mc68194 ON Semiconductor, mc68194 Datasheet - Page 22

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mc68194

Manufacturer Part Number
mc68194
Description
Carrier Band Modem Cbm
Manufacturer
ON Semiconductor
Datasheet

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DC ELECTRICAL CHARACTERISTICS (cont.)−
POWER SUPPLY DRAIN CURRENT
VCM
ONE−SHOT
JABBER TIMER
CRYSTAL OSCILLATOR
AC ELECTRICAL CHARACTERISTICS††
(T
†† See Figure 9−2 for AC test load.
Power Supply Drain Current
VCM Oscillator
Frequency
VCM Tuning Ratio
VCX Tuning Range
SET−PW Output Voltage HIGH
SET−PW Output Voltage LOW
Timing Current
Internal Resistor
Timing Reference Voltage
(measured at RPW pin)
External Timing Resistor
External Timing Capacitor
RC Threshold High
RC Output V
Jabber Resistor
Jabber Capacitor
Input HIGH Voltage
Input LOW Voltage
TXCLK Period
RXCLK Period
TTL Rise/Fall Time
TXSYMX, SMREQ* Setup Time
(to TXCLK)
TXSYMX, SMREQ* Hold Time
(to TXCLK)
RXSYMX, SMIND* Delay Time
(to RXCLK)
XTAL1,2 to TXCLK Delay
TXOUT, TXOUT* Rise/Fall Time
UP*, DOWN* Rise/Fall Time
TXDIS Rise/Fall Time
A
= 0−70°C, V
Characteristic
Characteristic
OL
CC
= 5.0 Vdc "5%)
t
t
RXSYM delay
TXCLK delay
t
Symbol
Symbol
t
JAB
t
t
PW
PW
JAB
TXOUT"
RXperiod
TXperiod
TXDIS"
t
F
F
R
C
R
C
t
t
TTL"
V
V
t
R
V
setup
PD"
I
V
TR
V
hold
osc1
osc2
CC
IT
EXT
EXT
JAB
JAB
CX
CX
ref
VOH
int
IH
VOL
IL
VOL
VIH
OTHER PARAMETERS − (T
http://onsemi.com
Min
Min
180
180
2.6
1.2
3.0
0
22
Limits
Limits
4.25
−9.0
Typ
Typ
220
300
120
200
200
4.0
4.2
3.6
0.8
1.3
1.5
0.4
2.2
4.0
2.5
1.5
1.5
40
20
33
15
18
35
Max
Max
270
125
220
220
4.6
4.0
1.4
2.0
5.0
25
0
A
= 25°C, V
Ohms
Unit
MHz
MHz
Unit
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
mA
mA
μF
pF
ns
ns
ns
ns
ns
ns
ns
ns
CC
= 5.0 Vdc)
No outputs loaded, TTL inputs
open.
C
VCX = 3.6 Vdc
C
VCX = 3.6 Vdc
I
I
IT = 0.8 mA
For 5.0 Mb/s data rate.
For 5.0 Mb/s data rate.
I
I
For 0.5 sec timing
For 0.5 sec timing
XTAL1 & XTAL2 tied together
XTAL1 & XTAL2 tied together
@ 5.0 MHz, Figure 9−1A.
@ 5.0 MHz, PLL locked to TXCLK,
Figure 9−1B.
Figure 9−1A.
Figure 9−1A.
Figure 9−1A.
Figure 9−1B.
Figure 9−1C. XTAL1 and XTAL2 tied
together and driven with external
source.
R
R
2.0 kΩ pullup to V
Figure 9−2 test load.
OH
OL
IN
OL
vcm
vcm
pulldown
pulldown
= 5.0 μA Max
= 10 mA
= 5.0 mA
= 5.0 mA
= 24 pF, RXCLK = 5.0 MHz,
= 68 pF, RXCLK = 10 MHz,
Test Conditions
Test Conditions
= 500 Ω
= 500 Ω
CC
. Do not use

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