74LVT16646ADGG(1998) 查看數據表（PDF） - Philips Electronics
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74LVT16646ADGG Datasheet PDF : 12 Pages
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Philips Semiconductors
3.3V 16-bit bus transceiver (3-State)
Product specification
74LVT16646A
nSBA or
nSAB
nAx or nBx
VM
tPHL
VM
VM
tPLH
VM
3.0V or VCC
0V
VOH
VOL
SH00032
Waveform 3. Propagation Delay, nSBA to nAx or nSAB to nBx
ÉÉÉÉ ÉÉÉÉÉÉÉÉÉ nAxor
nBx
VM
ÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ ts(H)
VM
th(H)
VM
ts(L)
VM
th(L)
3.0V
or
VCC
0V
3.0V
nCPBA or
nCPAB
VM
or
VCC
VM
0V
NOTE: The shaded areas indicate when the input is permitted
to change for predictable output performance.
SH00033
Waveform 4. Data Setup and Hold Times
nOE, nDIR
nDIR
nAx or nBx
VM
tPZH
VM
tPHZ
VM
3.0V or VCC
whichever
is less
0V
VOH
VY
0V
SH00034
Waveform 5. 3-State Output Enable Time to High Level and
Output Disable Time from High Level
nOE, nDIR
nDIR
nAx or nBx
VM
tPZL
VM
tPLZ
VM
3.0V or VCC
0V
3.0V or VCC
VX
VOL 0V
SH00035
Waveform 6. 3-State Output Enable Time to Low Level and
Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
VIN
PULSE
GENERATOR
VCC
D.U.T.
VOUT
6V
90%
OPEN
NEGATIVE
VM
RL
GND
PULSE
10%
tW
AMP (V)
90%
VM
10%
0V
tTHL (tF)
tTLH (tR)
RT
CL
RL
Test Circuit for 3-State Outputs
SWITCH POSITION
TEST
SWITCH
tPHZ/tPZH
tPLZ/tPZL
tPLH/tPHL
GND
6V
open
POSITIVE
PULSE
10%
tTLH (tR)
90%
VM
90%
VM
tW
VM = 1.5V
Input Pulse Definition
tTHL (tF)
AMP (V)
10%
0V
DEFINITIONS
RL = Load resistor; see AC CHARACTERISTICS for value.
CL = Load capacitance includes jig and probe capacitance;
see AC CHARACTERISTICS for value.
RT = Termination resistance should be equal to ZOUT of
pulse generators.
FAMILY
INPUT PULSE REQUIREMENTS
Amplitude Rep. Rate
tW
tR
tF
74LVT16
2.7V
≤10MHz 500ns ≤2.5ns ≤2.5ns
SW00003
1998 Feb 19
9
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