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MC-458CB646 Datasheet(PDF) 5 Page - NEC

Part # MC-458CB646
Description  8M-WORD BY 64-BIT SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

MC-458CB646 Datasheet(HTML) 5 Page - NEC

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Data Sheet M13049EJ7V0DS00
5
MC-458CB646
Electrical Specifications
• All voltages are referenced to VSS (GND).
• After power up, wait more than 100
µs and then, execute power on sequence and CBR (Auto) refresh before proper
device operation is achieved.
Absolute Maximum Ratings
Parameter
Symbol
Condition
Rating
Unit
Voltage on power supply pin relative to GND
VCC
–0.5 to +4.6
V
Voltage on input pin relative to GND
VT
–0.5 to +4.6
V
Short circuit output current
IO
50
mA
Power dissipation
PD
4W
Operating ambient temperature
TA
0 to 70
°C
Storage temperature
Tstg
–55 to +125
°C
Caution
Exposing the device to stress above those listed in Absolute Maximum Ratings could cause
permanent damage. The device is not meant to be operated under conditions outside the limits
described in the operational section of this specification. Exposure to Absolute Maximum Rating
conditions for extended periods may affect device reliability.
Recommended Operating Conditions
Parameter
Symbol
Condition
MIN.
TYP.
MAX.
Unit
Supply voltage
VCC
3.0
3.3
3.6
V
High level input voltage
VIH
2.0
VCC + 0.3
V
Low level input voltage
VIL
−0.3
+0.8
V
Operating ambient temperature
TA
070
°C
Capacitance (TA = 25
°°°°C, f = 1 MHz)
Parameter
Symbol
Test condition
MIN.
TYP.
MAX.
Unit
Input capacitance
CI1
A0 - A11, BA0(A13), BA1(A12), /RAS, /CAS, /WE
22
40
pF
CI2
CLK0, CLK2
24
40
CI3
CKE0
22
40
CI4
/CS0, /CS2
12
20
CI5
DQMB0 - DQMB7
7
13
Data input/output capacitance
CI/O
DQ0 - DQ63
7
13
pF
5
5


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