Document
HD74LVC16245A
16-bit Bus Transceivers with 3-state Outputs
ADE-205-120B(Z) 3rd Edition December 1996 Description
The HD74LVC16245A has sixteen two direction buffers, for the fittest at two direction bus lines with three state outputs. A direction control input, DIR. When DIR is high, data flows from the A inputs to the B outputs. When DIR is high, data flows from the B inputs to the A outputs. When enable inputs ( G) is high, disables both A and B ports by placing then in a high impedance. 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) All outputs VOUT (Max.) = 5.5 V (@VCC = 0 V or output off state) 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 L L H H: L: X: Z: High level Low level Immaterial High impedance DIR L H X Operation B data to A bus A data to B bus Z
HD74LVC16245A
Pin Arrangement
1DIR 1 1B1 2 1B2 3 GND 4 1B3 5 1B4 6 VCC 7 1B5 8 1B6 9 GND 10 1B7 11 1B8 12 2B1 13 2B2 14 GND 15 2B3 16 2B4 17 VCC 18 2B5 19 2B6 20 GND 21 2B7 22 2B8 23 2DIR 24
48 1G 47 1A1 46 1A2 45 GND 44 1A3 43 1A4 42 VCC 41 1A5 40 1A6 39 GND 38 1A7 37 1A8 36 2A1 35 2A2 34 GND 33 2A3 32 2A4 31 VCC 30 2A5 29 2A6 28 GND 27 2A7 26 2A8 25 2G
(Top view)
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HD74LVC16245A
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 Input / Output voltage VI/O –0.5 to VCC +0.5 –0.5 to 6.0 Output current VCC, GND current / pin Storage temperature IO I CC or IGND Tstg ±50 100 –65 to +150 Unit V mA V mA mA V V mA mA °C VI = –0.5 V G, DIR VO = –0.5 V VO = VCC+0.5 V Output "H" or "L" Output "Z" or VCC:OFF 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 VI/O 0 to 5.5 0 to V CC 0 to 5.5 Operating temperature Output current Ta I OH –40 to 85 –12 –24 I OL
*1 *2
Unit V V V V V °C mA mA mA mA ns/V
Conditions Data retention At operation G, DIR Output "H" or "L" Output "Z" or VCC:OFF
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%
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HD74LVC16245A
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 Output leak current Quiescent supply current I IN I OZ I OFF I CC ∆ I CC 0 to 5.5 2.7 to 5.5 0 2.7 to 3.6 2.7 to 5.5 3.0 to 3.6 Min 2.0 Max — Unit Test Conditions V V V I OH = –100 µA I OH = –12 mA
VCC×0.7 — — — 0.8
VCC ×0.3 V V V V V V V V V V µA µA µA µA µA µA VIN = 5.5 V or GND VIN = VCC, GND VOUT = 5.5 V or GND VIN / V OUT = 5.5 V VIN / V OUT = 3.6 to 5.5 V VIN = VCC or GND VIN = one input at(VCC–0.6)V, other inputs at V CC or GND I OL = 100 µA I OL = 12 mA I OL = 24 mA I OH = –24 mA
VCC–0.2 — 2.2 2.4 2.2 3.8 — — — — — — — — — — — — — — 0.2 0.4 0.55 0.55 ±5.0 ±5.0 20 ±20 20 500
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HD74LVC16245A
Switching Characteristics
Ta = –40 to 85°C Item Propagation delay time Symbol VCC (V) t PLH t PHL 2.7 3.3±0.3 5.0±0.5 Output enable time t ZH t ZL 2.7 3.3±0.3 5.0±0.5 Output disable time t HZ t LZ
*1
Min — 1.5 — — 1.5 — — 1.5 — — — — — —
Typ — — — — — — — — — — — — 3.0 15.0
Max 5.8 5.2 4.5 8.0 7.2 6.0 8.0 7.2 6.0 — 1.0 1.0 — —
Unit ns ns ns ns ns ns ns ns ns ns ns ns pF pF
From (Input) To (Output) A or B B or A
G
B or A
2.7 3.3±0.3 5.0±0.5
G
B or A
Between output pins skew
t OSLH t OSHL
2.7 3.3±0.3 5.0±0.5
Input capacitance Output capacitance Note:
CIN CO
2.7 2.7
1. This parameter is characterized but not tested. tosLH = | tPLHm – t PLHn |, tosHL = | tPHLm – t PHLn |
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HD74LVC16245A
Test Circuit
VCC VCC
G Output A1 S1 500 Ω S2 B1 CL = 50 pF 450 Ω 50 Ω Scope OPEN
*1 See under table
Input
Pulse generator Zout = 50 Ω
See Function Table
GND
DIR Symbol t PLH / t PHL t ZH/ t HZ t ZL / t LZ Notes: 1. 2. 3. CL includes probe and jig capacitance. A2-B2 to A8-B8 are identical to above load circuit. S1 : Input-Output change switch. S2
Vcc=2.7V, 3.3±0.3V Vcc=5.0±0.5V
OPEN GND 6V
OPEN GND 2×Vcc
Waveforms – 1
tr 90 % Input Vref 10 % t PLH Vref 90 % Vref 10 % t PHL VOH Output Notes: 1. 2. Vref VOL t r = 2.5 ns, tf = 2.5 ns Input waveform : PRR = 10 MHz, duty cycle 50% tf VIH GND
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HD74LVC16245A
Waveforms – 2
tf G 90 % Vr.