GENLINX
™
II
GS9025
Serial Digital Receiver
PRELIMINARY DATA SHEET
FEATURES
• SMPTE 259M compliant
• operational to 540Mb/s
• automatic cable equalization (typically greater than
350m of high quality cable at 270Mb/s)
• adjustment-free operation
• auto-rate selection (5 rates) with manual override
• single external VCO resistor for operation with five
input data rates
• data rate indication output
• system friendly: serial data outputs muted and serial
clock remains active when input data is lost
• operation independent of SAV/EAV sync signals
• signal strength indicator output
• output 'eye' monitor (OEM) with large signal amplitude
and power down option
• carrier detect with programmable threshold level
• power savings mode (output serial clock disable)
• 44 pin MQFP
APPLICATIONS
Cable equalization plus clock and data recovery for all high
speed serial digital interface applications involving SMPTE
259M and other data standards.
ORDERING INFORMATION
PART NUMBER
GS9025-CQM
GS9025-CTM
A/D
DDI
DDI
ANALOG
DIGITAL
MUX
CARRIER DETECT
PHASELOCK
HARMONIC
LOGIC
MUTE
SDO
SDI
SDI
+
-
-
DESCRIPTION
The GS9025 provides automatic cable equalization and
high performance clock and data recovery for serial digital
signals. The GS9025 receives either single-ended or
differential serial digital data and outputs differential clock
and retimed data signals at PECL levels (800mV). The on-
board cable equalizer provides up to 40dB of gain at
200MHz which typically results in equalization of greater
than 350m of high quality cable at 270Mb/s.
The GS9025 operates in either auto or manual data rate
selection mode. In both modes, the GS9025 requires only
one external resistor to set the VCO centre frequency and
provides adjustment free operation.
The GS9025 has dedicated pins to indicate signal
strength/carrier detect, LOCK and data rate. Optional
external resistors allow the carrier detect threshold level to
be customized to the user's requirement. In addition, the
GS9025 provides an 'Output Eye Monitor' (OEM) which
allows the verification of signal integrity after equalization,
prior to reslicing. The serial clock outputs can be disabled
to reduce power consumption. The GS9025 operates from a
single +5 or -5 volt supply.
GS9025
PACKAGE
44 pin MQFP Tray
44 pin MQFP Tape
COSC
TEMPERATURE
0°C to 70°C
0°C to 70°C
LOCK
VARIABLE
GAIN EQ
STAGE
FREQUENCY
ACQUISITION
PHASE
DETECTOR
SDO
CLK_EN
SCO
SCO
OEM
EYE
MONITOR
DIVISION
AUTO EQ
CONTROL
CHARGE
PUMP
3 BIT
COUNTER
SMPTE
AUTO/MAN
SS0
SS1
SS2
+
-
AGC CAP CD_ADJ
SSI/CD
VCO
DECODER
LF+ LFS LF-
CBG R
VCO
BLOCK DIAGRAM
Revision Date: November 2000
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: info@gennum.com
www.gennum.com
Document No. 521 - 63 - 05
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Voltage (V
S
)
Input Voltage Range (any input)
Operating Temperature Range
Storage Temperature Range
Lead Temperature (soldering, 10 sec)
VALUE
5.5V
V
CC
+0.5 to V
EE
-0.5V
0°C
≤
T
A
≤
70°C
GS9025
-65°C
≤
T
S
≤
150°C
260°C
DC ELECTRICAL CHARACTERISTICS
V
CC
= 5.0v, V
EE
= 0V, T
A
= 0°C to 70°C unless otherwise shown.
PARAMETER
Supply Voltage
Supply Current
SYMBOL
V
CC
Ι
S
CONDITIONS
MIN
4.75
TYP
5.0
115
125
135
145
2.5
0.4 to 4.6
MAX
5.25
-
-
-
-
-
V
CC
-(V
DIFF
/2)
UNITS
V
mA
mA
mA
mA
V
V
NOTES
TEST
LEVEL
1
1
1
1
1
1
CLK_EN = 0
CLK_EN = 1
CLK_EN = 0,
OEM active
CLK_EN = 1,
OEM active
-
-
-
-
-
V
EE
+(V
DIFF
/2)
SDI/SDI Common Mode
Voltage
DDI/DDI Common
Mode Input Voltage
Range
DDI/DDI Differential
Drive
AGC+/AGC- Common
Mode Voltage
OEM Bias Potential
SSI/CD Output Current
V
SSI/CD
= 2.4V
V
SSI/CD
= 0.4V (Muted)
AUTO/MAN,
SMPTE,
SS[2:0] Input
Voltage
CLK_EN Input
Voltage
High
Low
1
1
200
-
-
-
-
2.0
-
800
2.7
4.5
+120
-1.0
-
-
2000
-
-
-
-
-
0.8
mV
V
V
µA
mA
V
V
3
1
1
3
1
High
Low
2.5
-
500
4.4
-
Auto Mode
180
-
-
-
4.7
0.2
300
-
0.8
-
-
0.4
-
V
V
µA
V
V
µA
3
4
3
1
LOCK Output Sink
Current
SS[2:0] Output
Voltage
High
Low
1
1
SS[2:0] Source Current
1
2
GENNUM CORPORATION
521 - 63 - 05
DC ELECTRICAL CHARACTERISTICS (Continued)
V
CC
= 5.0v, V
EE
= 0V, T
A
= 0°C to 70°C unless otherwise shown.
PARAMETER
SS[2:0] Sink Current
SS[2:0] Source Current
SS[2:0] Sink Current
NOTES
SYMBOL
CONDITIONS
Auto Mode
Manual Mode
Manual Mode
MIN
0.6
-
-
TYP
1
-
0.8
TEST LEVELS
MAX
-
0
5
UNITS
mA
µA
µA
NOTES
3
3
3
TEST
LEVEL
1
1
1
GS9025
1. V
DIFF
is the differential input signal swing.
2. See DESCRIPTION.
3. Pins SS[2:0] are outputs in AUTO mode and inputs in MANUAL mode.
4. LOCK is an open collector output and requires an external pullup resistor.
1. 100% tested at 25°C.
2. Guaranteed by design.
3. Inferred or correlated value.
AC ELECTRICAL CHARACTERISTICS
V
CC
= 5.0V, V
EE
= 0V, T
A
= 0°C to 70°C unless otherwise shown. R
LF
= 1kΩ, C
LF1
= 15nF, C
LF2
= 5.6pF
PARAMETER
Data Rate
Maximum Equalizer Gain
Additive Jitter
SYMBOL
CONDITIONS
MIN
143
TYP
-
40
300
275
-
-
MAX
540
-
-
-
0.1
±15
-
-
-
-
1000
200
400
UNITS
Mb/s
dB
ps p-p
ps p-p
dB
%
µs
ms
ms
ms
mVp-p
ps
ps
NOTES
TEST
LEVELS
1
at 200MHz
t
J
270Mb/s, 300m
540Mb/s, 100m
-
-
-
-
see Figs
7-11
1
Jitter Transfer Function
Peaking
Frequency Drift when PLL
loses lock
Lock Time Synchronous
Switch
t
SWITCH
< 0.5µs,
270Mb/s
0.5µs<t
SWITCH
<10ms
t
SWITCH
> 10ms
Lock Time Asynchronous
Switch
SDO/SDO, SCO/SCO Output
Signal Swing
SDO to SCO Synchronization
SDO/SDO, SCO/SCO Rise &
Fall Times
NOTES
20 - 80%, T
A
=25°C
75Ω DC Load
2
2
1
2
-
-
-
-
600
-200
200
1
1
4
10
800
0
300
2
3
2
1
2
2
TEST LEVELS
1. 100% tested at 25°C.
2. Guaranteed by design.
3. Inferred or correlated value.
4. Evaluated using test setup Figure 1.
1. Synchronous switching refers to switching the input data from one source to another
source which is at the same data rate (ie: line 10 switching for component NTSC).
2. Asynchronous switching refers to switching the input data from one source to another
source which is at a different data rate.
3. Assuming 75Ω pullup resistors on SDO/SDO and SCO/SCO.
DATA
TEKTRONIX
GigaBERT
1400
TRANSMITTER
DATA
GS9028
CABLE
DRIVER
BELDEN 8281
CABLE
EB9025
BOARD
TEKTRONIX
GigaBERT
1400
ANALYZER
TRIGGER
CLOCK
Fig. 1 Test Setup for Figures 6 - 11
3
GENNUM CORPORATION
521 - 63 - 05
PIN CONNECTIONS
V
CC
_75
SMPTE
SSI/CD
COSC
CLK_EN
LOCK
OEM
44
DDI
DDI
V
CC
_75
V
CC
V
EE
SDI
SDI
V
CC
V
EE
CD_ADJ
AGC-
1
2
3
4
5
6
7
8
9
10
11
12
43
42
41
40
39
38 37
V
EE
A/D
36
35 34
33
32
31
30
V
EE
SDO
SDO
V
EE
SCO
SCO
V
EE
AUTO/MAN
SS0
SS1
SS2
V
CC
V
EE
GS9025
GS9025
TOP VIEW
29
28
27
26
25
24
23
13
14
15
16
17
18 19
20
21 22
AGC+
LFS
LF-
R
VCO
CBG
V
CC
V
EE
LF+
PIN DESCRIPTIONS
NUMBER
1, 2
3, 44
4, 8, 13, 22, 35
5, 9, 14, 18, 27,
30, 33, 34, 37
6, 7
10
11, 12
15
16
17
19
20
21
23, 24, 25
SYMBOL
DDI/DDI
V
CC
_75
V
CC
V
EE
SDI/SDI
CD_ADJ
AGC-, AGC+
LF+
LFS
LF-
R
VCO
_RTN
R
VCO
CBG
SS[2:0]
TYPE
I
I
I
I
DESCRIPTION
Digital data inputs (Differential ECL/PECL).
Power supply connection for internal 75Ω pullup resistors connected to DDI/DDI.
Most positive power supply connection.
Most negative power supply connection.
I
I
I
I
I
I
I
I
I
I/O
Differential analog data inputs.
Carrier detect threshold adjust.
External AGC capacitor.
Loop filter component connection.
Loop filter component connection.
Loop filter component connection.
Frequency setting resistor return connection.
Frequency setting resistor connection.
Internal bandgap voltage filter capacitor.
Data rate indication (auto mode) or data rate select (manual mode). TTL/CMOS
compatible I/O. In auto mode these pins can be left unconnected.
Auto or manual mode select. TTL/CMOS compatible input.
26
AUTO/MAN
I
4
GENNUM CORPORATION
R
VCO
_RTN
V
CC
V
EE
521 - 63 - 05
PIN DESCRIPTIONS (Continued)
NUMBER
28, 29
SYMBOL
SCO/SCO
TYPE
O
DESCRIPTION
Serial clock output. SCO/SCO are differential current mode outputs and require
external 75Ω pullup resistors.
Equalized and reclocked serial digital data outputs. SDO/SDO are differential current
mode outputs and require external 75Ω pullup resistors.
31, 32
SDO/SDO
O
GS9025
36
38
39
CLK_EN
COSC
LOCK
I
I
O
Clock enable. When HIGH, the serial clock outputs are enabled.
Timing control capacitor for internal system clock.
Lock indication. When HIGH, the GS9025 is locked. LOCK is an open collector output
and requires an external 10kΩ pullup resistor.
Signal strength indicator/Carrier detect.
Analog/Digital select.
SMPTE/Other data rate select. TTL/CMOS compatible input.
Output ‘Eye’ monitor. OEM is a single ended current mode output and requires an
external 50Ω pullup resistor.
40
41
42
43
SSI/CD
A/D
SMPTE
OEM
O
I
I
O
5
GENNUM CORPORATION
521 - 63 - 05
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