Document
HD74LVC533
Octal D-type Transparent Latches with 3-state Outputs
ADE-205-070B(Z) Rev.2 September 1995 Description
The HD74LVC533 has eight D type latches with three state outputs in a 20 pin package. When the latch enable input is high, the Q outputs will follow the D inputs. When the latch enable goes low, data at the D inputs will be retained at the outputs until latch enable 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 at the battery drive product (note type personal computer) and low power consumption extends the life of a battery for long time operation.
Features
• • • • • VCC = 2.0 V to 5.5 V All inputs VIH (Max.) = 5.5 V (@VCC = 0 V to 5.5 V) Typical VOL ground bounce < 0.8 V (@VCC = 3.3 V, Ta = 25°C) Typical VOH undershoot > 2.0 V (@VCC = 3.3 V, Ta = 25°C) High output current ±24 mA (@VCC = 3.0 V to 5.5 V)
Function Table
Inputs G H L L L H: L: X: Z: Q0 : LE X H H L D X L H X Output Q Z H L Q0
High level Low level Immaterial High impedance Level of Q before the indicated steady input conditions were established.
HD74LVC533
Pin Arrangement
G 1 1Q 2 1D 3 2D 4 2Q 5 3Q 6 3D 7 4D 8 4Q 9 GND 10
G Q D G Q D
20 VCC 19 8Q 18 8D 17 7D 16 7Q 15 6Q 14 6D 13 5D 12 5Q 11 LE
D G Q
D G Q
G Q D
G Q D
D G Q
D G Q
(Top view)
2
HD74LVC533
Absolute Maximum Ratings
Item Supply voltage Input diode current Input voltage Output diode current Symbol VCC I IK VI I OK Ratings –0.5 to 6.0 –50 –0.5 to 6.0 –50 50 Output voltage Output current VCC, GND current / pin Storage temperature VO IO I CC or IGND Tstg –0.5 to VCC +0.5 ±50 100 –65 to +150 Unit V mA V mA mA V mA mA °C VO = –0.5 V VO = VCC+0.5 V VI = –0.5 V Conditions
Note: 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.
Recommended Operating Conditions
Item Supply voltage Symbol VCC Ratings 1.5 to 5.5 2.0 to 5.5 Input / output voltage VI VO Operating temperature Output current Ta I OH 0 to 5.5 0 to V CC –40 to 85 –12 –24 I OL
*1 *2
Unit V V V V °C mA mA mA mA ns/V
Conditions Data retention At operation G, LE, D Q
VCC = 2.7 V VCC = 3.0 V to 5.5 V VCC = 2.7 V VCC = 3.0 V to 5.5 V
12 24
*2
Input rise / fall time
t r, t f
10
Notes: 1. This item guarantees maximum limit when one input switches. Waveform : Refer to test circuit of switching characteristics. 2. duty cycle ≤ 50%
3
HD74LVC533
Electrical Characteristics
Ta = –40 to 85°C Item Input voltage Symbol VCC (V) VIH 2.7 to 3.6 4.5 to 5.5 VIL 2.7 to 3.6 4.5 to 5.5 Output voltage VOH 2.7 to 5.5 2.7 3.0 3.0 4.5 VOL 2.7 to 5.5 2.7 3.0 4.5 Input current Off state output current I IN I OZ 0 to 5.5 5.5 5.5 3.0 to 3.6 Min 2.0 Max — Unit Test Conditions V V V V V V V V V V V V V µA µA µA µA VIN = 5.5 V or GND VIN = VCC, GND VO.