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发表于 2013-1-18 08:23:09
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VOIP:LE9530CETC5 W0 f/ ]2 k3 F/ I, o5 w. F" v
The Le9530 Dual Ringing SLIC device is a dual-channel device optimized to provide battery feed, ringing, and supervision on voice loops found in short-loop VoIP applications. This device is optimized to interface to the Broadcom BCM3378/3380/3382 and BCM6816 devices, or a similar codec. The Le9530 device operates independently from a single, user-adjusted battery and a +3.3 V VCC per channel. Each channel provides forward and reverse battery feed, voice transmission, power ringing, an ultra low-power scan state, ground start (Tip open), and a disconnect state. A test load switch is also included to support integrated test algorithms.* N% R _: r5 {+ O; J, f2 w
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Features & Benefits j6 F; O1 k' x
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Dual Architecture
4 L) ~0 `6 L2 U" Z3 Z( c* O Two fully independent integrated SLIC channel/ v) S7 U. g# \: D. {8 x
No impulse noise crosstalk in any operation states to the listening channel in forward or reverse active states
4 L: i9 M; P0 R# P/ h) N2 c Two Power Supplies
9 |/ C6 V* {: X: r Single user adjusted battery input per channel! ^. G7 T) t. |1 M9 S" M4 o1 `1 o/ T
3.3 V for VCC, i. Z; c/ P9 Y0 W" F: ?" V% e _8 i
High Voltage Design
# X6 W$ [. P% e. E2 B6 y Meets Comcast Ringing requirements without clipping" S, i& s' l, s- ]3 Y
distortion3 M. v: |3 L6 Z
Robust solution with no damage during extended ringing cycles or switching the ringer on and off
+ J: e9 v# c) E9 z) b Allows use of 50 ? protection resistors and lower cost lower current rated protectors. @3 k& m+ B8 C( J: C
Two Grades
' h7 K0 L3 V/ n, ]2 i7 U Up to ?145 V ringing battery Le9530D! f O2 E6 @, E+ g! Q" a, x
Up to ?100 V ringing battery Le9530C% w, e6 k# S! y" A5 Z
Channel Independent Eight Operating States
; ?* d! y" M6 \/ m9 V" R0 v2 X" s Scan state for minimal power dissipation
) N% \( J( l2 W5 n* V Active Forward Battery 25mA DC Current Limit
" [ P$ D. Y; i7 Z% ]7 k2 ~ Active Reverse Battery 25mA DC Current Limit. ]: q/ y. a: }6 c: e
Active Forward Battery 40mA DC Current Limit( @, U, `8 G% y7 {& C
Active Reverse Battery 40mA DC Current Limit
4 ? F$ Z t% z/ A% ~ Tip Open Ground Start
) U; z, ^# x: x1 s Ringing
% k; t; R8 A/ q Disconnect (Default Power Up Mode) + q+ K y# }1 Y2 H* g( N, I5 f. d! A
Per Channel Ringing Inputs for Optimized Interface to BCM SoC Devcies$ [7 C; Y4 v- a H
Allows to accept driving signals from per channel voice outputs as well as from PWM outputs 4 N9 j7 \1 M9 t; l0 W
Ultra-Low On-Hook Power G( n+ ?% j7 t/ @" J' b/ K! C
Loop Start, Ring Trip, and Ground Start Detections7 H4 R& d/ r; ^9 Z+ s
Loop closure detection with hysteresis to minimize dial pulse distortion 9 B) T: H; V7 U$ z& _3 E
Thermal Shutdown Protection with Hysteresis$ C7 x3 H+ r0 \1 k/ d5 X
Test Load Switch4 \2 y+ k, M6 K! C; t, @+ Q- n
Supports integrated test algorithms |
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