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TC74HC4538のメーカーはToshiba Semiconductorです、この部品の機能は「DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR」です。 |
部品番号 | TC74HC4538 |
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部品説明 | DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR | ||
メーカ | Toshiba Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとTC74HC4538ダウンロード(pdfファイル)リンクがあります。 Total 14 pages
TC74HC4538AP/AF/AFT
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74HC4538AP,TC74HC4538AF,TC74HC4538AFT
Dual Retriggerable Monostable Multivibrator
The TC74HC4538A is a high speed CMOS MONOSTABLE
MULTIVIBRATOR fabricated with silicon gate C2MOS
technology.
It achieves the high speed operation similar to equivalent
LSTTL while maintaining the CMOS low power dissipation.
There are two trigger inputs, A input (positive edge input), and
B input (negative edge input). These inputs are valid for a slow
rise/fall time signal (tr = tf = 1 s) as they are schmitt trigger
inputs.
After triggering, the output stays in a MONOSTABLE state for
the time period determined by the external resistor and capacitor
(RX, CX). A low level at CD input breaks this STABLE STATE.
In the MONOSTABLE state, if a new trigger is applied, it makes
the MONOSTABLE period longer (retrigger mode).
Limitations for CX and RX are as follows:
External capacitor CX ........... No limitation
External resistor RX .............. VCC = 2.0 V more than 5 kΩ
VCC ≥ 3.0 V more than 1 kΩ
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
Features (Note)
• High speed: tpd = 25 ns (typ.) at VCC = 5 V
• Low power dissipation
Stand by state: ICC = 4 μA (max) at Ta = 25°C
Active state: ICC = 300 μA (max) at Ta = 25°C
• High noise immunity: VNIH = VNIL = 28% VCC (min)
• Output drive capability: 10 LSTTL loads
• Symmetrical output impedance: |IOH| = IOL = 4 mA (min)
• Balanced propagation delays: tpLH ∼− tpHL
• Wide operating voltage range: VCC (opr) = 2 V to 6 V
• Pin and function compatible with 4538B
Note: In the case of using only one circuit, CD should be
tied to GND, T1·T2·Q· Q should be tied to OPEN, the other
inputs should be tied to VCC or GND.
TC74HC4538AP
TC74HC4538AF
TC74HC4538AFT
Weight
DIP16-P-300-2.54A
SOP16-P-300.1.27A
TSSOP16-P-0044-0.65A
: 1.00 g (typ.)
: 0.18 (typ.)
: 0.06 g (typ.
1 2012-02-29
1 Page Block Diagram (Note 1)(Note 2)
TC74HC4538AP/AF/AFT
A
B
4
5
DX
CX
12
RX
VCC
T1 T2
6Q
7Q
3
CD
A
B
12
11
DX
CX
15 14
RX
VCC
T1 T2
10 Q
13
CD
9Q
Note 1: CX, RX, DX are external.
Capacitor, resistor, and diode, respectively.
Note 2: External clamping diode, DX
The external capacitor is charged to VCC level in the wait state, i.e. when no trigger is applied. Supply
voltage is turned off and CX is discharged mainly through the internal (parasitic) diode. If CX is sufficiently
large and VCC drops rapidly, there will be some possibility of damaging the IC by rush current or latch-up. If
the capacitance of the supply voltage filter is large enough and VCC drops slowly, the rush current is
automatically limited and damage to the IC is avoided.
The maximum value of forward current through the parasitic diode is ±20 mA.
In the case of a large CX, the limitation of fall time of the supply voltage is determined as follows:
tf ≥ (VCC − 0.7) CX/20 mA
(tf is the time from the voltage supply turning off to the level of supply voltage reaching 0.4 VCC.)
In the care of a system that does not satisfy the above condition, an external clamping diode is needed to
protect the IC from rush current.
3 2012-02-29
3Pages Absolute Maximum Ratings (Note 1)
TC74HC4538AP/AF/AFT
Characteristics
Symbol
Rating
Unit
Supply voltage range
DC input voltage
DC output voltage
Input diode current
Output diode current
DC output current
DC VCC/ground current
Power dissipation
Storage temperature
VCC
VIN
VOUT
IIK
IOK
IOUT
ICC
PD
Tstg
−0.5 to 7
−0.5 to VCC + 0.5
−0.5 to VCC + 0.5
±20
±20
±25
±50
500 (DIP) (Note 2)/180 (SOP/TSSOP)
−65 to 150
V
V
V
mA
mA
mA
mA
mW
°C
Note 1:
Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Note 2: 500 mW in the range of Ta = −40°C to 65°C. From Ta = 65°C to 85°C a derating factor of −10 mW/°C
should be applied up to 300 mW.
Operating Ranges (Note 1)
Characteristics
Symbol
Rating
Unit
Supply voltage
Input voltage
Output voltage
Operating temperature
Input rise and fall time
( CD only)
External capacitor
External resistor
VCC
VIN
VOUT
Topr
tr, tf
CX
RX
2 to 6
0 to VCC
0 to VCC
−40 to 85
0 to 1000 (VCC = 2.0 V)
0 to 500 (VCC = 4.5 V)
0 to 400 (VCC = 6.5 V)
No limitation (Note 2)
≥ 5 k (Note 5) (VCC = 2.0 V)
≥ 1 k (Note 5) (VCC ≥ 3.0 V)
V
V
V
°C
ns
F
Ω
Note 1: The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VCC or GND.
Note 2: The maximum allowable values of CX and RX are a function of leakage of capacitor CX, the leakage of
TC74HC4538A, and leakage due to board layout and surface resistance.
Susceptibility to externally induced noise signals may occur for RX > 1 MΩ.
6 2012-02-29
6 Page | |||
ページ | 合計 : 14 ページ | ||
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PDF ダウンロード | [ TC74HC4538 データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
TC74HC4538 | DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR | Toshiba Semiconductor |
TC74HC4538A | DUAL RETRIGGERABLE MONOSTABLE MULTIVIBRATOR | Toshiba Semiconductor |
TC74HC4538AF | Dual Retriggerable Monostable Multivibrator | Toshiba Semiconductor |
TC74HC4538AFT | Dual Retriggerable Monostable Multivibrator | Toshiba Semiconductor |