Datasheet
Table Of Contents
t
CES
t
CS
D27 D26 D25 D24
t
CH
t
CWH
t
CWL
D23 D0 A3 A2 A1 A0
MSB LSB
DATAuWire
CLKuWire
LEuWire
t
ES
t
EWH
LMK01000
SNAS437G –FEBRUARY 2008–REVISED OCTOBER 2009
www.ti.com
Electrical Characteristics
(1)
(continued)
(3.15 V ≤ Vcc ≤ 3.45 V, -40 °C ≤ T
A
≤ 85 °C, Differential Inputs/Outputs; except as specified. Typical values represent most
likely parametric norms at Vcc = 3.3 V, T
A
= 25 °C, and at the Recommended Operation Conditions at the time of product
characterization and are not guaranteed).
Symbol Parameter Conditions Min Typ Max Units
Digital MICROWIRE Interfaces
(11)
V
IH
High-Level Input Voltage 1.6 Vcc V
V
IL
Low-Level Input Voltage 0.4 V
I
IH
High-Level Input Current V
IH
= Vcc -5.0 5.0 µA
I
IL
Low-Level Input Current V
IL
= 0 -5.0 5.0 µA
MICROWIRE Timing
t
CS
Data to Clock Set Up Time See Data Input Timing 25 ns
t
CH
Data to Clock Hold Time See Data Input Timing 8 ns
t
CWH
Clock Pulse Width High See Data Input Timing 25 ns
t
CWL
Clock Pulse Width Low See Data Input Timing 25 ns
t
ES
Clock to Enable Set Up Time See Data Input Timing 25 ns
t
CES
Enable to Clock Set Up Time See Data Input Timing 25 ns
t
EWH
Enable Pulse Width High See Data Input Timing 25 ns
(11) Applies to CLKuWire, DATAuWire, and LEuWire.
Serial Data Timing Diagram
Data bits set on the DATAuWire signal are clocked into a shift register, MSB first, on each rising edge of the
CLKuWire signal. On the rising edge of the LEuWire signal, the data is sent from the shift register to the
addressed register determined by the LSB bits. After the programming is complete the CLKuWire, DATAuWire,
and LEuWire signals should be returned to a low state. The slew rate of CLKuWire, DatauWire, and LEuWire
should be at least 30 V/µs.
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