DS21Q55N Maxim Integrated Products, DS21Q55N Datasheet - Page 29

• Manufacturer Part Number: DS21Q55N
• Description: Framer E1/J1/T1 3.3V 256-Pin BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55N

• Package: 256BGA
• Number Of Transceivers: 4
• Standard Framing Format: E1|J1|T1
• Maximum Supply Current: 75(Typ) mA
• Minimum Single Supply Voltage: 3.135 V
• Maximum Single Supply Voltage: 3.465 V

2.7 Pinout
The DS21Q55 is available in a 256-pin, 27mm, 1.27-pitch BGA package.
Table 2-A. Pin Description Sorted by Pin Number
NOTE: Signal is common to all transceivers unless otherwise stated.
W15
M17
M20
PIN
H17
V13
A14
K17
U11
B12
C12
C16
D18
G20
L17
M1
J19
U3
V2
V8
H4
U8
U7
U9
U5
V4
U4
N4
U2
V5
A9
C4
T4
B5
B3
B6
P4
F4
P2
P3
J3
A7/ALE (AS)
BPCLK1
BPCLK2
BPCLK3
BPCLK4
D0/AD0
D1/AD1
D2/AD2
D3/AD3
D4/AD4
D5/AD5
D6/AD6
D7/AD7
DVDD1
DVDD1
DVDD1
DVDD1
DVDD2
DVDD2
DVDD2
DVDD2
DVDD3
DVDD3
DVDD3
DVDD3
DVDD4
DVDD4
DVDD4
NAME
BTS
CS1
CS2
CS3
CS4
A0
A1
A2
A3
A4
A5
A6
TYPE
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
O
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
I
I
I
I
I
I
I
I
I
I
I
I
I
Address Bus Bit 0 (lsb)
Address Bus Bit 1
Address Bus Bit 2
Address Bus Bit 3
Address Bus Bit 4
Address Bus Bit 5
Address Bus Bit 6
Address Bus Bit 7 (msb) / Address Latch Enable
Back Plane Clock, Transceiver # 1
Back Plane Clock, Transceiver # 2
Back Plane Clock, Transceiver # 3
Back Plane Clock, Transceiver # 4
Bus Type Select (0 = Intel/1 = Motorola)
Chip Select, Transceiver # 1
Chip Select, Transceiver # 2
Chip Select, Transceiver # 3
Chip Select, Transceiver # 4
Data Bus Bit 0/ Address/Data Bus Bit 0 (lsb)
Data Bus Bit 1/ Address/Data Bus Bit 1
Data Bus Bit 2/Address/Data Bus Bit 2
Data Bus Bit 3/Address/Data Bus Bit 3
Data Bus Bit 4/Address/Data Bus Bit 4
Data Bus Bit 5/Address/Data Bus Bit 5
Data Bus Bit 6/Address/Data Bus Bit 6
Data Bus Bit 7/Address/Data Bus Bit 7 (msb)
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
Digital Positive Supply
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