74HC244N.-74HCT244N-74HCT244PW Fast Delivery |IC PHOENIX CO.,LIMITED

74HCT244PW ,Octal buffer, line driver; 3-stateGeneral descriptionThe 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The d ..
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74HCT245N ,Octal bus transceiver; 3-statefeatures an output enable input (OE) for easy cascading and a send/receive input (DIR)for direction ..
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74VHC32MTCX-NL , Quad 2-Input OR Gate
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74HC244N.-74HCT244N-74HCT244PW
Octal buffer, line driver; 3-state
1. General description
The 74HC244; 74HCT244 is an 8-bit buffer/line driver with 3-state outputs. The device
can be used as two 4-bit buffers or one 8-bit buffer. The device features two output
enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE
causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes
that enable the use of current limiting resistors to interface inputs to voltages in excess of
VCC.
2. Features and benefits Input levels: For 74HC244: CMOS level For 74HCT244: TTL level Octal bus interface Non-inverting 3-state outputs Complies with JEDEC standard no. 7 A ESD protection: HBM JESD22-A114F exceeds 2000V MM JESD22-A115-A exceeds 200V Multiple package options Specified from 40 Cto +85 C and 40 Cto +125C
3. Ordering information
74HC244; 74HCT244
Octal buffer/line driver; 3-state
Rev. 4 — 24 September 2012 Product data sheet
Table 1. Ordering information
74HC244N 40 Cto+125C DIP20 plastic dual in-line package; 20 leads (300 mil) SOT146-1
74HCT244N
74HC244D 40 Cto+125C SO20 plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
74HCT244D
74HC244DB 40 Cto+125C SSOP20 plastic shrink small outline package; 20 leads; body width 5.3 mm SOT339-1
74HCT244DB
74HC244PW 40 Cto+125C TSSOP20 plastic thin shrink small outline package; 20 leads;
body width 4.4 mm
SOT360-1
74HCT244PW
74HC244BQ 40 C to +125 C DHVQFN20 plastic dual-in-line compatible thermal enhanced
very thin quad flat package; no leads; 20 terminals;
body 2.5 4.5 0.85 mm
SOT764-1
74HCT244BQ
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
4. Functional diagram
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
5. Pinning information
5.1 Pinning
5.2 Pin description
Table 2. Pin description
1OE, 2OE 1, 19 output enable input (active LOW)
1A0, 1A1, 1A2, 1A3 2, 4, 6, 8 data input
2Y0, 2Y1, 2Y2, 2Y3 3, 5, 7, 9 bus output
GND 10 ground (0V)
2A0, 2A1, 2A2, 2A3 17, 15, 13, 11 data input
1Y0, 1Y1, 1Y2, 1Y3 18, 16, 14, 12 bus output
VCC 20 supply voltage
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
6. Functional description
[1] H= HIGH voltage level; L= LOW voltage level; X= don’t care; Z= high-impedance OFF-state.
7. Limiting values
[1] For DIP20 package: Ptot derates linearly with 12 mW/K above 70C.
[2] For SO20 packages: Ptot derates linearly with 8 mW/K above 70C.
For SSOP20 and TSSOP20 packages: Ptot derates linearly with 5.5 mW/K above 60C.
For DHVQFN20 packages: above 60 C, Ptot derates linearly with 4.5 mW/K.
8. Recommended operating conditions
Table 3. Function table[1]
LLL H Z
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
VCC supply voltage 0.5 +7 V
IIK input clamping current VI < 0.5 V or VI >VCC +0.5 V - 20 mA
IOK output clamping current VO< 0.5 V or VO >VCC +0.5V - 20 mA output current 0.5 V < VO < VCC +0.5V - 35 mA
ICC supply current - 70 mA
IGND ground current 70 - mA
Tstg storage temperature 65 +150 C
Ptot total power dissipation DIP20 package [1]- 750 mW
SO20, SSOP20, TSSOP20 and
DHVQFN20 packages
[2]- 500 mW
Table 5. Recommended operating conditions
74HC244
VCC supply voltage 2.0 5.0 6.0 V input voltage 0 - VCC V output voltage 0 - VCC V
t/V input transition rise and fall rate VCC = 2.0 V - - 625 ns/V
VCC = 4.5 V - 1.67 139 ns/V
VCC = 6.0 V - - 83 ns/V
Tamb ambient temperature 40 - +125 C
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
9. Static characteristics
74HCT244
VCC supply voltage 4.5 5.0 5.5 V input voltage 0 - VCC V output voltage 0 - VCC V
t/V input transition rise and fall rate VCC = 4.5 V - 1.67 139 ns/V
Tamb ambient temperature 40 - +125 C
Table 5. Recommended operating conditions …continued
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground=0V).
74HC244
VIH HIGH-level
input voltage
VCC= 2.0V 1.5 1.2 - 1.5 - 1.5 - V
VCC= 4.5V 3.15 2.4 - 3.15 - 3.15 - V
VCC= 6.0V 4.2 3.2 - 4.2 - 4.2 - V
VIL LOW-level
input voltage
VCC= 2.0V - 0.8 0.5 - 0.5 - 0.5 V
VCC= 4.5V - 2.1 1.35 - 1.35 - 1.35 V
VCC= 6.0V - 2.8 1.8 - 1.8 - 1.8 V
VOH HIGH-level
output voltage =VIHor VIL= 20 A; VCC= 2.0V 1.9 2.0 - 1.9 - 1.9 - V= 20 A; VCC= 4.5V 4.4 4.5 - 4.4 - 4.4 - V= 20 A; VCC= 6.0V 5.9 6.0 - 5.9 - 5.9 - V= 6.0 mA; VCC= 4.5V 3.98 4.32 - 3.84 - 3.7 - V= 7.8 mA; VCC= 6.0V 5.48 5.81 - 5.34 - 5.2 - V
VOL LOW-level
output voltage =VIHor VIL =20 A; VCC= 2.0V - 0 0.1 - 0.1 - 0.1 V =20 A; VCC= 4.5V - 0 0.1 - 0.1 - 0.1 V =20 A; VCC= 6.0V - 0 0.1 - 0.1 - 0.1 V =6.0 mA; VCC= 4.5V - 0.15 0.26 - 0.33 - 0.4 V =7.8 mA; VCC= 6.0V - 0.16 0.26 - 0.33 - 0.4 V input leakage
current =VCCor GND;
VCC =6.0V 0.1 - 1.0 - 1.0 A
IOZ OFF-state
output current
per input pin; VI =VIHor VIL; =VCC or GND;
other inputs at VCC or GND;
VCC =6.0 V; IO =0A 0.5 - 5.0 - 10 A
ICC supply current VI =VCCor GND; IO =0A;
VCC =6.0V - 8.0 - 80 - 160 A input
capacitance
-3.5 - - - - - pF
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
10. Dynamic characteristics
74HCT244
VIH HIGH-level
input voltage
VCC= 4.5 V to 5.5V 2.0 1.6 - 2.0 - 2.0 - V
VIL LOW-level
input voltage
VCC= 4.5 V to 5.5V - 1.2 0.8 - 0.8 - 0.8 V
VOH HIGH-level
output voltage =VIHor VIL; VCC =4.5V= 20A 4.4 4.5 - 4.4 - 4.4 - V=6 mA 3.98 4.32 - 3.84 - 3.7 - V
VOL LOW-level
output voltage =VIHor VIL; VCC =4.5V =20A - 0 0.1 - 0.1 - 0.1 V= 6.0 mA - 0.16 0.26 - 0.33 - 0.4 V input leakage
current =VCCor GND;
VCC =5.5V 0.1 - 1.0 - 1.0 A
IOZ OFF-state
output current
per input pin; VI =VIHor VIL; =VCC or GND;
other inputs at VCC or GND;
VCC =5.5 V; IO =0A 0.5 - 5.0 - 10 A
ICC supply current VI =VCCor GND;
VCC =5.5 V; IO =0A - 8.0 - 80 - 160 A
ICC additional
supply current
per input pin; =VCC 2.1V;
other inputs at VCCor GND;
VCC= 4.5Vto 5.5V; =0A 70 252 - 315 - 343 A input
capacitance
-3.5 - - - - - pF
Table 6. Static characteristics …continued
At recommended operating conditions; voltages are referenced to GND (ground=0V).
Table 7. Dynamic characteristics
GND=0 V; for load circuit see Figure8.
74HC244
tpd propagation delay nAn to nYn;
see Figure6
[1]
VCC = 2.0 V - 30 110 145 165 ns
VCC = 4.5 V - 11 22 28 33 ns
VCC = 5.0 V; CL =15pF - 9 - - - ns
VCC = 6.0 V - 9 19 24 28 ns
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
[1] tpd is the same as tPHL and tPLH.
[2] ten is the same as tPZH and tPZL.
[3] tdis is the same as tPHZ and tPLZ.
[4] tt is the same as tTHL and tTLH.
[5] CPD is used to determine the dynamic power dissipation (PD in W): =CPD VCC2fi N+  (CL VCC2 fo) where:= input frequency in MHz;= output frequency in MHz;= output load capacitance in pF;
VCC= supply voltage in V;= number of inputs switching;(CL VCC2fo)= sum of outputs.
ten enable time nOE to nYn; see Figure7 [2]
VCC = 2.0 V - 36 150 190 225 ns
VCC = 4.5 V - 13 30 38 45 ns
VCC = 6.0 V - 10 26 33 38 ns
tdis disable time nOE to nYn or see Figure7 [3]
VCC = 2.0 V - 39 150 190 225 ns
VCC = 4.5 V - 14 30 38 45 ns
VCC = 6.0 V - 11 26 33 38 ns transition time see Figure6 [4]
VCC = 2.0 V - 14 60 75 90 ns
VCC = 4.5 V - 5 12 15 18 ns
VCC = 6.0 V - 4 10 13 15 ns
CPD power dissipation
capacitance
per buffer; VI =GNDto VCC [5] -35- - - pF
74HCT244
tpd propagation delay nAn to nYn;
see Figure6
[1]
VCC = 4.5 V - 13 22 28 33 ns
VCC = 5.0 V; CL =15pF - 11 - - - ns
ten enable time nOE to nYn; VCC= 4.5 V; see
Figure7
[2] -15 3038 45 ns
tdis disable time nOE to nYn; VCC= 4.5 V; see
Figure7
[3] -15 2531 38 ns transition time VCC = 4.5 V; see Figure6 [4] - 5 12 15 18 ns
CPD power dissipation
capacitance
per buffer; =GNDto VCC 1.5V
[5] -35- - - pF
Table 7. Dynamic characteristics …continued
GND=0 V; for load circuit see Figure8.
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
11. Waveforms
Table 8. Measurement points
74HC244 0.5  VCC 0.5  VCC 0.1  VCC 0.9  VCC
74HCT244 1.3V 1.3V 0.1  VCC 0.9  VCC
NXP Semiconductors 74HC244; 74HCT244
Octal buffer/line driver; 3-state
Table 9. Test data
74HC244 VCC 6ns 15pF, 50 pF 1k open GND VCC
74HCT244 3V 6ns 15 pF, 50 pF 1k open GND VCC

Partno	Mfg	Dc	Qty	Available	Descript
74HC244N. \|74HC244N	NS	N/a	72	avai	Octal buffer, line driver; 3-state
74HCT244N	TI	N/a	295	avai	Octal buffer, line driver; 3-state
74HCT244PW	NXP	N/a	2500	avai	Octal buffer, line driver; 3-state