RENESAS HD74CBT3257

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April 1, 2003
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HD74CBT3257
4-bit 1-of-2 FET Multiplexer / Demultiplexer
ADE-205-624B (Z)
Rev. 2
Nov. 2001
Description
The HD74CBT3257 is a 4-bit 1-of-2 high-speed TTL-compatible FET multiplexer / demultiplexer. The
low on-state resistance of the switch allows connections to be made with minimal propagation delay.
Output enable (OE) and select control (S) inputs select the appropriate B1 and B2 outputs for the A-input
data.
Features
• Minimal propagation delay through the switch.
• 5 Ω switch connection between two ports.
• TTL-compatible input levels.
• Ultra low quiescent power.
-Ideally suited for notebook applications.
• Package type
Product code example: HD74CBT3257TELL
Package type
Package code
Package suffix
Taping code
TSSOP-16pin
TTP-16DA
T
ELL(2000pcs / Reel)
Notes: 1. As for the Pb-free package is attached the “V” to the end of package code.
2. As for the Pb-free product is attached the “–E” to the end of product code.
HD74CBT3257
Function Table
Inputs
OE
S
Function
L
L
A port = B1 port
L
H
A port = B2 port
H
X
Disconnect
H:
L:
X:
High level
Low level
Immaterial
Pin Arrangement
S
1
16 VCC
1B1
2
15 OE
1B2
3
14 4B1
1A
4
13 4B2
2B1
5
12 4A
2B2
6
11 3B1
2A
7
10 3B2
GND
8
9
(Top view)
Rev.2, Nov. 2001, page 2 of 11
3A
HD74CBT3257
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
VCC
−0.5 to 7.0
V
VI
−0.5 to 7.0
V
Input clamp current
IIK
−50
mA
VI < 0
Continuous output current
IO
128
mA
VO = 0 to VCC
Continuous current through
VCC or GND
ICC or IGND
±100
mA
Maximum power dissipation
*2
at Ta = 25°C (in still air)
PT
500
mW
Storage temperature
Tstg
−65 to 150
°C
Supply voltage range
Input voltage range
Notes:
*1
Conditions
TSSOP
The absolute maximum ratings are values which must not individually be exceeded, and
furthermore, no two of which may be realized at the same time.
1. The input and output voltage ratings may be exceeded even if the input and output clamp-current
ratings are observed.
2. The maximum package power dissipation was calculated using a junction temperature of 150°C.
Recommended Operating Conditions
Item
Symbol
Min
Max
Unit
Supply voltage range
VCC
4.0
5.5
V
Input voltage range
VI
0
5.5
V
Output voltage range
VI/O
0
5.5
V
Input transition rise or fall rate
∆t / ∆v
0
5
ns / V
Operating free-air temperature
Ta
−40
85
°C
Conditions
VCC = 4.5 to 5.5 V
Note: Unused or floating inputs must be held high or low.
Rev.2, Nov. 2001, page 3 of 11
HD74CBT3257
Block Diagram
1A
4
2
1B1
3
1B2
2A
7
5
2B1
6
2B2
3A
9
11
3B1
10
3B2
4A
12
14
4B1
13
4B2
S
OE
1
15
Rev.2, Nov. 2001, page 4 of 11
HD74CBT3257
DC Electrical Characteristics
(Ta = −40 to 85°C)
Item
Symbol
Clamp diode voltage
Input voltage
On-state switch
*2
resistance
Typ
*1
VCC (V)
Min
Max
Unit
Test conditions
VIK
4.5

VIH
4.0 to 5.5
2.0

−1.2
V
IIN = −18 mA


V
VIL
4.0 to 5.5


0.8
RON
4.0

14
20
4.5

5
7
VIN = 0 V,
IIN = 64 mA
4.5

5
7
VIN = 0 V,
IIN = 30 mA
4.5

10
15
VIN = 2.4 V,
IIN = 15 mA
Ω
VIN = 2.4 V,
IIN = 15 mA
Typ at VCC = 4.0 V
Input current
IIN
0 to 5.5


±1.0
µA
VIN = 5.5 V or GND
Off-state leakage
current
IOZ
5.5


±1.0
µA
0 ≤ A, B ≤ VCC
Quiescent supply
current
ICC
5.5


3
µA
VIN = VCC or GND,
IO = 0 mA
Increase in ICC
*3
per input
∆ICC
5.5


2.5
mA
One input at 3.4 V,
other inputs at VCC or
GND
Notes:
For condition shown as Min or Max use the appropriate values under recommended operating
conditions.
1. All typical values are at VCC = 5 V (unless otherwise noted), Ta = 25°C.
2. Measured by the voltage drop between the A and B terminals at the indicated current through the
switch. On-state resistance is determined by the lower voltage of the two (A or B) terminals.
3. This is the increase in supply current for each input that is at the specified TTL voltage level
rather than VCC or GND.
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
CI/O (OFF)
5.0

9

pF
VO = 0 or 3 V
5.0

5

Input / output
A port
capacitance
B port
OE = VCC
Note: This parameter is determined by device characterization is not production tested.
Rev.2, Nov. 2001, page 5 of 11
HD74CBT3257
Switching Characteristics
(Ta = −40 to 85°C)
•
VCC = 4.0 V
Test
conditions
FROM
(Input)
TO
(Output)
ns
CL = 50 pF
RL = 500 Ω
A or B
B or A
5.5
ns
CL = 50 pF
RL = 500 Ω
S
A

5.7
ns
S
B

5.6
CL = 50 pF
RL = 500 Ω
OE
A or B
CL = 50 pF
RL = 500 Ω
S
B
OE
A or B
5.2
S
B

6.4
OE
A or B
Test
conditions
FROM
(Input)
TO
(Output)
Item
Symbol
Min
Max
Unit
Propagation delay
*1
time
tPLH
tPHL

0.35
Propagation delay
time
tPLH
tPHL

Enable time
tZH
tZL
tHZ

5.2

5.5

Disable time
tLZ
•
ns
VCC = 5.0±0.5 V
Item
Symbol
Min
Max
Unit
Propagation delay
*1
time
tPLH
tPHL

0.25
ns
CL = 50 pF
RL = 500 Ω
A or B
B or A
Propagation delay
time
tPLH
tPHL
1.6
5.0
ns
CL = 50 pF
RL = 500 Ω
S
A
Enable time
tZH
tZL
1.6
5.2
ns
S
B
1.8
5.1
CL = 50 pF
RL = 500 Ω
OE
A or B
tHZ
1.0
5.0
S
B
2.2
5.5
CL = 50 pF
RL = 500 Ω
OE
A or B
1.0
5.0
S
B
2.2
6.8
OE
A or B
Disable time
tLZ
Note:
ns
1. 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).
Rev.2, Nov. 2001, page 6 of 11
HD74CBT3257
Test Circuit
See under table
500 Ω
S1
OPEN
GND
*1
CL = 50 pF
500 Ω
Load circuit for outputs
Symbol
S1
t PLH / tPHL
OPEN
t ZH / t HZ
OPEN
t ZL / t LZ
7V
Note: 1. CL includes probe and jig capacitance.
Rev.2, Nov. 2001, page 7 of 11
HD74CBT3257
Waveforms – 1
tr
tf
90 %
1.5 V
Input
3V
90 %
1.5 V
10 %
10 %
t PLH
GND
t PHL
V OH
1.5 V
Output
1.5 V
V OL
Waveforms – 2
tf
tr
90 %
Output
Control
3V
90 %
1.5 V
1.5 V
10 %
t ZL
10 %
GND
t LZ
3.5 V
Waveform - A
1.5 V
V OL + 0.3 V
t ZH
t HZ
V OH - 0.3 V
Waveform - B
V OL
V OH
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.2, Nov. 2001, page 8 of 11
HD74CBT3257
Package Dimensions
As of July, 2001
Unit: mm
4.40
5.00
5.30 Max
16
9
1
8
0.65
0.20 ± 0.06
1.0
0.13 M
6.40 ± 0.20
0.10
*Dimension including the plating thickness
Base material dimension
*0.17 ± 0.05
0.15 ± 0.04
1.10 Max
0.65 Max
0.07 +0.03
–0.04
0.08
*0.22 +– 0.07
0˚ – 8˚
0.50 ± 0.10
Hitachi Code
JEDEC
JEITA
Mass (reference value)
TTP-16DA
—
—
0.05 g
Rev.2, Nov. 2001, page 9 of 11
HD74CBT3257
As of July, 2001
Unit: mm
4.40
5.00
5.30 Max
16
9
1
8
0.65
1.0
0.13 M
6.40 ± 0.20
*Pd plating
Rev.2, Nov. 2001, page 10 of 11
0.10
*0.15 ± 0.05
1.10 Max
0.65 Max
0.07 +0.03
–0.04
*0.20 ± 0.05
0˚ – 8˚
0.50 ± 0.10
Hitachi Code
JEDEC
JEITA
Mass (reference value)
TTP-16DAV
—
—
0.05 g
HD74CBT3257
Disclaimer
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copyright, trademark, or other intellectual property rights for information contained in this document.
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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.
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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
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traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
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Copyright © Hitachi, Ltd., 2001. All rights reserved. Printed in Japan.
Colophon 5.0
Rev.2, Nov. 2001, page 11 of 11