DS21348 Dallas Semiconducotr, DS21348 Datasheet - Page 6

no-image

DS21348

Manufacturer Part Number
DS21348
Description
3.3V E1/T1/J1 Line Interface
Manufacturer
Dallas Semiconducotr
Datasheet

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DS21348G
Manufacturer:
DS
Quantity:
837
Part Number:
DS21348G
Manufacturer:
Maxim Integrated
Quantity:
10 000
Part Number:
DS21348G
Manufacturer:
NXP/恩智浦
Quantity:
20 000
Part Number:
DS21348G+
Manufacturer:
Maxim Integrated
Quantity:
10 000
Part Number:
DS21348G+
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
DS21348GN
Manufacturer:
Maxim Integrated
Quantity:
10 000
Company:
Part Number:
DS21348GN
Quantity:
80
Part Number:
DS21348GN+
Manufacturer:
Maxim Integrated
Quantity:
10 000
Part Number:
DS21348GN-C01
Manufacturer:
Maxim Integrated
Quantity:
10 000
Part Number:
DS21348T
Manufacturer:
DALLAS
Quantity:
188
Part Number:
DS21348T
Manufacturer:
DALLAS
Quantity:
13
Part Number:
DS21348T
Manufacturer:
DALLAS
Quantity:
20 000
Part Number:
DS21348T
Quantity:
63
Part Number:
DS21348T+
Manufacturer:
MAXIM
Quantity:
612
Part Number:
DS21348T+
Manufacturer:
MAXIM/美信
Quantity:
20 000
Part Number:
DS21348TN
Manufacturer:
DALLAS
Quantity:
5 530
DS21348/Q348
3. INTRODUCTION
The analog AMI/HDB3 waveform off of the E1 line or the AMI/B8ZS waveform off of the T1 line is
transformer coupled into the RTIP and RRING pins of the DS21348. The user has the option to use
internal termination, software selectable for 75Ω/100Ω/120W applications, or external termination. The
device recovers clock and data from the analog signal and passes it through the jitter attenuation MUX
outputting the received line clock at RCLK and bipolar or NRZ data at RPOS and RNEG. The DS21348
contains an active filter that reconstructs the analog received signal for the nonlinear losses that occur in
transmission. The receive circuitry is also configurable for various monitor applications. The device has a
usable receive sensitivity of 0dB to -43dB for E1 and 0dB to -36dB for T1, which allows the device to
operate on 0.63mm (22AWG) cables up to 2.5km (E1) and 6k feet (T1) in length. Data input at TPOS and
TNEG is sent via the jitter attenuation mux to the waveshaping circuitry and line driver. The DS21348
will drive the E1 or T1 line from the TTIP and TRING pins via a coupling transformer. The line driver
can handle both CEPT 30/ISDN-PRI lines for E1 and long haul (CSU) or short haul (DSX-1) lines for T1.
3.1
DOCUMENT REVISION HISTORY
1) Datasheet for 3.3V only, 011801.
Added supply current measurements; added thermal characteristics of quad package, 092101.
2)
6 of 73

Related parts for DS21348