serial clock input
Serial data input
Serial data output
Ground
Test pin (normally kept open)
(can be connected to GND or Vcc)
No Connection
Power supply
Function
Seiko Instruments Inc.
Mode decode logic
CS
SK
Clock generator
Figure 2
n
Instruction Set
Table 2
Instruction
Start
Bit
Op
Code
S-93C46A
READ
WRITE
(Read data)
(Write data)
1
1
1
1
1
1
1
10
01
11
00
00
00
00
A
5
to A
0
A
5
to A
0
A
5
to A
0
01xxxx
10xxxx
11xxxx
00xxxx
S-93C56A
XA
6
to A
0
XA
6
to A
0
XA
6
to A
0
01xxxxxx
10xxxxxx
11xxxxxx
00xxxxxx
S-93C66A
A
7
to A
0
A
7
to A
0
A
7
to A
0
01xxxxxx
10xxxxxx
11xxxxxx
00xxxxxx
D
15
to D
0
Output*1
D
15
to D
0
Input
Address
Data
ERASE (Erase data)
WRAL
ERAL
EWEN
EWDS
x :
*1 :
*2 :
(Write all)*2
(Erase all)*2
(Program enable)
(Program disable)
D
15
to D
0
Input
Doesn’t matter.
Addresses are continuously incremented.
Valid only at Vcc = 2.5 V to 5.5 V.
n
Absolute Maximum Ratings
Table 3
Parameter
Power supply voltage
Input voltage
Output voltage
Storage temperature under bias
Storage temperature
Symbol
V
CC
V
IN
V
OUT
T
bias
T
stg
Ratings
-0.3 to +7.0
-0.3 to V
CC
+0.3
-0.3 to V
CC
-50 to +95
-65 to +150
Unit
V
V
V
°C
°C
2
Seiko Instruments Inc.
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