DS21Q55 Maxim Integrated Products, DS21Q55 Datasheet - Page 35

• Manufacturer Part Number: DS21Q55
• Description: IC TXRX QUAD T1/E1/J1 SCT 256BGA
• Manufacturer: Maxim Integrated Products

Specifications of DS21Q55

• Function: Transceiver
• Interface: E1, J1, T1
• Number Of Circuits: 4
• Voltage - Supply: 3.14 V ~ 3.47 V
• Current - Supply: 75mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 256-BGA
• Includes: BERT Generator and Detector, Dual HDLC Controllers
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power (watts): -

W
2.8 Package
Figure 2-1. DS21Q55 Pin Diagram, 27mm BGA
The diagram shown below is the lead pattern that will be placed on the target PC board. This is the same
pattern that would be seen as viewed from the top.
G
M
A
B
C
D
E
H
K
N
P
R
U
V
Y
F
J
L
T
RSYSCLK1
Note: Locations C3, C13, J4, and U13 are used for the Extended System Information Bus (ESIB). These pin locations on
RCHCLK1
RMSYNC1
TCHBLK1
RPOSO3
RSYNC3
RSYNC1
TSYNC1
RNEGI3
RLCLK1
RSIGF1
BPCLK1
TNEGI1
RVDD1
RLOS3
MCLK1
RSIG3
TTIP1
JTDI
INT
1
RMSYNC3 RCHCLK3
RFSYNC3
RCHBLK1
the DS21Q352, DS21Q354, DS21Q552, and DS21Q554 are connected to ground. When replacing a DS21Qx5y
with a DS21Q55B, these signals should be routed to control logic to gain access to the ESIB. If these pins remain
connected to ground, the ESIB function will be disabled.
RNEGO3
RPOSI3
RSIGF3
RLINK1
TRING1
RSER3
RLOS1
RSER1
RVSS1
RVSS1
DVDD1
TVDD1
RSIG
LIUC
BTS
RD
2
A2
1
RSYSCLK
EISBRD3
RNEGO1
RCLKO1
TNEGO1
RLCLK3
RNEGI1
RLINK3
TLCLK1
TPOSI1
DVDD3
RCLK3
DVSS1
DVDD1
RCLK1
TTIP2
CS1
WR
3
A0
3
RFSYNC1
RCHBLK3
EISBRD1
RPOSO1
RCLKO3
BPCLK3
RPOSI1
TRING2
RCLKI3
DVDD3
RVDD3
RCLKI1
DVDD1
A7/ALE
D7/AD7
D6/AD6
RVSS3
TVSS1
(AS)
4
A5
A3
D5/AD5
DVSS3
RVSS3
DVDD1
TLINK1
TVSS3
TTIP3
CS3
5
ESIBS13
ESIBS01
TLCLK3
TRING3
DVDD3
TLINK3
TCLKI1
DVSS1
6
TCLKO3
TSYNC3
ESIBS03
TPOSO1
TCLKO1
D3/AD3
TTIP4
DVSS3
7
TCHCLK3
TPOSI3
TNEGI3
TRING4
TCLKI3
DVSS1
8
A6
A4
TPOSO3
TNEGO3
ESIBS11
D4/AD4
DVDD3
DVSS3
TSER1
TCLK1
9
35 of 237
TSSYNC3
TCHCLK1
TCLK3
TSER3
TSIG3
TSIG1
10
RTIP1
MUX
TSYSCLK
TCHBLK3
TSYSCLK
RRING1
D0/AD0
DVSS2
TVDD3
RLOS4
11
3
1
TSSYNC1
RCHBLK4
RSYNC4
RLCLK2
RSYNC2
DVDD2
DVDD2
RLINK4
12
EISBRD2
EISBRD4
BPCLK4
RLINK2
RNEGI2
RCLK2
RTIP2
13
JTMS
RCHCLK2
RCHCLK4
RFSYNC4
RSYSCLK
RCLKO2
RRING2
RPOSI2
14
CS2
4
RNEGO2
RPOSO4
RSIGF2
RPOSI4
RCLKI2
RSER2
D2/AD2
JTCLK
15
RMSYNC2 RFSYNC2
RMSYNC4
RPOSO2
TSTRST
RSIGF4
DVDD2
RSIG2
RTIP3
16
RSYSCLK
RCHBLK2
ESIBS12
RCLKO4
RNEGO4
BPCLK2
RRING3
RNEGI4
RCLKI4
DVSS2
TSER2
RLOS2
RVDD2
DVDD4
DVSS4
RSER4
17
CS4
N.C.
A1
2
TCHCLK2
TSSYNC2
TCHCLK4
TCLKO2
ESIBS02
TSYNC4
RLCLK4
TLCLK4
DVDD4
JTRST
RVDD4
DVDD2
TVSS2
RVSS2
RCLK4
TVSS4
TSIG2
RSIG4
18
TSYS
CLK4
N.C.
TSYSCLK
TSSYNC4
TPOSO2
TPOSO4
TCLKO4
TNEGI2
TCLKI2
TLINK2
D1/AD1
TPOSI4
TLINK4
TCLK2
TVDD2
RVSS2
TCLK4
TVDD4
RVSS4
TSIG4
RTIP4
19
JTDO
2
TCHBLK2
TCHBLK4
TNEGO2
ESIBS14
TNEGO4
ESIBS04
TSYNC2
TPOSI2
TLCLK2
TNEGI4
RRING4
DVSS2
DVDD4
DVSS4
DVSS4
DVDD4
TCLKI4
RVSS4
MCLK2
TSER4
20