ACS8525T Semtech, ACS8525T Datasheet - Page 101

• Manufacturer Part Number: ACS8525T
• Description: Line Card Protection Switch for SONET/SDH Systems
• Manufacturer: Semtech

Table 23 DC Characteristics: PECL Input/Output Port (cont...)
Notes: (i) Unused differential input ports should be left floating and set in LVDS mode, or the positive and negative inputs tied to V
Figure 13 Recommended Line Termination for PECL Input/Output Ports
Revision 3.01/August 2005 © Semtech Corp.
ADVANCED COMMUNICATIONS
Across all operating conditions, unless otherwise stated
PECL Input Low Voltage
Single-ended Input (Note iii)
PECL Input High Voltage
Single-ended Input (Note iii)
Input High Current
Input Differential Voltage V
Input Low Current
Input Differential Voltage V
PECL Output Low Voltage (Note iv)
PECL Output High Voltage (Note iv)
PECL Output Differential Voltage (Note iv)
(iii) Unused differential input terminated to V
(iv) With 50
(ii) Assuming a differential input voltage of at least 100 mV.
respectively.
Parameter
Ω
load on each pin to V
n x 8 kHz,
1.544/2.048 MHz,
6.48 MHz,
19.44 MHz,
38.88 MHz,
51.84 MHz,
77.76 MHz or
155.52 MHz
n x 8 kHz,
1.544/2.048 MHz,
6.48 MHz,
19.44 MHz,
38.88 MHz,
51.84 MHz,
77.76 MHz or
155.52 MHz
ID
ID
= 1.4V
= 1.4V
Z
Z
Z
Z
O
O
O
O
= 50Ω
= 50Ω
= 50Ω
= 50Ω
DD
- 2 V, i.e. 82
130 Ω
130 Ω
82 Ω
82 Ω
V
V
Symbol
V
V
V
I
ILPECL_S
ILPECL_S
I
IHPECL
OLPECL
OHPECL
ODPECL
ILPECL
DD
- 1.4 V.
V
V
Ω
GND
GND
DD
DD
to GND and 130
130 Ω
82 Ω
130 Ω
82 Ω
FINAL
Page 101
Minimum
V
V
V
V
SEC1POS
SEC1NEG
SEC2POS
SEC2NEG
Z
V
n
DD
DD
DD
DD
O
DD
580
-10
-10
-2.10
-1.25
-2.4
-1.3
= Transmission line Impedance
= +3.3 V
= Integer 1 to 12,500
01POS
01NEG
Ω
to V
DD
.
Z
Z
O
O
= 50Ω
= 50Ω
Typical
-
-
-
-
-
-
-
130 Ω
82 Ω
V
DD
GND
Maximum
ACS8525 LC/P
F8595D_024PECL_01
V
V
V
V
DD
DD
DD
DD
130 Ω
82 Ω
+10
+10
900
-1.62
-0.88
-1.5
-0.5
Fully
Programmable
Output Frequencies
DATASHEET
www.semtech.com
DD
Units
µΑ
mV
µA
V
V
V
V
and GND