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XR-C587 Datasheet Preview

XR-C587 Datasheet

T1C PCM Repeater Chip Set

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~R
XR·C587 I C588
T 1C PCM Repeater Chip Set
GENERAL DESCRIPTION
The IC pair, XR-C587 and XR-C588, provides all the active
circuitry needed to form one side of a Tl C PCM Repea-
ter (3.152 MBits/sec). Each chip is packaged in a 16-Pin
CERDIP package, with an operating temperature range of
- 40°C to +85°C. The supply voltage range is 6.0 to 6.8
VDC' with a typical supply current for the pair of 16 mAo
The XR-C587 contains an amplifier, three AlBO ports, and
an npn transistor. The amplifier is a modified version of the
amplifier in Exar's XR-C262 Tl repeater chip. This ampli-
fier has its own ground pin for isolation, as well as for elim-
inating the amplifier current drain if only the XR-C587
AlBO diodes and/or the transistor are used. Each of the
three ALBO ports has a separate ground and one common
drive input. Any number, up to three, can be used while
eliminating current in any not used. The npn transistor is
provided for incidental uses.
The XR-C588 contains a preamplifier, an AlBO drive
output, a voltage reference, comparators, a clock recovery
circuit, ECl latches and two output drivers. The XR-C588
is a modified version of XR-C262 for T1C performance.
The amplifiers in the XR-C587 and XR-C588 are the same.
The clock driver output is modified to drive a crystal and
has higher gain. Both inputs to the clock amplifier are
available. The clock amplifier may be biased, both from the
center tap voltage (Pin 14). and the clock bias voltage
(Pin 7).
Two options for the clock comparator threshold voltage
are provided. Option 1 is 65% of AlBO threshold, and
Option 2 is 50% (the same as C262).
FEATURES
Modified Preamplifier with Improved Phase Margin
Separate Grounds for Preamplifier and AlBO Ports
Crystal Drive Capability for Hioh Q Operation
Optional Clock Comparator Threshold Levels (50% & 65%)
ABSOLUTE MAXIMUM RATINGS
Analog Supply Voltage
Digital Supply Voltage
Differential Input Voltage
Output Voltage
Storage Temperature
Operating Temperature
lead Soldering (10 seconds)
-0.5V to 10V
-0.5V to 10V
-5V to 5V
-0.5V to 20V
- 65°C to +150°C
-40°C to +85°C
300°C
FUNCTIONAL BLOCK DIAGRAMS
..MP
OUTPUT
AMP
INVERTING
INPUT
AMP
NONINVERTING
INPUT
AMP
GND
ALBO
DRIVE
INPUT
..LBOGND
AND
SUBSTRATE
ALBO
PORT'
GND
ALBO
PORT'
V.O
AMPLIFIER
OUTPUT
VZREF
ZENER VOLTAGE
PREAMP
INPUT
(-)
ANALOG
GROUND
PREAMP
INPUT
(-)
IADO
ALBO DRIVE
CURRENT
VeB
CLOCK BIAS
VOLTAGE
VCA
ANALOG
SUPPLY
Vcc
a.6
COLLECTOR
0<6
BASE
0<&
EMITTER
ALBO
PORT 3
..LIlO
PORT 3
OND
ALBO
PORT 2
ALBO
PORT 2
GND
-,
CLOCK
AMPLIFIER
INPUTS
--.J
VCT
AMPLIFIER BIAS
VOLTAGE
VCDO
CLOCK DRIVE
OUTPUT
VCD
DIGITAL
SUPPLY
-DATA
OUTPUT
DIGITAL
GROUND
+ DATA
OUTPUT
ORDERING INFORMATION
Part Number
XR-C587
XR-C588
Package
Ceramic
Ceramic
Operating Temperature
_450 C to +85° C
-45°C to +85°C
2-34




Exar

XR-C587 Datasheet Preview

XR-C587 Datasheet

T1C PCM Repeater Chip Set

No Preview Available !

XR·C587 I C588
ELECTRICAL CHARACTERISTICS - XR·C587/C588
Test Conditions: TA = -40°C to +85°C, at a supply voltage of VCC = 6.0V to 6.8V dc, Unless otherwise specified.
PARAMETERS
SUPPLY
Supply Voltage
Supply Current
ALBO Bias Current
MIN.
6.0
2.3
200
AMPLIFIER
DC open-loop gain
AC gain at 1 MHz
Corner Frequency
Input Offset Voltage
Input Bias Current
Output Sink Current
54
34
-15
300
ALBO
One Common Drive Input,
Three Ports, Each With Its
Own Ground
Max ALBO Current
2.5
TYP.
6.4
2.7
280
60
110
0
1
400
4.5
MAX.
6.8
3.3
360
68
+15
4
500
6
ALBO Current Mismatch
ALBO Port Voltage
ALBO OFF Impedance
-5
1.2V
10
SINGLE TRANSISTOR
Beta (~)
Leakage
75
0.01
0
1.45
150
1
+5
1.7V
400
5
UNIT
CONDITIONS
V dc
mA
mA
All ALBO Pins open VCC = 6.3V
ALBO Grounds open
ALBO drive pin at 3.5V (~ 5 VBE's)
dB 1V p-p output level, RL = 4 kn
dB returned to VCM = 2.7V
kHz
mV RS = 10 kn to both inputs
J.LA
J.LA
mA
%
V dc
kn
Total current to Ground through
all ALBO Ground Pins, Drive input
returned to VCC = ~.OV through
51 kn.
Measured with 1 mA nominal level
in each ALBO Ground Pin.
Two VBE above Ground,
1 mA in each Port.
Drive input and ALBO Ground Pins
Grounded Frequency = 1.5 MHz
VCE = 6.8V, IC = 100 mA
J.LA VCEO = 6.8V
2·35


Part Number XR-C587
Description T1C PCM Repeater Chip Set
Maker Exar
Total Page 6 Pages
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