ACS101A Semtech Corporation, ACS101A Datasheet - Page 8

• Manufacturer Part Number: ACS101A
• Description: Acapella Optical Modem ic
• Manufacturer: Semtech Corporation

Absolute Maximum Ratings
Note 1: Input current is mainly attributed to pull-up resistor, so it applies when input is low. The
Operating Conditions
Static Digital Output Characteristics (for specified operating conditions)
Output pins: RxD, CTS, DSR, DCDB, LIN, ERD, XLO, RxCL, TxCL(output).
Static Digital Input Characteristics (for specified operating conditions)
Input pins: DR1/2/3/4, DP1/2/3, DM1/2/3, CKC, RSS, TxD, RTS, DTR, XTI, DI, PORB, TxCL(input).
Note 2: XLO does not have a drive capability other than that of the load presented by a parallel resonant
(VDD = VD+ or VA+)
(non-supply pins)
(except LDN,LDP,CNT,VG)
( LDN,LDP,CNT)
Storage temperature
(VA+ and VD+)
Power supply VD+ and VA+
Input voltage
Input current
Input current
Power supply
Ambient temperature range
(except XTI and TxCL)
Vin High
Vin Low
Vin High (PORB, XTI)
Vin Low (PORB, XTI)
Pull-up resistor
Input current (Note 1)
Vout Low (Iout = 4mA)
Vout High (Iout = 4mA)
Max load capcitance
XLO (Note 2)
ACS101A Issue 1.2 October 1999.
high input current is <
crystal and appropriate padding capacitor.
Parameter
Parameter
Parameter
Parameter
+
/-10 µA.
Symbol
Symbol
Symbol
Symbol
VDD
Tstor
Voh
V+
TA
Vol
Vih
Vih
PU
Vin
Vil
Vil
Iin
Cl
Iin
Iin
-
VDD-
Min
0.8 *
VD+
4.75
Min
Min
GND - 0.3
-40
50k
0.5
2.0
0
-
-
-
-
-
Min
-0.3
-50
-
-
125k
Typ
Typ
Typ
5.0
-
-
-
-
-
-
-
-
-
-
VDD +
Max
10.0
160
6.0
0.3
1.0
Max
Max
0.2 *
VD+
340k
Max
5.25
100
0.5
0.8
50
85
-
-
-
-
Units
Units
Units
Units
mA
mA
ºC
µA
pF
pF
V
V
ºC
V
V
V
V
V
V
V
8
Dynamic Characteristics
Note 4: The LED is switched on for approximately 1/5th of the time, with a cycle of 160 µs at
Note 5: The ACS101A is at its best with low capacitance LEDs - Acapella is able to supply LEDs with
Note 6: The ACS101A incorporates a differential receiver front end.
Matching Characteristics (for specified operating conditions)
Crystal frequency
(XTI, XTO)
Synchronous
(with TxCL = output)
(with TxCL = input)
(Note 3)
Crystal tolerance
GND
average curent:
(Note 4)
(Note 5)
External clock (XTI)
High or Low time
RxD and TxD data rate
Asynchronous Short range:
RxCL and TxCL duty cycle
Frequency deviation at TxCL
from selected value
TxD to TxCL set-up time
TxD to TxCL hold time
RxD to RxCL set-up time
RxD to RxCL hold time
Digital output - fall time
Digital output - rise time
Power consumption:
TRC floating (or 100kOhm)
TRC tied to GND
use parallel resonant crystal and
recommended padding capacitors
Amplifier sensitivity
input current
Maximum amplifier input current
Rtrc placed between TRC and
LED current with TRC floating
peak current:
LED capacitance
with Vr = 0 Volts
LED leakage current
Vr = 1.8 Volts
LED reverse bias (Note 6)
Note 3: Power consumption assumes that digital outputs drive CMOS loads. includes LED.
9.216MHz.
lower than 20pF capacitance.
compatible with the ACS101 is still selectable by connecting VG, pin 38, low, in which case the
LED reverse bias will be as specified for the ACS101, 1.3 to 1.8v.
Parameter
Parameter
Short range:
Standard:
Double:
Standard:
Double:
Symbol
Symbol Min
fckc
twh
tsur
tsut
twl
Fd
thr
Imax
frc
fcl
tht
Pc
Cled
Rtrc
tf
Irec
Icur
tr
Ct
Vr
Cl
Min
DC
DC
DC
300
-100
4.8
40
2.4
9.6
500
25
70
14
5
-
-
-
-
-
-
-
0
1
-
-
-
*1/RxCL
*1/RxCL
9.216
Typ
155
Typ
50
85
0.5
0.5
0
2
0
-
-
-
-
-
1
-
-
-
-
-
-
-
Single ended reception,
Max
Max
76.8
38.4
19.2
100
130
100
100
512
256
500
100
100
230
120
26
19
60
64
-
-
-
-
-
-
-
-
-
Units
Units
MHz
kbps
ppm
ppm
mW
mA
mA
nA
pF
nA
%
%
ns
ns
ns
ns
ns
V
s