DS1123LE-25 Maxim Integrated Products, DS1123LE-25 Datasheet - Page 13

• Manufacturer Part Number: DS1123LE-25
• Description: Delay Lines / Timing Elements 3.3V, 8-Bit, Program mable Timing Element
• Manufacturer: Maxim Integrated Products

Specifications of DS1123LE-25

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

To achieve the best results when using the DS1123L,
decouple the power supply with a 0.01µF and a 0.1µF
capacitor. Use high-quality, ceramic, surface-mount
capacitors, and mount the capacitors as close as possi-
ble to the V
mize lead inductance. The DS1123L may not perform as
specified if good decoupling practices are not followed.
When using the serial-programming mode, the unused
parallel inputs must be connected to V
vent them from floating and drawing excessive current.
Table 1. DS1123L Delay Line/PWM Ranges and Tolerances
* This is the maximum delay in normal mode (MS = 0) measured with respect to the reference output, and the maximum pulse width
in monostable vibrator mode (MS = 1).
Table 2. DS1123L Adjustable Oscillator Characteristics
* Maximum output frequency depends on the actual step-zero delay value. Worst-case values are shown in the table. Output period
is equal to 2 x tD, where tD = delay value referenced to IN.
Figure 10. Output Timing Diagram for MS = 1
DS1123L-25
DS1123L-50
DS1123L-100
DS1123L-200
DS1123L-25
DS1123L-50
DS1123L-100
DS1123L-200
PWM
PART
PART
OUT
Unused Inputs When Using the Serial-
IN
CC
3.3V, 8-Bit, Programmable Timing Element
and GND pins of the DS1123L to mini-
Application Information
STEP SIZE
PERIOD CHANGE/STEP
t
D
t
REF
Power-Supply Decoupling
(ns)
0.25
0.5
1.0
2.0
(ns)
0.5
1.0
2.0
4.0
Programming Mode
MAX DELAY TIME AND
MAX PULSE WIDTH*
CC
____________________________________________________________________
63.75
127.5
or GND to pre-
(ns)
255
510
MIN OSCILLATOR FREQUENCY
MAX INTEGRAL
NONLINEARITY
(MHz)
0.98
INPUT:
Ambient Temperature:
Supply Voltage (V
Input Pulse:
Source Impedance:
Rise and Fall Times:
Pulse Width:
Period:
OUTPUT: The outputs are loaded with a 74F04. Delay
is measured between the 1.5V level of the rising or
falling edge of the input signal and the corresponding
edge of the output signal.
NOTE: Above conditions are for test only and do not
restrict the operation of the device under other data
sheet conditions.
6.6
3.6
1.9
(ns)
±2
±2
±4
±5
FREQUENCY
CC
MAX INPUT
):
(MHz)
MAX OSCILLATOR FREQUENCY*
25
25
25
25
25°C ± 3°C
3.3V ± 0.1V
High = 3.0V ± 0.1V
Low = 0.0V ± 0.1V
50Ω (Max)
3.0ns (Max) (Measured
Between 0.6V and 2.4V)
500ns
1µs
Test Conditions
(MHz)
MIN INPUT PULSE
22
22
22
22
WIDTH
(ns)
40
40
40
40
13