参数资料
型号: SN74CBT3245ADWR
厂商: Texas Instruments, Inc.
英文描述: Customer Specific 3.3 and 5V 25MBd MOST Transmitter with Driver IC (ODIN)
中文描述: 八路FET总线开关
文件页数: 10/15页
文件大小: 519K
代理商: SN74CBT3245ADWR
SN74CBT3245A
OCTAL FET BUS SWITCH
SCDS002Q NOVEMBER 1992 REVISED DECEMBER 2004
4
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC = 4 V
VCC = 5 V
± 0.5 V
UNIT
PARAMETER
(INPUT)
(OUTPUT)
MIN
MAX
MIN
MAX
UNIT
tpd
A or B
B or A
0.35
0.25
ns
ten
OE
A or B
6.4
1.9
5.9
ns
tdis
OE
A or B
5.7
2.1
6
ns
The propagation delay is the calculated RC time constant of the typical on-state resistance of the switch and the specified load capacitance, when
driven by an ideal voltage source (zero output impedance).
PARAMETER MEASUREMENT INFORMATION
VOH
VOL
From Output
Under Test
CL = 50 pF
(see Note A)
LOAD CIRCUIT
S1
7 V
Open
GND
500
500
tPLH
tPHL
Output
Control
Output
Waveform 1
S1 at 7 V
(see Note B)
Output
Waveform 2
S1 at Open
(see Note B)
tPZL
tPZH
tPLZ
tPHZ
1.5 V
3 V
0 V
1.5 V
VOH
VOL
0 V
1.5 V
VOL + 0.3 V
1.5 V
VOH 0.3 V
0 V
Input
3 V
3.5 V
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
Output
tpd
tPLZ/tPZL
tPHZ/tPZH
Open
7 V
Open
TEST
S1
NOTES: A. CL includes probe and jig capacitance.
B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control.
C. All input pulses are supplied by generators having the following characteristics: PRR
≤ 10 MHz, ZO = 50 , tr ≤ 2.5 ns,
tf ≤ 2.5 ns.
D. The outputs are measured one at a time, with one transition per measurement.
E. tPLZ and tPHZ are the same as tdis.
F. tPZL and tPZH are the same as ten.
G. tPLH and tPHL are the same as tpd.
H. All parameters and waveforms are not applicable to all devices.
Figure 1. Load Circuit and Voltage Waveforms
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