DS2141A
T1 Controller
www.dalsemi.com
FEATURES
PIN ASSIGNMENT
DS1/ISDN-PRI framing transceiver
Frames to D4, ESF, and SLC-96 formats
Parallel control port
Onboard, dual two-frame elastic store slip
buffers
Extracts and inserts robbed-bit signaling
Programmable output clocks
Onboard FDL support circuitry
5V supply; low-power CMOS
Available in 40-pin DIP and 44-pin PLCC
(DS2141Q)
Compatible with DS2186 Transmit Line
Interface, DS2187 Receive Line Interface,
DS2188 Jitter Attenuator, DS2290 T1
Isolation Stik, and DS2291 T1 Long Loop
Stik
TCLK
TSER
TCHCLK
TPOS
TNEG
AD0
AD1
AD2
AD3
AD4
AD5
AD6
1
2
3
4
5
6
7
8
9
10
11
12
40
39
38
37
36
35
34
33
32
31
30
29
VDD
TSYNC
AD7
13
28
SYSCLK
BTS
RD(DS)
CS
ALE(AS)
WR(R/W)
14
27
15
16
17
18
26
25
24
23
RNEG
RPOS
RSYNC
RSER
RLINK
19
22
RCLK
VSS
20
21
RLCLK
TLINK
TLCLK
INT1
INT2
RLOS/LOTC
TCHBLK
RCHBLK
LI CS
LI CLK
LI SDI
RCHCLK
TNEG
TPOS
TCHCLK
TSER
TCLK
VDD
TSYNC
TLINK
TLCLK
INT1
INT2
40-Pin DIP (600-mil)
7
41 40
39
8
6
5
4
3
2
1
44
43
42
38
9
37
10
36
11
35
44-PIN PLCC
12
34
13
33
14
32
15
31
30
16
17
18
19
20
21
22
23
24
25
26
27
29
28
RLOS/LOTC
TCHBLK
RCHBLK
LI_CS
LI_CLK
LI_SDI
NC
NC
SYSCLK
RNEG
RPOS
NC
CS
ALE(AS)
WR(R/W)
RLINK
VSS
RLCLK
RCLK
RCHCLK
RSER
RSYNC
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
BTS
RD(DS)
NC
DESCRIPTION
The DS2141A is a comprehensive, software-driven T1 framer. It is meant to act as a slave or coprocessor
to a microcontroller or microprocessor. Quick access via the parallel control port allows a single micro to
handle many T1 lines. The DS2141A is very flexible and can be configured into numerous orientations
via software. The software orientation of the device allows the user to modify their design to conform to
future T1 specification changes. The controller contains a set of 62 8-bit internal registers which the user
can access. These internal registers are used to configure the device and obtain information from the T1
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