XECOM XE056J Datasheet
XECOM (1) XE056J
XE056J
7/99
Slim-Link R PLCC DAA for 56kBPS Data Transfer
Description
The XE056J is a complete DAA supporting 56 KBPS
data transfer in a compact, surface-mount package. It is
an alternative to discrete DAA’s for high-speed communications. The XE056J replaces 25 to 30 discrete
components with a single, assembled unit. The XE056J
package fits a 68 pin PLCC socket permitting automated,
high-volume assembly .
The XE056J does not sacrifice performance for small
size and surface-mount convenience. The wide bandwidth, low distortion design supports analog data transfer to 56 KBPS.
Like all Xecom DAA's the XE056J is a complete DAA.
It includes the telephone line transformer, loop current
holding circuit, hookswitch and ring indicator. The
XE056J complies with FCC Part 68 rules for direct
connection to the telephone line.
Features
* Modified 68-Pin PLCC package for high-volume
assembly
* Meets line interface requirements for reliable 56
Kbps modems;
* High Performance: Typical Total Harmonic
Distortion -85 dB ;
* FCC Part 68 Compliant;
* Integrated Low-Distortion T elephone Line
Transformer
* Ring Detection, active high and active low options
available;
* Operates on a Single +5 Volt or + 3 Volt Power
Supply;
* Solid-State Hookswitch Control, active high and
active low options available;
* Internal metallic surge protection provided;
* Extended Temperature Ranges available;
XE056J BLOCK DIAGRAM
Line Trans-
former
Line Current
Holding Cir-
cuit
Hookswitch
Ring De-
tector
T1
T2
OH
RI
Tip
Ring
metallic
surge sup-
pression
Low Imped-
ance Dialing
/MUTE
L1
L2
Billing Tone
Filter
(Optional)
XECOM (2) XE056J
XE056J Ordering Information
XE056J Mechanical Specifications
h x 45 degrees
(3 Places)
D2
b
e
D1
(top)
10
1
9
Index Corner
J x 45 degrees
D1
(bottom)
A
A1
D3
a
D
A 0.280 0.300 7.11 7.62
A1 0.020 REF 0.508 REF
b 0.017 0.021 0.432 0.533
D 0.985 0.995 25.02 25.27
D1 0.952 REF 24.18 REF
D2 0.800 REF 20.32 REF
D3 0.910 0.930 23.11 23.62
e 0.100 BSC 2.54 BSC
h 0.010 TYP 0.254 TYP
J 0.045 Typ 1.15 TYP
a45
o
TYP 45o TYP
Coplanarity 0.004 Max 0.10 Max
Inches Millimeters
Dim Min Max Min Max
The standard version of the XE056J is the XE056JLHGU. The L indicates that the off-hook control is an active
low; the H indicates that the Ring Indicate output is an active high; the G indicates General Purpose feature set,
and the U indicates the North American country configuration.
There are a number of variations of the XE056J which can be provided on special order. We offer a choice in the
polarity of the Ring Indicate and Off-Hook signals plus variations for many different countries. We also anticipate
adding many new features and options in future versions of this product. Please contact your Xecom sales representative for the correct model number when ordering any of these special versions of the XE056J.
XECOM (3) XE056J
XE056J Pin Descriptions
18
17
16
15
14
13
12
11
10
RI
N/C
N/C
T1
T2
Mute
OH
VCC
Gnd
N/C
Ring
Tip
N/C
L1 (Opt)
L2 (Opt)
N/C
N/C
N/C
XE056J
(top)
1
2
3
4
5
6
7
8
9
Figure 4: XE056J Pin Configuration
Pin Name Description
1 N/C No Connection
2 Ring Ring is one wire of the two-wire telephone line
connection (RJ11 Pin 4). FCC Part 68 Rules
require a 1500 volt isolation barrier between
the telephone line and all other circuits. This
isolation must be preserved throughout the
system. Xecom recommends 0.100 inch
spacing between traces connected to Ring and
all other conductors to preserve this isolation.
3 Tip Tip is one wire of the two-wire telephone line
connection (RJ11 Pin 3). The telephone
company places a DC "Battery" voltage across
Tip and Ring on all public switched telephone
lines. The XE056J accept this line battery
voltage without regard to its polarity.
4 N/C No Connection
5, 6 L2 L1 and L2 provide the points to connect a five
millihenry inductor. This inductor completes
the 16 KHz German billing tone filter.
7-9 N/C No Connection
10 GND Ground connection to the XE056J. This signal
provides the reference for the OH output and RI
input. This pin should be connected to the
systems digital ground.
11 VCC +5 or +3 Volt power source for the XE056J.
VCC powers the RI and OH control lines.
Pin Name Description
12 OH Switch-hook control to the modem. OH is
normally an active low input. OH is available
as an active high input by special order.
Activating OH closes the switch-hook causing
the XE056J to seize the local telephone line.
The telephone line connection is dropped when
OH is deactivated.
The host can pulse OH to simulate rotary
dialing. The pulse rate in the US is ten pulses
per second. Each digit is dialed as a series of
pulses created by closure of the hook-switch.
(one pulse for the digit one to ten pulses for the
digit zero) The pulses must be asymmetrical so
that the hook-switch is closed for thirty-one
milliseconds and open for sixty-nine
milliseconds. An inter-digit delay of at least
one hundred milliseconds is required.
13 Mute Mute is an optional signal on the XE056J.
Countries which require low impedance
dialing, such as Italy, use the Mute signal to
pulse dial.
14 T2 T2 in conjunction with T1 provides the
differential input/output for the analog signal.
T2 connects directly to the secondary side of
the line transformer embedded into the
XE056J. To match the impedance of the DAA
to the 600 ohm telephone line, a 280 ohm
resistor is required on T1 or T2.
15 T1 T1 in conjunction with T2 provides the
differential input/output for the analog signal.
T1 connects directly to the secondary side of
the line transformer embedded into the
XE056J. To match the impedance of the DAA
to the 600 ohm telephone line, a 280 ohm
resistor is required on T1 or T2.
16-17 N/C No Connection
18 RI Ring Indicate output from the modem. RI is
normally active high. RI is available as an active low output by special order. RI provides
a square wave representation of the Ring signal present across Tip and Ring. This permits
intelligent monitoring of the incoming ring.
The XE056J recognizes ring voltages of thirtyeight to one hundred fifty volts RMS in the
frequency range of sixteen to sixty-eight
Hertz.
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