RI-CTL-MB2B-30 Datasheet, PDF (37/40 Pages) Texas Instruments – Series 2000 Reader System

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3.2.1.5 ST33 – Input/Reset
PARAMETER
V_RESOH
V_RESOL
V_RESIL
V_IN0L, V_IN1L
V_IN0H, V_IN1H
I_ILL
t_RESOL
t_RESIL
DESCRIPTION
CONDITIONS
Reset high level output voltage,
ST33 pin 3
I_OH = 20 µA
Reset/watchdog circuit inactive.
See and DTR=VDTRL (RS-232
version) ⁽¹⁾
Reset low level output voltage,
ST33 pin 3
I_OL = 10 µA
Reset/watchdog circuit inactive.
See DTR=V_DTRL (RS-232
version) ⁽²⁾
Reset low level input voltage,
ST33 pin 3
Output disabled; V_O = 12 V
Low level input voltage for input 0
and input 1
High level input voltage for input 0
and input 1
Input leak current
Reset output low-level pulse
duration
0 ≤ V_IN < +V_CC2
Reset input low-level pulse
duration
Electrical Data
MIN
TYP
3.8
4.1
MAX
V_CC2
UNIT
V
0.8
V
0.8 V
0.8 V
2.2
V_CC2 – 0.3
V
–1
1 µA
10
16
ms
10
16
ms
(1) _{Differential input/output voltage is measured at the non-inverting terminals RX+/TX+ with respect to the inverting terminals}
RX-/TX-.
(2) _{A reset of the Rest/watchdog circuit is initiated if:}
• The logic supply voltage (V_CC2) is below 4.65 Volt
• The watchdog is not periodically retriggered within 50 ms
3.2.1.6 Indicator Outputs
PARAMETER
DESCRIPTION
V_OH
V_OL
V_IL
t_{OK_TRG}
t_{OK_DELAY}
High level output voltage
Low level output voltage
Low level output current
Low level trigger signal pulse width
Delay to the low-to-high transition of the
trigger signal
CONDITIONS
I_OL = 100 mA
MIN
(1)₄₀
(2)₅₀
TYP
MAX UNIT
10
V
1
V
290 mA
50
µs
70
90 ms
(1) _{The OK_LED (ON) and the OK_LED(OFF) functions of the S2000 software library can be used to generate a trigger signal.}
(2) _{The pulse extension circuit is only added for the OK-signal.}
3.2.1.7 ST31 – RFM RXSS Tuning Inputs
For the electrical characteristics of the RXSA input, please refer to the relevant RFM manual.
SCBU044 (11-09-21-077) – January 2008
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Specifications
37