MAXIM DS1123L User Manual

General Description

The DS1123L is an 8-bit programmable timing element
similar in function to the DS1023, but operating at 3.3V.
Like the DS1023, the DS1123L can delay signals up to
a full period or more when used as a delay line, and an
on-chip reference delay can be used to offset the inher­ent “step-zero” delay. This allows the DS1123L to shift a
clock signal over the full 0 to 360° phase range. In
addition to functioning as a delay line, it can be config­ured as a free-running oscillator or an externally trig­gered monostable vibrator.

Applications

Telecommunications

Digital Test Equipment

Digital Video Projection

Signal Generators and Analyzers

Features

♦ Step Sizes of 0.25ns, 0.5ns, 1ns, 2ns

♦ On-Chip Reference Delay

♦ Configurable as a Delay Line, Monostable

Vibrator, or Free-Running Oscillator

♦ Can Delay Signals by a Full Period or More

♦ Guaranteed Monotonicity

♦ Parallel and 3-Wire Serial Programming Interface

♦ Single 3.3V Power Supply

♦ 16-pin TSSOP

DS1123L

3.3V, 8-Bit, Programmable Timing Element

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Maxim Integrated Products

1

15

14

13

12

11

10

9

2

161

3

4

5

6

7

8

OUT/OUT

P/S

P7

P6P2/D

P1/CLK

P0/Q

LE

V

CC

IN

TOP VIEW

MS

P5

REF/PWMGND

P4

P3

DS1123L

Pin Configuration

DS1123L

SYSTEM

CLOCK

MICRO-

PROCESSOR

4

3-WIRE

INTERFACE

IN

Q/P0

CLK/P1

D/P2

P3

P4

LE

P5

MS

P6

P7

P/S

OUT/OUT

V

CC

GND REF/PWM

3.3V

VARIABLE
DELAY/PHASE
OUTPUT

REFERENCE
OUTPUT

(OPTIONAL)

Typical Operating Circuit

Ordering Information

Rev 2; 8/07

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

PART

TEMP

RANGE

PIN­PACKAGE
(150-mil)

STEP SIZE/

NO. OF STEPS

DS1123LE-25

0.25/256

DS1123LE-50

0.5/256

DS1123LE-100

1/256

DS1123LE-200

2/256

0°C to +70°C 16 TSSOP

0°C to +70°C 16 TSSOP

0°C to +70°C 16 TSSOP

0°C to +70°C 16 TSSOP

DS1123L

3.3V, 8-Bit, Programmable Timing Element

2 ______________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS

(TA= 0°C to +70°C)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.

Voltage Range on VCCPin Relative to Ground .....-0.5V to +6.0V

*Voltage Range on IN, LE, Q/P0, CLK/P1, D/P2, P3, P4, P5, MS,

P6, P7, and P/S Relative to Ground..........-0.5V to V

CC

+ 0.5V

Operating Temperature Range...............................0°C to +70°C

Storage Temperature Range .............................-55°C to +125°C

Short-Circuit Output Current .....................................50mA for 1s

Soldering Temperature .......................................See IPC/JEDEC

J-STD-020A Specification

*Not to exceed +6.0V

DC ELECTRICAL CHARACTERISTICS

(VCC= +3.0 to 3.6V, TA= 0°C to +70°C.)

Supply Voltage V

Input Logic 1 V

Input Logic 0 V

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

(Note 1) +3.0 +3.6 V

(Note 2) 0.7 x V

IH

IL

Active and Standby Current I

High-Level Output Current I

Low-Level Output Current I

Input Leakage I

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CC

V

OH

OL

L

= min, V

CC

Q output, V

All other outputs, V

V

CC

-0.3 +0.3 x V

16 30 mA

= 2.3V -1.0 mA

OH

CC

= min, V

= 0.5V 4.0

OL

CC

= min, V

= 0.5V 8.0

OL

-1.0 +1.0 µA

+ 0.3 V

CC

CC

V

mA

DS1123L

3.3V, 8-Bit, Programmable Timing Element

_____________________________________________________________________ 3

AC ELECTRICAL CHARACTERISTICS (ALL SPEED OPTIONS)

(VCC= +3.0V to 3.6V, TA= 0°C to +70°C.)

Serial Clock Frequency f

Input Pulse Width (LE, CLK) T

Data Setup to Clock t

Data Hold from Clock t

Data Setup to Enable t

Data Hold to Enable t

Enable Setup to Clock t

Enable Hold from Clock t

LE to Q Valid t

LE to Q High-Z t

CLK to Q Valid t

CLK to Q Invalid t

Parallel Input to Delay Valid t

Parallel Input to Delay Invalid t

LE to Delay Valid t

LE to Delay Invalid t

Power-Up Time t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

CLK

W

DSC

DHC

DSE

DHE

ES

EH

EQV

EQZ

CQV

CQX

PDV

PDX

EDV

EDX

PU

10 MHz

50 ns

30 ns

0ns

30 ns

0ns

0ns

30 ns

50 ns

050ns

50 ns

0ns

500 ns

0ns

500 ns

0ns

100 ms

DS1123L

3.3V, 8-Bit, Programmable Timing Element

4 ______________________________________________________________________

AC ELECTRICAL CHARACTERISTICS (DS1123L-25)

(VCC= +3.0V to 3.6V, TA= 0°C to +70°C.)

Reference Delay t

Delay Step Size t

Step-Zero Delay with Respect
to IN

Step-Zero Delay with Respect
to REF

Maximum Delay with Respect
to IN

Delay with Respect to REF t

Delay with Respect to REF
Tolerance

Voltage Delay Variation (Notes 7, 9) -1 +1 %

Temperature Delay Variation VCC = 3.3V (Notes 7, 9) -2.5 +2.5 %

Integral Nonlinearity (Deviation
from Straight Line)

OUT Delta Delay t

IN High to PWM High t

Minimum PWM Output Pulse
Width

Minimum Input Pulse Width t

Minimum Input Period (Note 15) 80 ns

Input Rise and Fall Times tr, t

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

REF

STEP

t

D0

t

D0REF

t

DMAX

DREF

Δt

DREF

t

DREF

Δt

DV

t

DREF

Δt

DT

t

DREF

t

err

INV0

PWM0

t

PWM

WI

(Notes 3, 4) 18 22 ns

TA = +25°C 0 0.25 1.75 ns

(Notes 4, 5) 16.5 22 ns

(Notes 6, 7) -2.5 -1.5 0 ns

(Notes 4, 8) 80 ns

Position FO (Notes 7, 9) 60 ns

VCC = 3.3V, TA = +25°C
(Notes 7, 9)

(Note 10) -2 0 +2 ns

(Note 11) 0 1 2.5 ns

(Notes 4, 12) 16.5 22 ns

(Note 13) 5 ns

(Note 14) 40 ns

(Note 16) 0 1 µs

f

-0.75 +0.75 %

DS1123L

3.3V, 8-Bit, Programmable Timing Element

_____________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS (DS1123L-50)

(VCC= +3.0V to 3.6V, TA= 0°C to +70°C.)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Reference Delay t

Delay Step Size t

Step-Zero Delay with Respect
to IN

Step-Zero Delay with Respect
to REF

Maximum Delay with Respect
to IN

Delay with Respect to REF t

Delay with Respect to REF
Tolerance

Voltage Delay Variation (Notes 7, 9) -0.75 +0.75 %

Temperature Delay Variation VCC = 3.3V (Notes 7, 9) -2.5 +2.5 %

Integral Nonlinearity (Deviation
from Straight Line)

OUT Delta Delay t

IN High to PWM High t

Minimum PWM Output Pulse
Width

Minimum Input Pulse Width t

Minimum Input Period (Note 15) 80 ns

Input Rise and Fall Times tr, t

REF

STEP

t

D0

t

D0REF

t

DMAX

DREF

Δt

DREF

t

DREF

Δt

DV

t

DREF

Δt

t

DREF

t

err

INV0

PWM0

t

PWM

WI

(Notes 3, 4) 18 22 ns

TA = +25°C

(Notes 4, 5) 16.5 22 ns

(Notes 6, 7) -2.5 -1.5 0 ns

(Notes 4, 8) 144 ns

Position FF (Notes 7, 9) 127.5 ns

VCC = 3.3V, TA = +25°C
(Notes 7, 9)

DT

(Note 10) -2 0 +2 ns

(Note 11) 0 1 2.5 ns

(Notes 4, 12) 16.5 22 ns

(Note 13) 5 ns

(Note 14) 40 ns

(Note 16) 0 1 µs

f

0 0.5 1.75 ns

-0.75 +0.75 %