Product Brief
June 2000
L9219A/G Low-Cost Line Interface
with Reverse Battery and Dual Current Limit
Features
■Basic forward/reverse battery SLIC functionality at
a low cost
■Pin compatible with Lucent L9217 and L9218
SLICs
■Low active power (typical 135 mW during on-hook
transmission)
■Low-power scan mode for low-power on-hook
power dissipation (55 mW typical)
■Distortion-free on-hook transmission
■Convenient operating states:
— Forward active-low current limit
— Forward active-high current limit
— Reverse active-low curr ent limit
— Reverse active-high current limit
— Low-power scan
— Disconnect (high impedance)
■Minimal external components required
■Two gain options to optimize codec interface
■Adjustable super vision fu nctions:
— Off-hook detector with hysteresis
— Ring trip detector
■Logic controlled high and low current limit
■Ramped rate of battery reversal
■Thermal protection with thermal shutdown indica-
tion
Description
This general-purpose electronic subscriber loop
interface circuit (SLIC) is optimized for low cost, while
still providing a satisfactory set of features. This part
is a pin-for-pin replacement for the Lucent Technolo-
gies L9217 and L9218 SLICs.
The L9219 requires a 5 V power supply and single
battery to operate. This device offers forward and
reverse battery operation. The rate of battery rever-
sal may be ramped to meet international require-
ments. Additionally, a low-power scan mode, wherein
all circuitry except the off-hook supervision is shut
down to conserve power, is available.
The dc current limit may be programmed via a single
external resistor. Via the logic table, the current limit
may be increased a nominal 42% above the value
set by the IPROG resistor, giving the user a high-low
current limit option.
Device overhead is fixed and is adequate for
3.14 dBm into 900 Ω of on-hook transmission.
Both the loop supervision and ring trip supervision
functions are offered with user-controlled thresholds
via external resistors.
The L9219 is offered with a receive gain that is opti-
mized for interface to a first-generation type codec
(L9219A). It is also offered with a gain option that is
optimized for interface to a third- or fourth-generation
type codec (L9219G); in both cases, minimizing
external components required at this interface.
Data control is via a parallel data control scheme.
The device is available in a 28-pin PLCC package. It
is built by using a 90 V complementary bipolar
(CBIC) proces s.
Product Brief
June 2000
with Reverse Battery and Dual Current Limit
L9219A/G Low-Cost Line Interface
Lucent Technologies Inc. reserves the right to make changes to the product(s) or information contained herein without notice. No liability is assumed as a result of their use or application. No
rights under any patent accompany the sale of any such product(s) or information.
Copyright © 2000 Lucent Technologies Inc.
All Rights Reserved
Printed in U.S.A.
June 2000
PB00-073ALC (Replaces PN00-043ALC)
For additional information, contact y our Microelectronics Group Account Manager or the following:
INTERNET: http://www.lucent.com/micro
E-MAIL: docmaster@micro.lucent.com
N. AMERICA: Microelectronics Group, Lucent Technologies Inc., 555 Union Boulevard, Room 30L-15P-BA, Allentown, PA 18109-3286
1-800-372-2447, FAX 610-712-4106 (In CANADA: 1-800-553-2448, FAX 610- 712-4106)
ASIA PACIFIC: Microelectronics Group, Lucent Technologies Singapore Pte. Ltd., 77 Science Park Drive, #03-18 Cintech III, Singapore 1182 56
Tel. (65) 778 8833, FAX (65) 777 7495
CHIN A: Micro el ectr onic s Gr oup, L ucen t Technol ogies (Ch ina) Co. , Lt d., A-F2 , 23/ F, Zao Fong U nive rse Bu ild in g, 18 00 Zho ng Sh an Xi Road, Shanghai
200233 P. R. China Tel. (86) 21 6440 0468, ext. 325, FAX (86) 21 6440 065 2
JAPAN: Microelectronics Group, Lucent Technologies Japan Ltd., 7-18, Higashi-Gotanda 2-chome, Shinagawa-ku, Tokyo 141, Japan
Tel . (81) 3 5421 1600, FAX (81) 3 5421 1700
EUROPE: Data Requests: MICROELECTRONICS GROUP DATALINE: Tel. (44) 7000 582 368, FAX (44) 1189 328 148
Technical Inquiries: G E RM A NY: (49) 89 95086 0 (Munich), UNITED KINGDOM: (44) 1344 865 900 (Ascot),
FRANCE: (33) 1 40 83 68 00 (Paris), SWEDEN: (4 6) 8 59 4 607 00 (Stockholm), FINLAND : (358) 9 4354 2800 (Helsinki),
ITALY: (39) 02 6608131 (Milan), SPAIN: (34) 1 807 1441 (Madrid)
Application
12-3561D (f)
RPROG
30.9 kΩ
RLCTH
24.3 kΩ
RPT
50 Ω
L7591
RPR
PT
18
1
7LCTH
8DCOUT
50 ΩPR
10
RTSP
20
RTS1
510 ΩRTSN
19
RTSN
3.4 MΩ
VRING
VBAT
CF2
11 CF1
12
CF1
0.47 µF
AGND
16 BGND
17
L9219
SLIC
CRTS1
0.015 µF
RTSP
2.94 MΩ
CF2
0.1 µF
RCVN
NSTAT
6DR2
FS
BCLK
1/4 T8536 PCM
HIGHWAY
CONTROL
AND
CLOCK
B0
B1
15
14
RCVP 5
VFRON
VFXI
VFROP
SLIC0a
SLIC3a
SLIC2a
DGND
DX1
DX2
DR1
CVDD
0.1 µF
VDD
CODEC
B2 13 SLIC4a
22
VITR 23
TIP
RING
EMR
VBAT
9
CBAT
0.1 µF
VBAT
TXI 24
VTX 25
TG 26
CB
0.1 µF
RGP1
8.06 kΩ
CB1
0.1 µF
TXI
IPROG VCC
4
CCC
0.1 µF
VCC
