Alesis Semiconductor

DS1402-0702

12555 Jefferson Blvd., Suite 285

Los Angeles, CA 90066

Phone (310) 301-0780

Fax (310) 306-1551

www.alesis-semi.com

-2-

Table 1

Electrical Characteristics and Operating Conditions

Symbol

Description

Min

Typ

Max

Units

Recommended Operating Conditions

Supply Voltage

4.5

5.0

5.5

V

Supply Current, Master

-

7.7

-

mA

Supply Current, Slave

-

5.4

-

mA

GND

Ground

-

0.0

-

V

Fs

Sample rate

30

48

55

kHz

Temp

Temperature

0

25

70

°C

Inputs (WDCLK, FMT, OPDIGIN, MODE, LINMODE, MUTE, HOLDERR)

Logical “1” input voltage

--

Logical “0” input voltage

-

-

Logical “1” input current

-

-

1

uA

Logical “0” input current

-

-

1

uA

Logic Input Capacitance

-

5

-

pF

Outputs (WDCLK, DVCO, OPDIGTHRU, SVCO, BCLK, ERROR)

Logical “1” output voltage

--

Logical “0” output voltage

-

-

Logical “1” output current

-

-

-8

mA

Logical “0” output current

-

-

8

mA

Outputs (OUT, USER)

Logical “1” output voltage

--

Logical “0” output voltage

-

-

Logical “1” output current

-

-

-2

mA

Logical “0” output current

-

-

2

mA

Table 2

Pin Descriptions

Pin #

Name

Pin

Type

Description

1GND

Power

Ground pin

2

MODE0

Input

Mode select

3

FMT0

Input

Format select

4

FMT1

Input

Format select

5

MODE1

Input

Mode select

6

OPDIGIN

Input

Input from optical receiver

7SVCO

Output

Derived clock from WDCLK in slave mode; derived from DVCO in Master mode

(nominal 12.288MHz, 256x Fs)

8

WDCLK

I/O

Input or output word clock, see Table 4, Modes (nominal 48KHz, Fs)

9

BCLK

Output

Bit clock (nominal 3.072MHz, 64 x Fs)

10

OUT 1/2

Output

Channels 1 and 2 data output

11

OUT 3/4

Output

Channels 3 and 4 data output

12

OUT 5/6

Output

Channels 5 and 6 data output

13

OUT 7/8

Output

Channels 7 and 8 data output

14

USER0

Output

USER0 data bit output. Used to receive timecode

15

USER1

Output

USER1 data bit output. Used to receive MIDI data.

16

USER2

Output

USER2 data bit output. Reserved.

17

USER3

Output

USER3 data bit output. Reserved.

18

DVCO

Output

Recovered clock from data stream(nominal 12.288MHz, 256 x Fs)

19

OPDIGTHRU

Output

OPDIGIN is regenerated and clocked out on this pin to allow daisy-chaining

20

HOLDERR

Input

If high, the ERROR pin stays high until the cause of the error is removed AND

the HOLDERR pin goes low.

21

ERROR

Output

Indicates lack of input or failure to synchronize to data stream, mutes data

outputs but not clock outputs

22

MUTE

Input

If high, mutes outputs

23

LINMODE

Input

Tie high

24

Power

+5V power pin