MIC3001 查看數據表（PDF） - Micrel

零件编号

产品描述 (功能)

生产厂家

MIC3001

FOM Management IC with Internal Calibration

Micrel 

Micrel, Inc.

MIC3001

Pin Description

Pin Number

11

Pin Name

TXDISABLE

12

DATA

13

CLK

14

VIN

15

RSIN

16

GNDD

17

NC

18

VDDD

19

RXLOS

20

RSOUT (GPO)

21

COMP

22

VBIAS

23

VMOD–

24

VMOD+

Pin Function

Digital Input; Active High. The transmitter is disabled when this line is high or the STXDIS bit

is set. The state of this input is always reflected in the TXDIS bit.

Digital I/O; Open-drain. Bi-directional serial data input/output.

Digital Input; Serial bit clock input.

If bit 4 (IE) in USRCTL register is set to 0 (default), this pin is configured as analog input. If

IE bit is set to 1, this pin is configured as open-drain output. Analog Input: Multiplexed A/D

input for monitoring supply voltage. 0V to 5.5V input range. Open-drain output: outputs the

internally generated interrupt signal /INT.

Digital Input; Rate Select Input; ORed with rate select bit to determine the state of the

RSOUT pin. The state of this pin is always reflected in the RSEL bit.

Ground return for digital functions.

No connection. This pin is used for test purposes and must be left unconnected.

Power supply input for digital functions.

Digital Output; Active-High/Open-Drain. Indicates the loss of the received signal as indicated

by a level of received optical power below the programmed RXLOS comparator threshold;

may be wire-ORed with external signals. Low indicates normal operation. RXLOS is de-

asserted when VRX > LOSFLTn. The LOS bit reflects the state of RXLOS whether driven by

the MIC3001 or an external circuit.

Digital Output. Open-Drain or push-pull. When used as rate select output, this output is

controlled by the SRSEL bit ORed with RSIN input and is open drain only. When used as a

general-purpose, non-volatile output, it is controlled by the GPO configuration bits in

OEMCFG3.

Analog Output, compensation terminal. Connect a capacitor between this pin and GNDA or

VDDA with appropriate value to tune the APC loop time constant to a desirable value.

Analog Output. Buffered DAC output capable of sourcing or sinking up to 10mA under

control of the APC function to drive an external transistor for laser diode D.C. bias. The

output and feedback polarity are programmable to accommodate either a NPN or an PNP

transistor to drive a common-anode or common-cathode laser diode.

Analog Input. Inverting terminal of VMOD buffer op-amp. Connect to VMOD+ (gain = 1) or

feedback resistors network to set a different gain

Analog Output. Buffered DAC output to set the modulation current on the laser driver IC.

Operates with either a 0– VREF or a (VDD–VREF) – VDD output swing so as to generate

either a ground-referenced or a VDD referenced programmed voltage. A simple external

circuit can be used to generate a programmable current for those drivers that require a

current rather than a voltage input. See “Applications Information” section for more details.

August 2004

8

M9999-082404-A

hbwhelp@micrel.com or (408) 955-1690

Share Link: