Rainbow Electronics MAX3634 User Manual
Page 4
MAX3634
622Mbps/1244Mbps Burst-Mode Clock Phase
Aligner for GPON OLT Applications
4
_______________________________________________________________________________________
PIN
NAME
FUNCTION
1, 2, 12, 25, 36, 37, 48
GND
Supply Ground
3, 6, 7, 10
V
CC
I
+3.3V Supply for Input Buffers
4
SDI+
Positive Serial Data Input, LVPECL
5
SDI-
Negative Serial Data Input, LVPECL
8
RST+
Positive Reset Input, LVPECL. Reset (= RST+ - RST-) is falling edge triggered.
9
RST-
Negative Reset Input, LVPECL
11, 38, 39, 44, 47
V
CC
+3.3V Supply for Digital Circuitry
13–20, 22, 23
TEST
Production Test Pins, Reserved. Leave open for normal operation.
21, 24, 26, 29, 32, 35
V
CC
O
+3.3V Supply for Output Buffers
27
LOCK-
Negative Lock Status Output, LVPECL
28
LOCK+
Positive Lock Status Output, LVPECL. Lock (= (LOCK+) - (LOCK-)) high indicates that the
MAX3634 has acquired the correct phase.
30
SDO-
Negative Serial Data Output, LVPECL
31
SDO+
Positive Serial Data Output, LVPECL
33
SCLK-
Negative Serial Clock Output, LVPECL
34
SCLK+
Positive Serial Clock Output, LVPECL
40
RATESEL
Rate Select Input, TTL. High selects 622.08Mbps operation.
41, 43
V
CC
V
+3.3V Supply for VCO
42
FILT
PLL Filter Capacitor. Connect a 0.1µF X7R capacitor from pin 42 to V
CC
V.
45
REFCLK-
Negative Reference Clock Input, LVPECL (1/8th data rate)
46
REFCLK+
Positive Reference Clock Input, LVPECL
EP
Exposed Pad The exposed pad must be connected to the ground plane for proper thermal performance.
Pin Description
Typical Operating Characteristics (continued)
(V
CC
= +3.3V and T
A
= +25
°C, unless otherwise noted)
JITTER TOLERANCE vs. SDI-TO-REFCLK
PHASE (1.244Gbps)
MAX3634 toc04
SDI-TO-REFCLK PHASE (ps)
JITTER TOLERANCE (UI
P-P
)
600
400
200
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0
800
LIMITED BY TEST EQUIPMENT
JITTER TOLERANCE vs. SDI-TO-REFCLK
PHASE (622Mbps)
MAX3634 toc05
SDI-TO-REFCLK PHASE (ps)
JITTER TOLERANCE (UI
P-P
)
600
400
200
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0
0
800
LIMITED BY TEST EQUIPMENT
SUPPLY CURRENT
vs. TEMPERATURE
MAX3634 toc06
AMBIENT TEMPERATURE (
°C)
SUPPLY CURRENT (mA)
50
0
220
240
260
280
300
320
340
200
-50
100
EXCLUDES PECL OUTPUT CURRENT