Rainbow Electronics DS1802 - Manual (Page 15)

DS1802
15 of 17
AC ELECTRICAL CHARACTERISTICS (-40
°
C to +85
°
C; V
CC
=2.7V to 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
CLK Frequency f
CLK
DC 10 MHz 10,13
Width of CLK Pulse t
CH
50 ns 10,13
Data Setup Time t
DC
30 ns 10,13
Data Hold Time t
CDH
10 ns 10,13
Propagation Delay Time
Low to High Level
Clock to Output t
PLH
50 ns 10,13
Propagation Delay Time
Low to High Level t
PLH
50 ns 10,13
RST High to Clock Input High
t
CC
50 ns 10,13
RST Low to Clock Input High
t
HLT
50 ns 10,13
CLK Rise Time t
CR
50 ns 10,13
RST Inactive
t
RLT
200 ns 10,13
AC ELECTRICAL CHARACTERISTICS (PUSHBUTTON INPUTS)
(-40
°
C to +85
°
C; V
CC
=2.7V to 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Single Pulse Input t
CPW
1 DC ms 3,5,13
Repetitive Input Pulse High Time t
HPW
1 DC ms 3,5,13
Continuous Input Pulse t
CCP
1 DC s 3,5,13
NOTES:
1. All voltages are referenced to ground.
2. Valid for V
CC
=5V only.
3. Both UCx and DCx inputs are internally pulled up with a 50K
Ω
resistance.
4. Capacitance values apply at 25
°
C.
5. Input pulse width is the minimum time required for an input to cause an increment or decrement. If
the UCx or DCx inputs is held active for longer than 1 second, subsequent increments or decrements
will occur on 100 ms intervals until the inputs UCx, DCx are released to V
IH
. Timing tolerances for
pushbutton control is
±
30%.
6. Inter-channel matching is used to determine the relative voltage difference in dB between the same
tap position on each potentiometer. The DS1802 is specified for
±
0.5 dB inter-channel matching.