ELAN EM92600AP, EM92600AM, EM92601AP, EM92601AM Datasheet

GENERAL DESCRIPTION

The EM92600/1A series are developed for 46/49 MHz of 10 channels band frequency of cordless telephone
which is used in U.S.A.. These devices are dual phase-locked loop frequency synthesizers contained ROM
counters for receive and transmit loops with two independent phase detect circuits. A common reference
oscillator and reference divider are share by the receive and transmit circuits.
Other features include a lock detect circuit for the transmit loop, illegal code default, a buffered oscillator output
for mixing purposes in the system, 5KHz tone output . The EM92601A is designed for easy MPU interface. It
provides the same features as the EM92600A , but accepts channel programming via a clocked, serial input
instead of parallel BCD inputs. The EM92600A is selected channels via machanical switches of parallel BCD
input.

FEATURES

EM92600/1A

EM92600/1A

DUAL PLL FOR 46/49 MHZ CORDLESS PHONE

DUAL PLL FOR 46/49 MHZ CORDLESS PHONE

• Include oscillation circuit with external X-TAL (10.240 MHz).

• Unlock detector.

• 5KHz output for guard tone.

• Standby mode for power saving.

• 2.5 to 5.5V supply range.

• Baseset/Handset changeable.

• Available in 16 pin DIP or SOP.

• SERIES
Part Number Package Channel Selection
EM92600AP DIP parallel
EM92600AM SOP parallel
EM92601AP DIP serial
EM92601AM SOP serial

PIN ASSIGNMENTS

XTALO

MODE

SB
5K
D0
D1
D2
D3

EM92600A

1

16

2

15

3

14

4

13

5

12

6

11

7

10

8

9

XTALI

DD

V
RIF
PDR

SS

V
PDT
LD
TIF

XTALO

MODE

SB
5K

DI

CLK

NC
EN

EM92601A

1

16

2

15

3

14

4

13

5

12

6

11

7

10

8

9

XTALI

DD

V
RIF
PDR

SS

V
PDT
LD
TIF

* This specification are subject to be changed without notice.

4.23.1995

1

FUNCTIONAL BLOCK DIAGRAM

XTAL1

PDT

LD

DD

V

Lock

detector

XTAL0

phase

detector

V

DD

V

Reference

counter

divide by 2048

EM92600/1A

DUAL PLL FOR 46/49 MHZ CORDLESS PHONE

SS

DD

V

5K

Phase

detector

PDR

XTAL1

LD

PDT

TIF

TIF

14 bits divide by N

Transmit counter

SB

b13-b0

ROM 32*28

& decoder logic

D3

14 bits divide by N

D2D1D0

receive counter

b27-b14

MODE

RIF

EM92600A block diagram

DD

V

counter

SS

Phase

detector

14 bits divide by N

receive counter

b27-b14

V

DD

5K

PDR

RIF

XTAL0

V

DD

Lock

detector

phase

detector

14 bits divide by N

Transmit counter

V

Reference

divide by 2048

b13-b0

4 bits
latch

4 bits

S/R

DICLKEN

SB

ROM 32*28

& decoder logic

MODE

EM92601A block diagram

PIN DESCRIPTIONS

Symbol Pin No. Function

XTALO O This ouput generates reference frequency when it is connected to pin 16 with

external OSC of which frequency is 10.240MHz

MODE I Base/remote changing. Internal pull down.

=base,VSS=remote.

V

DD

SB I The standby pin is uses to save power when no transmit. Internal pull down.

High: transmit and receive active
Low: receive acts only

5K O The signal derived from the reference oscillator. 5KHz output.

* This specification are subject to be changed without notice.

4.23.1995

2