Motorola MC10E445FNR2, MC100E445FNR2, MC100E445FN, MC10E445FN Datasheet

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SEMICONDUCTOR TECHNICAL DATA

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The MC10/100E445 is an integrated 4-bit serial to parallel data

converter. The device is designed to operate for NRZ data rates of up to

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2.0Gb/s. The chip generates a divide by 4 and a divide by 8 clock for both
4-bit conversion and a two chip 8-bit conversion function. The conversion
sequence was chosen to convert the first serial bit to Q0, the second to
Q1 etc.

• On-Chip Clock ÷4 and ÷8

• 2.0Gb/s Data Rate Capability

• Differential Clock and Serial Inputs

• V

Output for Single-Ended Input Applications

BB

PARALLEL CONVERTER

4-BIT SERIAL/

• Asynchronous Data Synchronization

• Mode Select to Expand to 8-Bits

• Internal 75kΩ Input Pulldown Resistors

• Extended 100E V

Two selectable serial inputs provide a loopback capability for testing
purposes when the device is used in conjunction with the E446 parallel to
serial converter.

The start bit for conversion can be moved using the SYNC input. A
single pulse applied asynchronously for at least two input clock cycles
shifts the start bit for conversion from Qn to Qn–1. For each additional
shift required an additional pulse must be applied to the SYNC input.
Asserting the SYNC input will force the internal clock dividers to “swallow”
a clock pulse, effectively shifting a bit from the Qn to the Qn–1 output (see
Timing Diagram B).

The MODE input is used to select the conversion mode of the device. With the MODE input LOW, or open, the device will
function as a 4-bit converter. When the mode input is driven HIGH the data on the output will change on every eighth clock cycle
thus allowing for an 8-bit conversion scheme using two E445’s. When cascaded in an 8-bit conversion scheme the devices will
not operate at the 2.0Gb/s data rate of a single device. Refer to the applications section of this data sheet for more information on
cascading the E445.

For lower data rate applications a VBB reference voltage is supplied for single-ended inputs. When operating at clock rates
above 500MHz differential input signals are recommended. For single-ended inputs the VBB pin is tied to the inverting differential
input and bypassed via a 0.01µF capacitor. The VBB provides the switching reference for the input differential amplifier . The V
can also be used to AC couple an input signal, for more information on AC coupling refer to the interfacing section of the design
guide in the ECLinPS data book.

Upon power-up the internal flip-flops will attain a random state. To synchronize multiple E445’s in a system the master reset
must be asserted.

Range of –4.2V to –5.46V

EE

FN SUFFIX

PLASTIC PACKAGE

CASE 776-02

BB

PIN NAMES

Pin Function

SINA, SINA
SINB, SINB
SEL
Q0–Q3
CLK, CLK
CL/4, CL/4
CL/8, CL/8
MODE
SYNCH

Differential Serial Data Input A
Differential Serial Data Input B
Serial Input Selector Pin
Parallel Data Outputs
Differential Clock Inputs
Differential ÷4 Clock Output
Differential ÷8 Clock Output
Conversion Mode 4-Bit/8-Bit
Conversion Synchronizing Input

FUNCTION TABLES

Mode Conversion SEL Serial Input

L

H

8/97

 Motorola, Inc. 1997

4-Bit
8-Bit

H

L

1

V

CL/4

NCMODESINASINA

CCO

CCO

19202122232425

18
17
16
15
14
13
12

111098765

Q3V

SOUT
SOUT
V

CC

Q0
Q1
V

CCO

Q2

SYNC

RESET

SINB

26

SINB

27

SEL

28

V

EE

CLK
CLK
V

BB

A
B

Figure 1. 28–Lead Pinout

1
2
3
4

REV 3

CL/8CL/8

(Top View)

CL/4V

CCO

MC10E445 MC100E445

SINB
SINB

SINA
SINA

SEL

QD

QD Q2QD

QD Q1QD

QD Q0QD

QD

Q3

MODE

CLK
CLK

SYNC

RESET

OutIn

Latch

EN

QD

D

Q

Figure 2. Logic Diagram

SOUT
SOUT

0

1

Out

÷

4

R

Out

÷

2

R

CL/4
CL/4

CL/8
CL/8

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DL140 — Rev 4

MC10E445 MC100E445

DC CHARACTERISTICS (VEE = VEE(min) to VEE(max); VCC = V

0°C 25°C 85°C

Symbol Characteristic Min Typ Max Min Typ Max Min Typ Max Unit Condition

I

IH

V

OH

V

BB

I

EE

1. The maximum VOH limit was relaxed from standard ECL due to the high frequency output design. All other outputs are specified with the standard

10E and 100E VOH levels.

Input HIGH Current 150 150 150 µA
Ouput HIGH Current

10E (SOUT Only)
100E (SOUT Only)

Output Reference Voltage

10E
100E

Power Supply Current

10E
100E

–1020
–1025

–1.38
–1.38

154
154

–790
–830

–1.27
–1.26

185
185

–980

–1025

–1.35
–1.38

AC CHARACTERISTICS (VEE = VEE(min) to VEE(max); VCC = V

0°C 25°C 85°C

Symbol Characteristic Min Typ Max Min Typ Max Min Typ Max Unit Condition

f

MAX

t

PLH

t

PHL

t

s

t

h

t

RR

t

PW

t

r

t

f

Maximum Conversion Frequency 2.0 2.0 2.0 Gb/s

Propagation Delay to Output

CLK to Q
CLK to SOUT
CLK to CL/4
CLK to CL/8

Setup Time

SINA, SINB
SEL

Hold Time

SINA, SINB, SEL
Reset Recovery Time 500 300 500 300 500 300 ps
Minimum Pulse Width

CLK, MR
Rise/Fall Times

SOUT

Other

1500

1800

975
1325
1325

–200

225

425

2100
1150
1550
1550

350
650

800
1100
1100

–1000–250

450 300 450 300 450 300

400 400 400

100

200

= GND)

CCO

154
154

= GND)

CCO

1500

1800

800

100
200

975
1325
1325

–200

225

425

1100
1100

–1000–250

–760
–830

–1.25
–1.26

185
185

2100
1150
1550
1550

350
650

–910

–1025

–1.31
–1.38

1500

800
1100
1100

–1000–250

100

200

154
177

1800

975
1325
1325

–200

225

425

–670
–830

–1.19
–1.26

185
212

2100
1150
1550
1550

350
650

V

1
1

V

mA

NRZ

ps

ps

ps

ps

ps 20%–80%

DL140 — Rev 4

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