MC74LVQ646 Datasheet, PDF (5/10 Pages) Motorola, Inc – LOW-VOLTAGE CMOS OCTAL TRANSCEIVER/ REGISTERED TRANSCEIVER

MC74LVQ646
DYNAMIC SWITCHING CHARACTERISTICS (VCC = 3.3V)
Symbol
Characteristic
Condition
TA = +25°C
Min Typ Max Unit
VOLP
VOLV
VIHD
Dynamic LOW Peak Voltage (Note 1)
Dynamic LOW Valley Voltage (Note 1)
High Level Dynamic Input Voltage
(Note 2)
CL = 50pF, VIH = 3.3V, VIL = 0V
CL = 50pF, VIH = 3.3V, VIL = 0V
Input–Under–Test Switching 0V to Threshold,
f=1MHz
0.6
1.0
V
–0.5 –1.0
V
1.5
2.0
V
VILD
Low Level Dynamic Input Voltage
(Note 2)
Input–Under–Test Switching 3.3V to Threshold,
f=1MHz
1.5
0.8
V
1. Number of outputs defined as “n”. Measured with “n–1” outputs switching from HIGH–to–LOW. The remaining output is measured in the
LOW state.
2. Number of data inputs is defined as “n” switching, “n–1” inputs switching 0V to 3.3V.
AC CHARACTERISTICS1 (tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
Limits
Symbol
Parameter
TA = +25°C
TA = –40°C to +85°C
VCC = 3.0V to 3.6V
VCC = 2.7V
VCC = 3.0V to 3.6V VCC = 2.7V
Min Typ Max Min Typ Max Min
Max
Max
Unit
fmax
Clock Pulse Frequency
150
150
MHz
tPLH
tPHL
Propagation Delay
Clock to Output
1.5 12.5 15.0 1.5 14.0 18.0
1.5
17.0
20.0
ns
1.5 10.0 13.0 1.5 12.0 15.0
1.5
14.5
17.0
tPLH
tPHL
Propagation Delay
Input to Output
1.5 9.5 12.0 1.5 11.0 13.5
1.5
13.5
14.5
ns
1.5 8.0 11.0 1.5 9.5 12.5
1.5
12.0
14.0
tPLH
tPHL
Propagation Delay
Select to Output
1.5 9.5 12.0 1.5 11.0 13.0
1.5
13.0
14.5
ns
1.5 8.5 11.0 1.5 10.0 12.5
1.5
12.5
14.0
tPZH
tPZL
Output Enable Time
OE to An, Bn
1.5 8.0 10.5 1.5 9.5 12.0
1.5
11.0
13.0
ns
1.5 9.0 11.0 1.5 10.0 12.5
1.5
12.0
14.0
tPHZ
tPLZ
Output Disable Time
OE to An, Bn
1.5 9.0 11.0 1.5 10.5 12.5
1.5
12.0
14.0
ns
1.5 8.5 10.5 1.5 9.5 12.5
1.5
12.0
14.0
tPZH
tPZL
Output Enable Time
DIR to An, Bn
1.5 9.0 12.0 1.5 12.0 14.0
1.5
13.0
16.0
ns
1.5 10.0 12.0 1.5 11.0 14.0
1.5
12.5
16.0
tPHZ
tPLZ
Output Disable Time
DIR to An, Bn
1.5 9.0 11.0 1.5 10.0 13.0
1.5
12.0
15.0
ns
1.5 10.0 12.5 1.5 13.0 15.5
1.5
14.0
18.0
tOSHL
Output–to–Output Skew
1.0 1.5
1.0
1.5
1.5
ns
tOSLH
(Note 2)
1.0 1.5
1.0
1.5
1.5
1. These AC parameters are preliminary and may be modified prior to release. The maximum AC limits are design targets. Actual performance
will be specified upon completion of characterization.
2. Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device.
The specification applies to any outputs switching in the same direction, either HIGH–to–LOW (tOSHL) or LOW–to–HIGH (tOSLH); parameter
guaranteed by design.
AC OPERATING REQUIREMENTS (tR = tF = 2.5ns; CL = 50pF; RL = 500Ω)
Limits
TA = +25°C
VCC = 3.0V to 3.6V VCC = 2.7V
TA = –40°C to +85°C
VCC = 3.0V to 3.6V VCC = 2.7V
Symbol
Parameter
Min
Min
Min
Min
Unit
ts
Setup TIme, HIGH or LOW Dn to LE
2.5
4.0
2.5
4.5
ns
th
Hold TIme, HIGH or LOW Dn to LE
1.5
1.5
1.5
1.5
ns
tw
LE Pulse Width, HIGH
3.3
5.0
3.3
6.0
ns
LCX DATA
BR1478
5
MOTOROLA