DS21FF44 データシートの表示（PDF） - Maxim Integrated

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DS21FF44

4 x 3 12-Channel E1 Framer, 4 x 4 16-Channel E1 Framer

Maxim Integrated 

2. MCM PIN DESCRIPTION

DS21FT44/DS21FF44

Table 2-1. PIN DESCRIPTION SORTED BY SYMBOL

PIN

SYMBOL

I/O

DESCRIPTION

B7

8MCLK

O 8.192 MHz Clock Based on CLKSI.

G20

A0

I

Address Bus Bit 0 (lsb).

H20

A1

I

Address Bus Bit 1.

G19

A2

I

Address Bus Bit 2.

H19

A3

I

Address Bus Bit 3.

G18

A4

I

Address Bus Bit 4.

H18

A5

I

Address Bus Bit 5.

G17

A6

I

Address Bus Bit 6.

H17

A7

I

Address Bus Bit 7 (msb).

W15

BTS

I

Bus Timing Select. 0 = Intel / 1 = Motorola.

B6

CLKSI

I

Reference clock for the 8.192MHz clock synthesizer.

T8

CS1*

I

Chip Select for Quad Framer 1.

Y4

CS2*

I

Chip Select for Quad Framer 2.

Y15

CS3*

I

Chip Select for Quad Framer 3.

E19

CS4*/NC

I

Chip Select for Quad Framer 4. NC on Four x Three.

L20

D0

I/O Data Bus Bit 0 (lsb).

M20

D1

I/O Data Bus Bit 1.

L19

D2

I/O Data Bus Bit 2.

M19

D3

I/O Data Bus Bit 3.

L18

D4

I/O Data Bus Bit 4.

M18

D5

I/O Data Bus Bit 5.

L17

D6

I/O Data Bus Bit 6.

M17

D7

I/O Data Bus Bit 7 (msb).

C7

DVDD1

— Digital Positive Supply for Framer 1.

E4

DVDD1

— Digital Positive Supply for Framer 1.

D2

DVDD1

— Digital Positive Supply for Framer 1.

K3

DVDD2

— Digital Positive Supply for Framer 2.

U7

DVDD2

— Digital Positive Supply for Framer 2.

P2

DVDD2

— Digital Positive Supply for Framer 2.

V19

DVDD3

— Digital Positive Supply for Framer 3.

T12

DVDD3

— Digital Positive Supply for Framer 3.

L16

DVDD3

— Digital Positive Supply for Framer 3.

D17

DVDD4/NC

—

Digital Positive Supply for Framer 4. NC on Four x

Three.

F16

DVDD4/NC

—

Digital Positive Supply for Framer 4. NC on Four x

Three.

B11

DVDD4/NC

—

Digital Positive Supply for Framer 4. NC on Four x

Three.

E9

DVSS1

— Digital Signal Ground for Framer 1.

A6

DVSS1

— Digital Signal Ground for Framer 1.

D5

DVSS1

— Digital Signal Ground for Framer 1.

U3

DVSS2

— Digital Signal Ground for Framer 2.

K4

DVSS2

— Digital Signal Ground for Framer 2.

7 of 117

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