TL16C554 Datasheet, PDF (6/33 Pages) Texas Instruments – ASYNCHRONOUS COMMUNICATIONS ELEMENT

TL16C554, TL16C554I
ASYNCHRONOUS COMMUNICATIONS ELEMENT
SLLS165D – JANUARY 1994 – REVISED JULY 1998
recommended operating conditions
Supply voltage, VCC
Clock high-level input voltage at XTAL1, VIH(CLK)
Clock low-level input voltage at XTAL1, VIL(CLK)
High-level input voltage, VIH
Low-level input voltage, VIL
Clock frequency, fclock
Operating free-air temperature, TA
TL16C554
TL16C554I
MIN
4.75
2
– 0.5
2
– 0.5
0
–40
NOM
5
MAX
5.25
VCC
0.8
VCC
0.8
16
70
85
UNIT
V
V
V
V
V
MHz
°C
°C
electrical characteristics over recommended ranges of operating free-air temperature and supply
voltage (unless otherwise noted)
VOH‡
VOL‡
IIkg
IOZ
PARAMETER
High-level output voltage
Low-level output voltage
Input leakage current
High-impedance output
current
TEST CONDITIONS
IOH = – 1 mA
IOL = 1.6 mA
VCC = 5.25 V,
VI = 0 to 5.25 V,
GND = 0,
All other terminals floating
VCC = 5.25 V,
GND = 0, VO = 0 to 5.25 V,
Chip selected in write mode or chip deselected
MIN TYP†
2.4
MAX
0.4
UNIT
V
V
± 10 µA
± 20 µA
ICC
Supply current
VCC = 5.25 V,
TA = 25°C,
RX, DSR, DCD, CTS, and RI at 2 V,
All other inputs at 0.8 V, XTAL1 at 4 MHz,
No load on outputs,
Baud rate = 50 kilobits per second
Ci(XTAL1) Clock input capacitance
Co(XTAL2) Clock output capacitance
Ci
Input capacitance
VCC = 0,
VSS = 0,
All other terminals grounded,
TA = 25°C
Co
Output capacitance
† _{All typical values are at VCC = 5 V, TA = 25°C.}
‡ _{These parameters apply for all outputs except XTAL2.}
f = 1 MHz,
50 mA
15
20 pF
20
30 pF
6
10 pF
10
20 pF
clock timing requirements over recommended ranges of operating free-air temperature and supply
voltage (see Figure 1)
tw1
Pulse duration, clock high (external clock)
tw2
Pulse duration, clock low (external clock)
tw3
Pulse duration, RESET
MIN
31
31
1000
MAX
UNIT
ns
ns
ns
6
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