bbt3821 Intersil Corporation, bbt3821 Datasheet - Page 57

• Manufacturer Part Number: bbt3821
• Description: Octal Multi-rate Lx4/cx4 - Xaui Re-timer
• Manufacturer: Intersil Corporation

Note (1): Active level of these pins is controlled by register 1.49181 (1.C01D’h), see Table 55. If unused, the TX_ENC pin can be tied high, and the register bit not
Note (2): Active level of this pin is controlled by register 1.49170 (1.C012’h), see Table 49. Otherwise Note 1 applies.
D9
B5
B6
T5
R5
P9
P8
C7
R6
P7
N7
N6
P6
C6, C13, H13, J4, N5, N13
A4, A8, A9, A12, A13, B10, N9,
P4, P5
B4, C4, C14, D4, D13, E4, E13,
F4, F13, G4, G13, K4, K13, L4,
L13, M4, M13, N4, P13, R4, R13,
T4, T13
R7, T7
R10, T10
A1, A14, A15, A16, B1, B2, B3,
B8, B13, B16, C1, C9, C11, C15,
C16, D1, D2, D3, D16, E1, E14,
E15, E16, F1, F2, F3, F16, G1,
G14, G15, G16, H1, H2, H3, H4,
H16, J1, J13, J14, J15, J16, K1,
K2, K3, K16, L1, L14, L15, L16,
M1, M2, M3, M16, N1, N14, N15,
N16, P1, P2, P3, P16, R1, R8,
R9, R14, R15, R16, T1, T2, T3,
T6, T16
PIN#
PIN#
altered. Other unused input pins should be tied low, and the corresponding register bit not altered, so the default value of the register will allow Byte Synch and
cause a ‘No Fault’ indication in the LASI alarm status registers on RESET. See also Table 12, Table 27 and Table 28.
TX_ENC
TX_ENA[3]
TX_ENA[2]
TX_ENA[1]
TX_ENA[0]
PIN#
SDA
SCL
WRTP
GPIO[4]
GPIO[3]
GPIO[2]
GPIO[1]
GPIO[0]
NAME
(1)
NAME
(1)
(1)
(1)
(1)
Input
Output (open drain)
57
VDDPR
VDD
VDDA
VDDAV
VDDAC
GNDA
NAME
TYPE
I/O (open drain)
I/O (open drain)
Input
I/O (open drain)
Table 100. I
Table 99. MISCELLANEOUS PINS (Continued)
Supply
Supply
Analog Supply
Analog Supply
Analog Supply
Ground
TYPE
Table 101. VOLTAGE SUPPLY PINS
Transmit enable input from XENPAK module input “TX ON/OFF”. Controls TX_ENA[3:0].
For normal operation, should be pulled active (default up). 1.2V CMOS
Transmit Laser Driver Enables. They are set active only when TX_ENC pin is active and
the corresponding bits in register 1.9 are set low. During RESET stage, these pins are
always low. 1.5V CMOS, 2.5V compatible.
2
C 2-WIRE SERIAL DATA INTERFACE PINS
TYPE
BBT3821
I
I
I
XENPAK basic NVR area is allowed. 1.5V CMOS, 2.5V Tolerant
General Purpose I/O Can be used for optical monitoring and status
reporting, and to trigger LASI, or for external control functions. 1.5V CMOS,
2.5V Tolerant and Compatible
2
2
2
2.5V Protection Voltage Supply. May be same level as VDD if no inputs
or outputs go above the VDD level.
1.5V Digital and Core Supply
1.5V Analog Supply. Should be decoupled from VDD
Analog supply for VCO. Should be decoupled from VDDA
Analog supply for CMU. Should be decoupled from VDDA
Ground. Electrically well grounded. Analog and Digital grounds are tied in
the device, but it is recommended that some separation be provided in the
PCB planes outside the device, to minimize the coupling between digital
signals and the analog sections of the device.
C Serial Address/Data I/O 1.5V CMOS, 2.5V Tolerant and Compatible
C Serial Interface Clock. 1.5V CMOS, 2.5V Tolerant and Compatible
C Serial Interface Write Protection. When high, no write to protected
DESCRIPTION
DESCRIPTION
DESCRIPTION