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发表于 2013-1-18 08:23:09
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VOIP:LE9530CETC% N3 A: ^* G8 s; P' k; X+ P, Q/ c
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.; v R4 B4 K. j$ x/ I x, w
+ d8 U" P5 s( f4 O y: u8 w4 ?Features & Benefits
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Dual Architecture
- j5 k: ?2 c- L9 f0 f: z* X; O+ M Two fully independent integrated SLIC channel6 g: ~) k* X1 H( j8 p' S0 e5 _9 O1 M
No impulse noise crosstalk in any operation states to the listening channel in forward or reverse active states9 q9 v" Q; c. m8 M9 x8 ~& a
Two Power Supplies5 G% h9 j: s8 n6 r0 C3 n7 V
Single user adjusted battery input per channel* I8 I- J0 [3 x7 Y1 m
3.3 V for VCC
4 s# y" {% K% E) G High Voltage Design
. A- u5 u5 p: x4 @ Meets Comcast Ringing requirements without clipping
" W* t( h' L% }% V distortion
1 J- i: N* h+ g& u9 u5 j' G2 s9 f Robust solution with no damage during extended ringing cycles or switching the ringer on and off0 E+ D9 j& ]; d
Allows use of 50 ? protection resistors and lower cost lower current rated protectors
7 E8 A# q8 J" d$ K/ q9 t8 | Two Grades. c3 f3 _) l E- m9 C' n
Up to ?145 V ringing battery Le9530D
6 X9 |7 {4 n" i2 o' D Up to ?100 V ringing battery Le9530C- X$ A$ X- ^( \* p9 F
Channel Independent Eight Operating States
1 P5 u: A. b E# X Scan state for minimal power dissipation( d! z( H3 M6 o7 i
Active Forward Battery 25mA DC Current Limit
: x3 w% m' }6 T5 s Active Reverse Battery 25mA DC Current Limit
' D% V/ z: i) _# @ Active Forward Battery 40mA DC Current Limit9 f' t- n. f' ~+ p6 M1 @
Active Reverse Battery 40mA DC Current Limit
2 q% ]' p' |) \% W5 p( L. s. ? Tip Open Ground Start
# h% ^) g9 J! ? Ringing6 F3 J( n% L U b$ R! w
Disconnect (Default Power Up Mode) % @! a0 q% ~2 a+ o2 k
Per Channel Ringing Inputs for Optimized Interface to BCM SoC Devcies
j9 R' o! K# Y' f Allows to accept driving signals from per channel voice outputs as well as from PWM outputs 4 w/ K$ {, w- j( o. z
Ultra-Low On-Hook Power8 }3 B+ k3 C. ~; g* b, E
Loop Start, Ring Trip, and Ground Start Detections- ~( s$ q3 R) }4 ]( w5 V
Loop closure detection with hysteresis to minimize dial pulse distortion * r% V. y2 N7 |. k
Thermal Shutdown Protection with Hysteresis/ T! O, D# m) P# p
Test Load Switch
& m. D' J, x( M/ B9 F% p& f Supports integrated test algorithms |
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