74LVT2952PW 查看數據表（PDF） - Philips Electronics
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74LVT2952PW Datasheet PDF : 12 Pages
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Philips Semiconductors
3.3V Octal registered transceiver (3-State)
Product specification
74LVT2952
AC CHARACTERISTICS
GND = 0V; tR = tF = 2.5ns; CL = 50pF, RL = 500Ω; Tamb = –40°C to +85°C.
SYMBOL
PARAMETER
WAVEFORM
fMAX
Maximum clock frequency
1
tPLH
Propagation delay
tPHL
CPBA to An, CPAB to Bn
1
tPZH
Output enable time
3
tPZL
OEBA to An, OEAB to Bn
4
tPHZ
Output disable time
3
tPLZ
OEBA to An, OEAB to Bn
4
NOTE:
1. All typical values are at VCC = 3.3V and Tamb = 25°C.
AC SETUP REQUIREMENTS
GND = 0V; tR = tF = 2.5ns; CL = 50pF, RL = 500Ω; Tamb = –40°C to +85°C.
SYMBOL
PARAMETER
WAVEFORM
ts(H)
ts(L)
Setup time
An to CPAB or Bn to CPBA
2
tn(H)
tn(L)
Hold time
An to CPAB ro Bn to CPBA
2
ts(H)
ts(L)
Setup time
CEAB to CPAB or CEBA to CPBA
2
tn(H)
tn(L)
Hold time
CEAB to CPAB or CEBA to CPBA
2
tW(H)
tW(L)
CPAB or CPBA pulse width
High or Low
1
LIMITS
VCC = 3.3V ± 0.3V
MIN
TYP1
MAX
150
200
1.3
3.1
6.1
1.8
3.8
6.0
1.0
3.4
5.6
1.2
3.6
6.5
1.0
3.7
6.3
1.6
3.4
5.1
VCC = 2.7V
MAX
7.1
6.9
6.7
8.0
6.9
5.3
UNIT
MHz
ns
ns
ns
LIMITS
VCC = 3.3V ± 0.3V
MIN
TYP1
2.5
1
2.5
1
1.5
–0.5
2.5
–0.5
0.9
0.3
2.4
–0.3
1.5
0.3
2.5
0
3.3
1
3.3
1
VCC = 2.7V
MIN
2.8
3.0
0.7
2.6
0.8
2.7
0.7
2.6
3.3
3.3
UNIT
ns
ns
ns
ns
ns
AC WAVEFORMS
VM = 1.5V, VIN = GND to 2.7V
CPBA or
CPAB
An or Bn
1/fMAX
1.5V
1.5V
tw(H)
tPHL
tw(L)
1.5V
1.5V
tPLH
1.5V
2.7V
0V
VOH
VOL
SV00040
Waveform 1. Propagation Delay, Clock Input to Output, Clock
Pulse Width, and Maximum Clock Frequency
ÉÉÉ ÉÉÉÉÉÉÉÉÉÉ An,Bn
ÉÉÉ ÉÉÉÉÉÉÉÉÉÉ CEAB,
ÉÉÉ ÉÉÉÉÉÉÉÉÉÉ CEBA
1.5V 1.5V
1.5V 1.5V
2.7V
0V
ts(H)
th(H)
ts(L)
th(L)
CPAB,
CPBA
1.5V
1.5V
2.7V
0V
NOTE: The shaded areas indicate when the input is permitted
to change for predictable output performance.
SV00131
Waveform 2. Data Setup and Hold Times
1998 Feb 19
6
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