74LVC2952AD 데이터 시트보기 (PDF) - Philips Electronics
부품명
상세내역
제조사
74LVC2952AD
Philips Electronics
74LVC2952AD Datasheet PDF : 11 Pages
| |||
Philips Semiconductors
Octal registered tranceiver with 5-volt tolerant
inputs/ouputs (3-State)
Product specification
74LVC2952A
AC WAVEFORMS
VM = 0.6 V at VCC = 1.2 V
VM = 1.0 V at VCC = 2.0 V
VM = 1.5 V at VCC = 3.0 V
VOL and VOH are the typical output voltage drop that occur with the
3-State output load.
VI
CPXX INPUT
GND
1/fmax
VM
tW
VOH
An, Bn
OUTPUT
VOL
tPHL
VM
tPLH
SV01720
Figure 1. Clock input (CPBA, CPAB) to output (Bn, An)
propagation delays, the clock pulse width
and the maximum clock frequency.
TEST CIRCUIT
VI
PULSE
GENERATOR
VCC
D.U.T.
RT
VO
CL 50pF
S1
500Ω
2 x VCC
Open
GND
500Ω
VCC
t 2.7V
2.7V – 3.6V
VI
VCC
2.7V
Test
tPLH/tPHL
tPLZ/tPZL
tPHZ/tPZH
S1
Open
2 x VCC
GND
SY00003
Figure 4. Load circuitry for switching times.
VI
An, Bn, CEnn
INPUT
VM
GND
th
th
tsu
tsu
VI
CPXX INPUT
VM
GND
SV01721
Figure 2. Set-up and hold times for the An, Bn and CEnn inputs.
NOTE:
The shaded areas indicate when the input is permitted to
change for predictable output performance
VI
CPXX INPUT
VM
GND
VCC
OUTPUT
LOW–to–OFF
OFF–to–LOW
VOL
tPLZ
VY
tPHZ
tPZL
VM
tPZH
VOH
OUTPUT
HIGH-to-OFF
OFF-to-HIGH
GND
outputs
enabled
VX
outputs
disabled
VM
outputs
enabled
SV01722
Figure 3. 3-State enable and disable times.
1998 Jul 29
6
Share Link: