Rev 2; 8/07
3.3V, 8-Bit, Programmable Timing Element
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.
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
Applications
Ordering Information
Telecommunications
TEMP
RANGE
PART
Digital Test Equipment
Digital Video Projection
PINSTEP SIZE/
PACKAGE
NO. OF STEPS
(150-mil)
DS1123LE-25
0°C to +70°C 16 TSSOP
0.25/256
DS1123LE-50
0°C to +70°C 16 TSSOP
0.5/256
DS1123LE-100
0°C to +70°C 16 TSSOP
1/256
DS1123LE-200
Signal Generators and Analyzers
0°C to +70°C 16 TSSOP
2/256
Pin Configuration
Typical Operating Circuit
IN
LE
SYSTEM
CLOCK
OUT/OUT
(OPTIONAL) Q/P0
MICROPROCESSOR
3-WIRE
INTERFACE
CLK/P1
4
P/S
DS1123L
VARIABLE
DELAY/PHASE
OUTPUT
P7
D/P2
P6
P3
MS
P4
GND
IN 1
16 VCC
LE 2
TOP VIEW
3.3V
VCC
15 OUT/OUT
P0/Q
3
P1/CLK
4
14 P/S
DS1123L
13 P7
P2/D 5
REFERENCE
OUTPUT
P5
REF/PWM
12 P6
P3 6
11 MS
P4 7
10 P5
GND 8
9
REF/PWM
_____________________________________________ Maxim Integrated Products
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.
1
DS1123L
General Description
