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參數(shù)資料
| 型號： | TCM37C15AN |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | PCM COMBO WITH PROGRAMMABLE GAIN CONTROL |
| 中文描述： | 的PCM組合，具有可編程增益控制 |
| 文件頁數(shù)： | 1/23頁 |
| 文件大?。?/td> | 351K |
| 代理商： | TCM37C15AN |
TCM37C14A, TCM37C15A
PCMCOMBO WITH PROGRAMMABLE GAIN CONTROL
SLWS018B – JUNE 1996 – REVISED MAY 1998
1
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
Meet CCITT/(D3/D4) Channel Bank
Recommendations for Input Signals
Greater than –55 dBm0
Programmable Transmit and Receive Gain
Control With Pin-Selectable
Gain/Attenuation Levels
Includes Differential Output on the
TCM37C14A
Precision Switched-Capacitor Filters and
Converters
Improved Version TCM29C13A Series
COMBOs (CODEC and Filters)
Low Power CMOS
– Operating Mode . . . 70 mW Typical
– Power-Down Mode . . . 7 mW Typical
Internal Sample-and-Hold and Autozero
Functions
Precision Internal Voltage References
TCM37C14A Features Pin-Selectable
μ
-Law
or A-Law Companding and Pin-Selectable
Master Clock Rate (1.536 MHz, 1.544 MHz,
and 2.048 MHz Available)
TCM37C15A is 2.048 MHz A-Law Only
description
The TCM37C14A and TCM37C15A PCM combo with programmable gain control devices are single-chip PCM
combos (pulse-code-modulated CODECs with voice-band filtering). They are designed to perform transmit
encoding (A/D conversion) and receive decoding (D/A conversion), as well as the transmit and receive filtering
functions required to meet CCITT/(D3/D4) G.711 and G.714 specifications in a PCM system. Each device
provides all the functions required to interface a full-duplex, 4-line voice telephone circuit with a TDM
(time-division-multiplexed) system, and also perform the encoding and decoding of call progress tones. The
TCM37C14A and TCM37C15A are based on the proven TI TCM29C13A core, and have the added feature of
programmable transmit and receive gain.
Primary applications include line interface for digital transmission and switching of T1/E1 carrier (PABX [private
branch automatic exchange] and central office telephone systems), subscriber line concentrators, digital
encryption systems, and digital signal processing. They are intended to be used at the analog termination of
a PCM line or trunk to the POTS (plain old telephone system) local-loop line.
The TCM37C15A is available in 20-pin DW SOIC (small-outline IC) or 20-pin N PDIP (plastic dual-in-line
package) packages, and the TCM37C14A is available in a 24-pin DW SOIC package and includes differential
output. All are characterized for operation from –40
°
C to 85
°
C.
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Copyright
1998, Texas Instruments Incorporated
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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V
BB
PWRO+
PWRO–
RIN
RS1
RS2
GSR
GS1
GS0
CLKSEL
PCMIN
FSR
V
CC
GSX
TS1
TS2
ANLGIN
AGND
TSX
PCMOUT
FSX
ASEL
MCLK
DGND
TCM37C14A . . . DW PACKAGE
(TOP VIEW)
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V
BB
PWRO+
RIN
RS1
RS2
GSR
GS1
GS0
PCMIN
FSR
V
CC
GSX
TS1
TS2
ANLGIN
AGND
PCMOUT
FSX
MCLK
DGND
TCM37C15A . . . DW OR N PACKAGE
(TOP VIEW)
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