Document
74LV244
Octal buffer/line driver; 3-state
Rev. 4 — 1 March 2016
Product data sheet
1. General description
The 74LV244 is a low-voltage Si-gate CMOS device and is pin and function compatible with 74HC244 and 74HCT244.
The 74LV244 is an octal non-inverting buffer/line driver with 3-state outputs. The output enable inputs 1OE and 2OE control the 3-state outputs. A HIGH on nOE causes the outputs to assume a high impedance OFF-state. The 74LV244 is identical to the 74LV240 but has non-inverting outputs.
2. Features and benefits
Wide operating voltage: 1.0 V to 5.5 V Optimized for low voltage applications: 1.0 V to 3.6 V Accepts TTL input levels between VCC = 2.7 V and VCC = 3.6 V Typical VOLP (output ground bounce) < 0.8 V at VCC = 3.3 V; Tamb = 25 C Typical VOHV (output VOH undershoot) > 2 V at VCC = 3.3 V; Tamb = 25 C Complies with JEDEC standard no. 7A Multiple package options ESD protection:
HBM JESD22-A114F exceeds 2000 V MM JESD22-A115-A exceeds 200 V
3. Ordering information
Table 1. Ordering information
Type number Package
Temperature range
74LV244D
40 C to +125 C
74LV244DB 40 C to +125 C
74LV244PW 40 C to +125 C
Name Description
Version
SO20
plastic small outline package; 20 leads; body width 7.5 mm SOT163-1
SSOP20 plastic shrink small outline package; 20 leads; body width 5.3 mm
SOT339-1
TSSOP20 plastic thin shrink small outline package; 20 leads; body width 4.4 mm
SOT360-1
NXP Semiconductors
4. Block diagram
74LV244
Octal buffer/line driver; 3-state
Fig 1. Functional diagram
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Fig 2. Logic symbol
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Fig 3. IEC logic symbol
74LV244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 1 March 2016
© NXP Semiconductors N.V. 2016. All rights reserved.
2 of 15
NXP Semiconductors
74LV244
Octal buffer/line driver; 3-state
5. Pinning information
5.1 Pinning
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Fig 4. Pin configuration SO20, SSOP20 and TSSOP20
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5.2 Pin description
Table 2. Pin description Symbol 1OE, 2OE 1A0, 1A1, 1A2, 1A3 2Y0, 2Y1, 2Y2, 2Y3 GND 2A0, 2A1, 2A2, 2A3 1Y0, 1Y1, 1Y2, 1Y3 VCC
Pin 1, 19 2, 4, 6, 8 3, 5, 7, 9 10 17, 15, 13, 11 18, 16, 14, 12 20
6. Functional description
Description output enable input (active LOW) data input bus output ground (0 V) data input bus output supply voltage
Table 3. Input nOE L L H
Function table[1]
nAn L H X
Output nYn L H Z
[1] H = HIGH voltage level; L = LOW voltage level; X = don’t care; Z = high-impedance OFF-state.
74LV244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 1 March 2016
© NXP Semiconductors N.V. 2016. All rights reserved.
3 of 15
NXP Semiconductors
74LV244
Octal buffer/line driver; 3-state
7. Limiting values
Table 4. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol
Parameter
Conditions
Min Max Unit
VCC supply voltage IIK input clamping current IOK output clamping current IO output current
VI < 0.5 V or VI > VCC + 0.5 V VO < 0.5 V or VO > VCC + 0.5 V 0.5 V < VO < VCC + 0.5 V
0.5 +7.0 V - 20 mA - 50 mA - 35 mA
ICC IGND Tstg Ptot
supply current ground current storage temperature total power dissipation
Tamb = 40 C to +125 C SO20
- 70 mA 70 - mA 65 +150 C
[1] -
500 mW
SSOP20 and TSSOP20
[2] -
400 mW
[1] For SO20 packages: Ptot derates linearly with 8 mW/K above 70 C. [2] For SSOP20 and TSSOP20 packages: Ptot derates linearly with 5.5 mW/K above 60 C.
8. Recommended operating conditions
Table 5. Symbol VCC VI VO Tamb
Operating conditions Parameter supply voltage input voltage output voltage ambient temperature
Conditions
t/V
input transition rise and fall rate
VCC = 1.0 V to 2.0 V VCC = 2.0 V to 2.7 V VCC = 2.7 V to 3.6 V VCC = 3.6 V to 5.5 V
Min [1] 1.0
0 0 40 40 0 0 0 0
Typ Max Unit
3.3 5.5 V
-
VCC
V
-
VCC
V
- +85 C
- +125 C
- 500 ns/V
- 200 ns/V
- 100 ns/V
- 50 ns/V
[1] The LV is guaranteed to function down to VCC = 1.0 V (input levels GND or VCC). DC characteristics are guaranteed from VCC = 1.2 V to VCC = 5.5 V.
74LV244
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 1 March 2016
© NXP Semiconductors N.V. 2016. All rights reserved.
4 of 15
NXP Semiconductors
74LV244
Octal buffer/line driver; 3-state
9. Static characteristics
Table 6. Static characteristics Over recommended operating conditions. Voltages are referenced to GND (ground = 0 V).
Symbol.