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參數(shù)資料
| 型號： | 935084690112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | F/FAST SERIES, OCTAL 1-BIT TRANSCEIVER, TRUE OUTPUT, PDSO24 |
| 封裝： | 7.50 MM, PLASTIC, MS-013, SOT-137-1, SO-24 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大小： | 111K |
| 代理商： | 935084690112 |
Philips Semiconductors
Product data
74F657
Octal transceiver with 8-bit parity generator/checker
2003 Feb 04
7
AC ELECTRICAL CHARACTERISTICS
LIMITS
Tamb = +25 °C
Tamb = 0 °C to +70 °C
Tamb = –40 °C to +85 °C
SYMBOL
PARAMETER
TEST
VCC = +5.0 V
VCC = +5.0 V ± 10%
UNIT
CONDITION
CL = 50 pF,
RL = 500
CL = 50 pF,
RL = 500
CL = 50 pF,
RL = 500
MIN
TYP
MAX
MIN
MAX
MIN
MAX
tPLH
tPHL
Propagation delay
An to Bn or Bn to An
Waveform 2
2.5
3.0
5.5
6.0
7.5
2.5
3.0
8.0
2.0
2.5
9.0
ns
tPLH
tPHL
Propagation delay
An to PARITY
Waveform 1, 2
7.0
10.0
14.0
15.0
7.0
16.0
5.5
6.5
16.5
19.0
ns
tPLH
tPHL
Propagation delay
ODD/EVEN to PARITY,
ERROR
Waveform 1, 2
4.5
7.5
8.0
11.0
11.5
4.5
12.0
12.5
3.5
4.0
13.0
15.5
ns
tPLH
tPHL
Propagation delay
Bn to ERROR
Waveform 1, 2
8.0
14.0
20.5
7.5
22.5
7.5
24.5
25.0
ns
tPLH
tPHL
Propagation delay
PARITY to ERROR
Waveform 1, 2
8.0
11.5
12.0
15.5
7.5
8.0
16.5
17.0
6.5
18.5
20.0
ns
tPZH
tPZL
Output enable time1
to HIGH or LOW level
Waveform 3, 4
3.0
4.0
5.5
7.0
8.0
9.5
3.0
4.0
9.0
11.0
2.0
4.0
9.0
13.0
ns
tPHZ
tPLZ
Output disable time
from HIGH or LOW level
Waveform 3, 4
2.0
4.5
4.0
7.5
6.0
2.0
8.0
6.5
1.0
8.0
7.5
ns
NOTE:
1. These delay times reflect the 3-state recovery time only and not the signal through the buffers or the parity check circuitry. To assure VALID
information at the ERROR pin, time must be allowed for the signal to propagate through the drivers (B to A), through the parity check
circuitry (same as A to PARITY), and to the ERROR output. VALID data at the ERROR pin
≥ (B to A) + (A to PARITY).
AC WAVEFORMS
For all waveforms, VM = 1.5 V.
VM
tPLH
tPHL
An, Bn,
ODD/EVEN,
PARITY
PARITY,
ERROR
SF00418
Waveform 1. Propagation delay for inverting outputs
VM
tPHL
tPLH
An, Bn,
PARITY,
ERROR
An, Bn,
ODD/EVEN,
PARITY
SF00420
Waveform 2. Propagation delay for non-Inverting outputs
VM
tPHZ
tPZH
OE
VOH -0.3V
0V
An, Bn,
PARITY,
ERROR
SF00419
Waveform 3. 3-state output enable time to HIGH level and output
disable time from HIGH level
VM
tPLZ
tPZL
OE
VOL +0.3V
3.5V
An, Bn,
PARITY,
ERROR
SF00421
Waveform 4. 3-state output enable time to LOW level and output
disable time from LOW level
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