82V2608BB IDT, Integrated Device Technology Inc, 82V2608BB Datasheet - Page 29

• Manufacturer Part Number: 82V2608BB
• Manufacturer: IDT, Integrated Device Technology Inc

Specifications of 82V2608BB

• Utopia Level: Level 2
• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 2.97V
• Operating Supply Voltage (max): 3.63V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Package Type: BGA
• Pin Count: 208
• Mounting: Surface Mount
• Lead Free Status / Rohs Status: Not Compliant

3.4
bit wide address bus, EMA[18:0]. The minimum throughput is 4 Mbyte/s
and the minimum access time is 40ns.
external SRAM. When both EM_OE pin and EM_CS pin are low, data can be
read from the external SRAM.
IDT82V2608
INTERFACE
The SRAM interface has an 8-bit wide data bus, EMD[7:0], and a 19-
When both
SRAM INTERFACE
EM_WE pin and EM_CS pin are low, data can be written to the
Table-14 Maximum Delay Tolerance Value for Different SRAM Size in T1 Unchannelized Mode
Table-15 Maximum Delay Tolerance Value for Different SRAM Size in E1 Unchannelized Mode
SRAM Used
SRAM Used
(Kbyte)
(Kbyte)
512
256
128
512
256
128
64
32
16
64
32
16
8
4
2
8
4
2
Maximum Delay Tolerance
Maximum Delay Tolerance
17.58
13.25
6.625
(ms)
(ms)
8.79
4.39
2.20
1.10
26.5
3.31
1.66
0.83
281
141
212
106
70
35
53
29
When the minimum 2K byte memory is selected, only 11 address pins
will be used. Different memory size will affect different delay compensa-
tion capability.
delay tolerance in T1 and E1 unchannelized modes respectively.
The size of the SRAM can be selected from 2K byte to 512 Kbyte.
Table-14
Address Bus Used
Address Bus Used
and
EMA[18:0]
EMA[17:0]
EMA[16:0]
EMA[15:0]
EMA[14:0]
EMA[13:0]
EMA[12:0]
EMA[11:0]
EMA[10:0]
EMA[18:0]
EMA[17:0]
EMA[16:0]
EMA[15:0]
EMA[14:0]
EMA[13:0]
EMA[12:0]
EMA[11:0]
EMA[10:0]
Table-15
Inverse Multiplexing for ATM
show memory size vs. maximum
December 4, 2006