
DS21455/DS21458 Quad T1/E1/J1 Transceivers
39 of 270
5.9 Packages
The package diagrams below show 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.
Figure 5-1. DS21455 Pin Diagram, 27mm BGA
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
A
RNEGI3
RFSYNC3
RLINK3
RCLKI3
DVSS
ESIBS13
TCLKO3
TPOSI3
DVDD
TSIG3
TSYSCLK3
RLCLK2
RLINK2
CS2
RCLKI2
RPOSO2
DVSS
TCHCLK2 TSYSCLK2
DVSS
B
RPOSO3
RPOSI3
DVDD
RCLKO3
CS3
DVDD
DVSS
TCHCLK3
DVSS
TCLK3
DVSS
DVDD
RCLK2
RPOSI2
RNEGO2
RSIG2
ESIBS12
TSSYNC2
TCLK2
TNEGO2
C
RSIG3
RNEGO3
EISBRD3
DVDD
TVSS
TLINK3
TSYNC3
TCLKI3
TPOSO3
TSER3
TCHBLK3
DVDD
EISBRD2
RCLKO2
RSIGF2
DVDD
TSER2
TSIG2
TPOSO2
TPOSI2
D
RSYNC3
RSIGF3
RLCLK3
RVSS
RVSS
TLCLK3
ESIBS03
TNEGI3
TNEGO3
TSSYNC3
TVDD
RSYNC2
RNEGI2
RCHCLK2
RSER2
RMSYNC2 RFSYNC2
DVDD
TCLKI2
TSYNC2
E
RLOS3
RSER3
RCLK3
RVDD
RLOS2
TCLKO2
TLINK2
TLCLK2
F
RLCLK1
RMSYNC3 RCHCLK3
BPCLK3
RSYSCLK2 ESIBS02
TNEGI2
TCHBLK2
G
RSYNC1
RLINK1
RSYSCLK3 RCHBLK3
RCHBLK2
TVSS
TVDD
DVDD
H
RSYSCLK1
RLOS1
DVSS
A5
BPCLK2
N.C.
RVSS
DVSS
J
RCHCLK1
RSER1
DVDD
EISBRD1
RVDD
RVSS
D1/AD1
ESIBS14
K
RSIGF1
LIUC/TPD
WR
RFSYNC1
CS4
RLCLK4
TSSYNC4
TSER4
L
RMSYNC1
RSIG1
RNEGO1
RPOSO1
A1
TCHCLK4
TSIG4
DVSS
M
BPCLK1
RCHBLK1
RCLKO1
RCLKI1
DVDD
RCLK4
TCLK4
DVDD
N
JTDI
RD
RCLK1
DVDD
DVSS
TSYSCLK4 TPOSO4
TNEGO4
P
RVDD1
BTS
CS1
A7/ALE
(AS)
RNEGI4
DVDD
TCLKO4
TCLKI4
R
TNEGI1
RVSS
RNEGI1
RPOSI1
RCLKI4
TSYNC4
TPOSI4
TNEGI4
T
MCLK1
RVSS
TNEGO1
A3
RCLKO4
TLCLK4
TLINK4
ESIBS04
U
INT
DVDD
A0
D7/AD7
D5/AD5
DVSS
D3/AD3
A6
D4/AD4
MUX
D0/AD0
RLINK4
EISBRD4
RCHCLK4
RPOSO4
TSTRST
RNEGO4
TVSS
TVDD
TCHBLK4
V
TSYNC1
A2
TLCLK1
D6/AD6
DVDD
TCLKI1
TPOSO1
A4
ESIBS11
TCHCLK1
RLOS4
RSYNC4
BPCLK4
RFSYNC4
RPOSI4
RSIGF4
N.C.
JTRST
JTDO
RVSS
W
TCHBLK1
TVDD
TPOSI1
TVSS
TLINK1
ESIBS01
TCLKO1
DVSS
TSER1
TSIG1
TSYSCLK1 TSSYNC1
JTMS
RSYSCLK4
D2/AD2
RMSYNC4
RSER4
RVDD
RVSS
MCLK2
Y
TTIP1
TRING1
TTIP2
TRING2
TTIP3
TRING3
TTIP4
TRING4
TCLK1
RTIP1
RRING1
RCHBLK4
RTIP2
RRING2
JTCLK
RTIP3
RRING3
RSIG4
RTIP4
RRING4
NOTE:
Locations C3, C13, J4, and U13 are used for the Extended System Information Bus (ESIB). These pin locations
on the DS21Q352, DS21Q354, DS21Q552, and DS21Q554 are connected to ground. When replacing a
DS21Qx5y with a DS21455, 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. Pins labeled as “N.C.” must be
unconnected.