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LMC1992CCN

更新时间： 2024-01-14 20:01:27

品牌	Logo	应用领域
美国国家半导体 - NSC		音频控制集成电路消费电路商用集成电路光电二极管信息通信管理
页数	文件大小	规格书
14页	261K
描述
LMC1992 Digitally-Controlled Stereo Tone and Volume Circuit with Four-Channel Input-Selector

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技术参数
数据手册

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LMC1992CCN 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	DIP, DIP28,.6	Reach Compliance Code：	unknown
风险等级：	5.92	JESD-30 代码：	R-PDIP-T28
JESD-609代码：	e0	端子数量：	28
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	DIP
封装等效代码：	DIP28,.6	封装形状：	RECTANGULAR
封装形式：	IN-LINE	电源：	8 V
认证状态：	Not Qualified	子类别：	Audio Control ICs
表面贴装：	NO	技术：	BICMOS
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	THROUGH-HOLE	端子节距：	2.54 mm
端子位置：	DUAL	Base Number Matches：	1

LMC1992CCN 数据手册

Applications Information (Continued)

SERIAL COMMUNICATION INTERFACE

Figure 5 shows the LMC1992’s timing diagram for its three

wire MICROWIRE interface. A controller’s data stream can

be any length; once the correct device address is received

by the LMC1992, any number of data bits can be sent; the

last nine bits occurring before ENABLE goes high are used

by the LMC1992. The first two bits in a valid data stream are

decoded and used as device address bits. The LMC1992

uses a unique address of 1,0. The LMC1992 will not re-

spond to information on the DATA line if any other address

is used. This allows other MICROWIRE serially programma-

ble devices to share the same three-wire communication

bus. When ENABLE goes high, any further serial data is

ignored and the contents of the shift register is transferred

to the data latches. Only when information is received by

the data latches do any function or setting changes take

place. The first three of nine bits select one of the

LMC1992s functions. The remaining six bits set the select-

ed function to the desired value or position.

TL/H/10789–22

A data bit is accepted as valid and clocked into an internal

shift register on each rising edge of the signal appearing at

the LMC1992s CLOCK input pin. Proper data interpretation

and operation is ensured when ENABLE makes its falling

transition during the time when CLOCK is low. Erroneous

operation will result if the ENABLE signal makes its falling

transition at any other time.

FIGURE 4. The Tone Control Amplifier

Increasing the values of C2 and C3 decreases the turnover

and inflection frequencies: i.e., the Tone Control Response

Curves shown in Typical Performance Curves will shift left

when C2 and C3 are increased and shift right when C2 and

0.0082, 2 dB steps are

C3 are decreased. With C2

achieved at 100 Hz and 10 kHz. Changing C2 and C3 to

0.01 mF shifts the 2 dB per step frequency to 72 Hz and 8.3

kHz. If the tone control capacitors’ size is decreased these

dB steps take place at 130 Hz and 11.2 kHz.

0.0068 mF the 2

frequencies will increase. With C2

FADER FUNCTION

The four fader functions are all independently adjustable

and therefore no balance control is needed. Emulating a

balance control is accomplished through software by simul-

taneously changing a channel’s front and rear faders by

equal amounts. To satisfy normal balance requirements the

faders have an attenuation range of 40 dB.

TL/H/10789–21

Note 1: Negative transition on ENABLE clears previous address. Clock must be low during transition.

Note 2: Additional don’t care states may be inserted here for ease of programming. (Optional.)

Note 3: Positive transition on ENABLE latches in new data if the LMC1992 has been addressed. Clock can either be high or low during transition.

FIGURE 5. Clocking Data into the Standard MICROWIRE Interface

(Minimum Number of Bits in Data Stream)

1...6 7 8910 11 12...14

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与LMC1992CCN相关器件

型号	品牌	描述	获取价格	数据表
LMC1992N	TI	IC,TONE/VOLUME/BALANCE CONTROL,BICMOS,DIP,28PIN,PLASTIC	获取价格
LMC1993N	TI	IC,TONE/VOLUME/BALANCE CONTROL,BICMOS,DIP,28PIN,PLASTIC	获取价格
LMC2001	NSC	High Precision, 6MHz Rail-To-Rail Output Operational Amplifier	获取价格
LMC2001ACM5	NSC	High Precision, 6MHz Rail-To-Rail Output Operational Amplifier	获取价格
LMC2001ACM5X	NSC	High Precision, 6MHz Rail-To-Rail Output Operational Amplifier	获取价格
LMC2001ACM5X	TI	OP-AMP, 40uV OFFSET-MAX, 6MHz BAND WIDTH, PDSO5, SOT-23, 5 PIN	获取价格

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