T8207-BAL-DT Agere Systems, Inc., T8207-BAL-DT Datasheet - Page 15

• Manufacturer Part Number: T8207-BAL-DT
• Description: CelXpres ATM interconnect. Dry-bagget, tape & reel .
• Manufacturer: Agere Systems, Inc.

Advance Data Sheet
September 2001
Agere Systems Inc.
2
Table 3. SDRAM Interface Pins
sd_a[11:0]
sd_d[15:0]
sd_bs[1:0]
Symbol
sd_cas*
sd_ras*
sd_we*
sd_iref
sd_clk
Pin Description
F19, E20, G17,
E17, D18, C19,
B20, C18, B19,
K20, K19, K18,
F18, E19, D20,
E18, D19, C20
L19, L18, L20,
K17, J20, J19,
J18, J17, H20
H18, G20
Ball
G19
G18
H19
A20
F20
A19
(continued)
Reset
Value
—
X
Z
X
Z
1
1
1
Type
I/O
I/O
O
O
O
O
O
I
SDRAM Address Lines. 7 mA drive, TTL compatible out-
put. These buffers are 50
Long printed-wiring board traces should have 50
impedance.
SDRAM Data Lines. 7 mA drive, TTL compatible I/O. These
buffers are 50
wiring board traces should have 50
SDRAM Bank Selects. 7 mA drive, TTL compatible output.
These buffers are 50
printed-wiring board traces should have 50
impedance.
SDRAM Row Address Select (Active-Low). 7 mA drive,
TTL compatible output. This buffer is a 50
matching buffer. Long printed-wiring board traces should
have 50
SDRAM Column Address Select (Active-Low). 7 mA
drive, TTL compatible output. This buffer is a 50
ance matching buffer. Long printed-wiring board traces
should have 50
SDRAM Write Enable (Active-Low). 7 mA drive, TTL com-
patible output. This buffer is a 50
buffer. Long printed-wiring board traces should have 50
nominal impedance.
SDRAM Clock. 7 mA drive, TTL compatible output. This
buffer is a 50
wiring board traces should have 50
SDRAM Current Reference. Precision current reference for
SDRAM buffers. A 1 k , 1% resistor must be connected
between this pin and GND.
nominal impedance.
impedance matching buffer. Long printed-
impedance matching buffers. Long printed-
nominal impedance.
Name/Description
impedance matching buffers. Long
impedance matching buffers.
impedance matching
ATM Interconnect
nominal impedance.
nominal impedance.
CelXpres T8207
impedance
nominal
imped-
nominal
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