PDF HD74LV374A Data sheet ( Hoja de datos )

Número de pieza	HD74LV374A
Descripción	Octal Edge-Triggered D-type Flip-Flops with 3-state Outputs
Fabricantes	Hitachi Semiconductor
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No Preview Available ! HD74LV374A Octal Edge-Triggered D-type Flip-Flops with 3-state Outputs ADE-205-275 (Z) 1st Edition April 1999 Description The HD74LV374A has eight edge trigger D type flip flops with three state outputs in a 20 pin package. Data at the D inputs meeting set up requirements, are transferred to the Q outputs on positive going transitions of the clock input. When the clock input goes low, data at the D inputs will be retained at the outputs until clock input returns high again. When a high logic level is applied to the output control input, all outputs go to a high impedance state, regardless of what signals are present at the other inputs and the state of the storage elements. Low-voltage and high-speed operation is suitable for the battery-powered products (e.g., notebook computers), and the low-power consumption extends the battery life. Features • VCC = 2.0 V to 5.5 V operation • All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) • All outputs VO (Max.) = 5.5 V (@VCC = 0 V) • Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) • Typical VOH undershoot > 2.3 V (@VCC = 3.3 V, Ta = 25°C) • Output current ±8 mA (@VCC = 3.0 V to 3.6 V), ±16 mA (@VCC = 4.5 V to 5.5 V) Function Table Inputs OE CLK D Output Q HXXZ L↑LL L ↑ HH L ↓ X Q0 Note: H: High level L: Low level X: Immaterial Z: High impedance Q0: Output level before the indicated steady state input conditions were established. 1 page HD74LV374A DC Electrical Characteristics • Ta = –40 to 85°C Item Symbol Input voltage VIH VIL Output voltage VOH VCC (V)* 2.0 2.3 to 2.7 3.0 to 3.6 4.5 to 5.5 2.0 2.3 to 2.7 3.0 to 3.6 4.5 to 5.5 Min to Max Min 1.5 VCC × 0.7 VCC × 0.7 VCC × 0.7 — — — — VCC – 0.1 Typ — — — — — — — — — Max — — — — 0.5 VCC × 0.3 VCC × 0.3 VCC × 0.3 — Unit Test Conditions V V IOH = –50 µA 2.3 2.0 — 3.0 2.48 — 4.5 3.8 — VOL Min to — Max — — — — 0.1 IOH = –2 mA IOH = –8 mA IOH = –16 mA IOL = 50 µA Input current Off-state output current IIN IOZ 2.3 3.0 4.5 0 to 5.5 5.5 — — — — — — 0.4 IOL = 2 mA — 0.44 IOL = 8 mA — 0.55 IOL = 16 mA — ±1 µA VIN = 5.5 V or GND — ±5 µA VO = VCC or GND Quiescent supply current ICC 5.5 — — 20 µA VIN = VCC or GND, IO = 0 Output leakage IOFF 0 — —5 current µA VI or VO = 0 to 5.5 V Input CIN 3.3 — capacitance 2.9 — pF VI = VCC or GND Note: For conditions shown as Min or Max, use the appropriate values under recommended operating conditions. 5 5 Page HD74LV374A • Waveform – 1 Input CLK Input D Output Q • Waveform – 2 Input CLK tr tf 50 %VCC 10 % tr 90 % 90 % 10 % tf 90 % 90 % 10 % tPLH 10 % 50 %VCC tr tf 10 % tsu 90 % 90 % 50 % 50 % VCC VCC tw th 10 % tw 50 %VCC tPHL 50 %VCC 50 %VCC Input D 50 %VCC 50 %VCC • Waveform – 3 tf Input OE 90 % 50 %VCC 10 % Waveform – A Waveform – B tr 90 % 50 %VCC 10 % tZL tLZ 50 %VCC tZH tHZ 50 %VCC VOL + 0.3 V VOH – 0.3 V VCC GND VCC GND VOH VOL VCC GND VCC GND VCC GND VCC VOL VOH GND Notes: 1. tr ≤ 3 ns, tf ≤ 3 ns 2. Input waveform: PRR ≤ 1 MHZ, duty cycle 50% 3. Waveform-A is for an output with internal conditions such that the output is low except when disabled by the output control. 4. Waveform-B is for an output with internal conditions such that the output is high except when disabled by the output control. 11 11 Page

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