MT90868 Zarlink Semiconductor, Inc., MT90868 Datasheet - Page 11

• Manufacturer Part Number: MT90868
• Description: High Bandwidth Digital Switch - 8,192 x 8,192 channels among local streams and 1,024 x 1,024 channels among two selected backplane streams
• Manufacturer: Zarlink Semiconductor, Inc.

Advance Information
Pin Description (continued)
AD24, AC24, AB26, AB25,
AB24, AA26, AA25, AA24,
V23, Y24, W24, V24, U23,
U24, T24, T23, R24, R23,
P23, P24, N24, N23, M24,
M23, L23, L24, K24, K23,
K22, J24, J23, H24, E26,
E25, E24, D26, D25, D24,
C26, C25, C24, C23, C22,
C21, B22, B21, A22, A21,
D20, D19, D18, C18, D17,
C17, D16, C16, D15, C15,
D14, C14, C13, D13, D12,
C12
PBGA Ball Number
AD20- AD23
AE24
AE23
AE22
AF24
AF23
AF22
AD7
LSTo0 - 63
LCSTo0 -
FP16o
Name
C16o
FP8o
FP4o
ODE
C8o
C4o
3
Local Serial Output Streams 0 to 63 (5V Tolerant Three-
state Outputs): These outputs have data rates of 8.192 Mb/s
with 128 channels per stream.
Local C16o Clock (3.3V Three-state Output): A 16.384MHz
clock output. The clock falling edge is aligned with the local
frame boundary.
Local C8o Clock (3.3V Three-state Output): A 8.192MHz
clock output. The clock falling edge is aligned with the local
frame boundary.
Local C4o Clock (3.3V Three-state Output): A 4.096MHz
clock output. The clock falling edge is aligned with the local
frame boundary.
Local ST-Bus Frame Pulse Output (3.3V Three-state
Output): Local port ST-BUS frame pulse output which is low
for 61ns at the frame boundary. Its frequency is 8KHz.
Local CT-Bus Frame Pulse Output (3.3V Three-state
Output): Local port ST-BUS frame pulse output which is low
for 122ns at the frame boundary. Its frequency is 8KHz.
Local ST-Bus Frame Pulse Output (3.3V Three-state
Output): Local port ST-BUS frame pulse output which is low
for 244ns at the frame boundary. Its frequency is 8KHz.
Local Tristate Control Streams 0 to 3 (3.3V Three-state
Outputs): These pins are used for per-channel external tristate
control of the local output streams. The bit rate is 16.384MHz.
When RESET pin or ODE pin is low, the LCSTo0 - 3 are driven
high.
Output Drive Enable (5V Tolerant Input): This is the
asynchronously output enable control for the BSTo0 - 63 and
LSTo0 - 63 serial outputs. When it is high, the BSTo0 - 63,
LSTo0 - 63 and LCSTo0-3 are enabled. When it is low, the
BSTo0 - 63 are tristated or driven high, the LSTo0 - 63 are
tristated and the LCSTo0 - 3 are driven high.
Description
MT90868
11