HD74CBT3245A [RENESAS]
Octal FET Bus Switch; 八路FET总线开关
| 型号： | HD74CBT3245A |
| 厂家： | 
RENESAS TECHNOLOGY CORP |
| 描述： | Octal FET Bus Switch |
| 文件： | 总12页 (文件大小：209K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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HD74CBT3245A
Octal FET Bus Switch
ADE-205-642 (Z)
Preliminary
Rev. 0
August 2001
Description
The HD74CBT3245A provides eight bits of high speed TTL-ca standard ’245
device pinout. The low on state resistance of the switch e with minimal
propagation delay. The device is organized as one 8-be (OE) is low, the
switch is on, and port A is connected to port B. is open, and the high
impedance state exists between the two ports.
Features
•
•
•
•
•
Standard ’245 type pinout.
Minimal propagation delay thro
5 Ω switch connection betw
TTL-compatible input le
Ultra low quiescent
-Ideally suited fo
HD74CBT3245A
Function Table
Input OE
Function
L
A port = B port
Disconnect
H
H:
L:
High level
Low level
Pin Arrangement
1
2
16
15
14
13
12
11
NC
A1
B2
B3
B4
B5
B6
B7
B8
3
A2
4
A3
5
A4
6
A5
(Top view)
Rev.0, Aug. 2001, page 2 of 2
HD74CBT3245A
Absolute Maximum Ratings
Item
Symbol
Ratings
−0.5 to 7.0
−0.5 to 7.0
−50
Unit
V
Conditions
Supply voltage range
Input voltage range *1
Input clamp current
Continuous output current
Continuous current through
VCC
VI
V
IIK
mA
mA
mA
VI < 0
IO
128
VO = 0 to VCC
ICC or IGND
100
VCC or GND
Maximum power dissipation
at Ta = 25°C (in still air) *2
PT
757
mW
TSSOP
Storage temperature
Tstg
−65 to 150
Notes:
The absolute maximum ratings are values which must not iceeded, and
furthermore, no two of which may be realized at the sam
1. The input and output voltage ratings may be exceedet clamp-current
ratings are observed.
2. The maximum package power dissipation was perature of 150°C.
Recommended Operating Conditions
Item
Sym
.5
5.5
5
Unit
V
Conditions
Supply voltage range
Input voltage range
Output voltage range
Input transition rise or fall
Operating free-air tem
V
V
ns / V
°C
VCC = 4.5 to 5.5 V
−40
85
Note: Unused or h or low.
Rev.0, Aug. 2001, page 3 of 3
HD74CBT3245A
Block Diagram
18
11
2
A1
B1
•
•
•
•
•
•
9
A8
B8
19
OE
Rev.0, Aug. 2001, page 4 of 4
HD74CBT3245A
DC Electrical Characteristics
(Ta = −40 to 85°C)
Item
Symbol
VCC (V)
Min
Typ*1
Max
−1.2
Unit
V
Test conditions
Clamp diode voltage VIK
4.5
IIN = −18 mA
Input voltage
VIH
VIL
4.0 to 5.5 2.0
V
4.0 to 5.5
4.5
0.8
7
On-state switch
resistance *2
RON
5
Ω
VIN = 0 V,
IIN = 64 mA
4.5
4.5
5
7
VIN = 0 V,
IIN = 30 mA
10
15
VIN = 2.4 V,
= 15 mA
Input current
IIN
0 to 5.5
5.5
.5 V or GND
Off-state leakage
current
IOZ
≤ VCC
Quiescent supply
current
ICC
5.5
5.5
VIN = VCC or GND,
IO = 0 mA
Increase in ICC
per input *3
∆ICC
One input at 3.4 V,
other inputs at VCC or
GND
Notes:
For condition shown as Min ues under recommended operating
conditions.
1. All typical values are oted), Ta = 25°C.
2. Measured by the vB terminals at the indicated current through the
switch. On-state lower voltage of the two (A or B) terminals.
3. This is the inh input that is at the specified TTL voltage level
rather tha
Capacitance
(Ta = 25°C)
Item
Symbol VCC (V)
Min
Typ
Max
Unit
Test conditions
Control input
capacitance
CIN
5.0
3.5
pF
VIN = 0 or 3 V
Input / output
capacitance
CI/O (OFF)
5.0
5
pF
V = 0 or 3 V
OOE = VCC
Note: This parameter is determined by device characterization is not production tested.
Rev.0, Aug. 2001, page 5 of 5
HD74CBT3245A
Switching Characteristics
(Ta = −40 to 85°C)
•
VCC = 4.0 V
Test
conditions
FROM
(Input)
TO
(Output)
Item
Symbol
Min
Max
Unit
Propagation delay
time *1
tPLH
tPHL
0.35
ns
CL = 50 pF
RL = 500 Ω
A or B
B or A
A or B
A or B
Enable time
tZH
tZL
7.2
7.4
ns
ns
CL = 50 pF
RL = 500 Ω
OE
Disable time
tHZ
tLZ
CL = 50
RL =
OE
•
VCC = 5.0 0.5 V
M
put)
TO
(Output)
Item
Symbol
Min
Max
Propagation delay
time *1
tPLH
tPHL
0.2
A or B
B or A
A or B
A or B
Enable time
tZH
tZL
1.9
2.
pF
500 Ω
OE
Disable time
tHZ
tLZ
L = 50 pF
RL = 500 Ω
OE
Note: 1. The propagation denstant of the typical on-state resistance of the
switch and the sdriven by an ideal voltage source (zero output
impedance).
Rev.0, Aug. 2001, page 6 of 6
HD74CBT3245A
Test Circuit
See under table
OPEN
GND
S1
500 Ω
*1
CL = 50 pF
500 Ω
Load circuit for outputs
Symbol
tPLH/ tPHL
tZH / tHZ
tZL / tL
S1
OP
Note: 1. CL ince.
Rev.0, Aug. 2001, page 7 of 7
HD74CBT3245A
Waveforms – 1
tr
tf
3 V
90 %
1.5 V
90 %
1.5 V
Input
10 %
10 %
tPHL
GND
VOH
tPLH
1.5 V
Output
VOL
Waveforms – 2
tf
3 V
90 %
1.5 V
Output
Control
10
GND
3.5 V
tLZ
Waveform - A
Waveform - B
VOL + 0.3 V
VOH - 0.3 V
VOL
VOH
tHZ
1.5 V
GND
Notes: 1. All input pulses are supplied by generators having the following characteristics :
PRR ≤ 10 MHz, ZO = 50 Ω, tr ≤ 2.5 ns, tf ≤ 2.5 ns.
2. Waveform - A is for an output with internal conditions such that the output is low except
when disabled by the output control.
3. Waveform - B is for an output with internal conditions such that the output is high except
when disabled by the output control.
4. The output are measured one at a time with one transition per measurement.
Rev.0, Aug. 2001, page 8 of 8
HD74CBT3245A
Package Dimensions
As of January, 2001
Unit: mm
6.50
6.80 Max
20
11
1
10
0.65
1.0
*0.22 +0.08
0.20 0.06
−
0.07
0.13
M
6.40 0.20
0.65 Max
0.10
TTP-20DA
*Dimension including the plating thickness
Base material dimension
ference value)
0.07 g
Rev.0, Aug. 2001, page 9 of 9
HD74CBT3245A
Disclaimer
1. Hitachi neither warrants nor grants licenses of any rights of Hitachi’s or any third party’s patent,
copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiationstallation
conditions and other characteristics. Hitachi bears no responsige when used
beyond the guaranteed ranges. Even within the guaranteed seeable
failure rates or failure modes in semiconductor devices auch as fail-
safes, so that the equipment incorporating Hitachi prory, fire or other
consequential damage due to operation of the Hita
5. This product is not designed to be radiation resi
6. No one is permitted to reproduce or duplicart of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any ent or Hitachi semiconductor
products.
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Copyright © Hitachi, Ltd., 2001. All rights reserved. Printed in Japan.
Colophon 5.0
Rev.0, Aug. 2001, page 10 of 10
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