64-bit FUSE ROM
S-2100R
n Terminal Description
Table 1
Pin No.
1
Symbol
DATA
Pin Name
Data input/output terminal
2
CE/PE Mode select terminal
COUNTER
3
OUT
Counter output terminal
4
VSS
Negative power supply terminal
5
PD/VPP Program voltage input terminal
6
CLK Clock input terminal
7
RST Reset input terminal
8
VDD
Positive power supply terminal
Description
Tri-state data input/output terminal
Mode select terminal
(Refer to operation mode table)
6-bit counter; 64th bit detection output terminal
Normally, connected to GND.
Input terminal of writing voltage to FUSE memory at 21 V.
(Refer to operation mode table.) Pull-down resistor built
in.
Clock input terminal of 6-bit counter. Operates at the
falling edge.
Reset input terminal of 6-bit counter. Operates at “L”.
Normally, connected to +1.1 to +5.5 V.
n Mode Table
Terminal
Read
Read
Counter hold
Program
CE/PE
VSS
VDD
VDD
PD/VPP
VSS
VSS
VPP
Table 2
CLK
Input possible
Input impossible
Input impossible
RST
Input possible
Input impossible
Input impossible
DATA
Data output
High impedance
Data input
n Absolute Maximum Ratings
Table 3
Parameter
Symbol
Ratings
Unit
Power supply voltage
PD/VPP input voltage
Input voltage
Output voltage
Storage temperature
under bias
Storage temperature
VDD
VPP
VIN
VOUT
Vbias
Vstg
-0.3 to +6.5
V
-0.3 to 26
V
VSS -0.3 to VDD+0.3
V
VSS -0.3 to VDD+0.3
V
-30 to +85
°C
-40 to +125
°C
n Recommended Operating Conditions
Table 4
Parameter
Power supply voltage
High level input voltage
Low level input voltage
Operating temperature
Symbol
Conditions
Min.
Typ. Max. Unit
Ta=25°C, Read, tCH=15ms
1.1
1.5
5.5
V
VDD
Ta=25°C, Write
4.5
5.0
5.5
V
Ta=25°C, Read
VIH
Ta=25°C, Write
VDD-0.3
¾
VDD
V
VDD-0.3
¾
VDD
V
Ta=25°C, Read
VIL
Ta=25°C, Write
-0.3
¾
0.3
V
-0.3
¾
0.5
V
Vopr
-20
¾
70
°C
2
Seiko Instruments Inc.