DS2141A Datasheet, PDF (1/39 Pages) Dallas Semiconductor – T1 Controller

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FEATURES
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
DS2141A
T1 Controller
PIN ASSIGNMENT
TCLK 1
TSER ₂
TCHCLK 3
TPOS 4
TNEG 5
AD0 6
AD1 7
AD2 8
AD3 9
AD4 10
AD5 11
AD6 ¹²
AD7 ¹³
BTS 14
RD(DS) 15
CS 16
ALE(AS) 17
WR(R/W) ¹⁸
RLINK ¹⁹
VSS 20
40 VDD
39 TSYNC
38 TLINK
37 TLCLK
36 ^INT1
35 INT2
34 RLOS/LOTC
33 TCHBLK
32 RCHBLK
31 LI CS
30 ^{LI CLK}
29 _{LI SDI}
28 SYSCLK
27 RNEG
26 RPOS
25 RSYNC
24 ^RSER
23 _RCHCLK
22 RCLK
21 RLCLK
40-Pin DIP (600-mil)
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
BTS
RD(DS)
NC
6 5 4 3 2 1 44 43 42 41 40
7
39
8
38
9
37
10
36
11
35
12
44-PIN PLCC
34
13
33
14
32
15
31
16
30
17
29
18 19 20 21 22 23 24 25 26 27 28
RLOS/LOTC
TCHBLK
RCHBLK
LI_CS
LI_CLK
LI_SDI
NC
NC
SYSCLK
RNEG
RPOS
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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