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HD29050
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Dual Differential Line Drivers / ReceiversWith 3 State Outputs
The HD29050 features differential line drivers / receivers with three state output designed to meet the spec of EIA RS - 422A and 423A. Each device has two drivers / receivers in a 16 pin package. The device becomes in enable state when active high for a driver and active low for a receiver.
Pin Arrangement
R1B R1A R1Y 1 2 3 16 VCC 15 D1A 14 D1Y 13 D1Z 12 D Enable 11 D2Z 10 D2Y 9 (Top View) D2A
R 4 Enable R2Y 5 6 7 8
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Features
Driver
R2A R2B GND
* Built in current restriction when short circuit * Power up / down protection. * High output current I OH = -40 mA IOL = 40 mA Receiver * Input hysteresis (Typ. 50 mV) * In phase input voltage 200 mV of input sensitivity in the range -7 to +12 V.
Function Table
Drivers Input A L H X Enable H H L Output Y L H Z Receivers Differential Input A - B VID 0.2 V -0.2 V < VID < 0.2 V VID -0.2 V X H L Z X ? : : : : : High level Low level High impedance Immaterial Irrelevant Enable L L L H Output Y H ? L Z Output Z H L Z
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HD29050
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HD29050
Absolute Maximum Ratings
Item Supply Voltage
*1 *3 *2 *3
Symbol VCC VIN VID IO VIE VIN
*4 *5
Ratings 7 25 25 50 5.5 5.5 -1.0 to 7.0 0 to 70 -65 to 150
Unit V V V mA V V V C C
Input Voltage A , B Output Current Input Voltage
*3
Differential Input Voltage Enable Input Voltage
*4
Output Applied Voltage
VO Topr Tstg
Operating Temperature Range Storage Temperature Range
Notes: 1. All voltage values except for differential input voltage are with respect to network ground terminal.
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corresponding inverting input. 3. Only receiver 4. Only driver 5. Z state 6. 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 In Phase Input Voltage Differential Input Voltage Enable Input Voltage Input Voltage
*2 *1 *1
Symbol VCC VIC VID VIE VIN Topr
Min 4.75 -7.0 -6.0 0 0 0
Typ 5.0
Max 5.25 12 6.0 5.25 5.25
Unit V V V V V C
Operating Temperature Notes: 1. Only receiver 2. Only driver
25
70
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HD29050
Electrical Characteristics (Ta = 0 to +70C)
Driver
Item Input Voltage Symbol VIHD VILD Input Clamp Voltage VIKD 2.5 Min 2.0 0.8 -1.5 Typ Max Unit V V V VCC = 4.75 V II = -18 mA VCC = 4.75 V IOH = -20 mA VCC = 4.75 V IOH = -40 mA VCC = 4.75 V IOL = 20 mA VCC = 4.75 V IOL = 40 mA VCC = 5.25 V, VO = 0.5 V Enable = 0.8 V VCC = 5.25 V, VO = 2.7 V Enable = 0.8 V VCC = 0 V VO = -0.25 V VCC = 0 V VO = 6.0 V VCC = 5.25 V VI = 5.25 V VCC = 5.25 V VI = 2.7 V VCC = 5.25 V VI = 0.4 V Conditions
Output Voltage
VOHD
V
2.4
V
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VOLD
0.45
V
0.5
V A A A A A A A V V
Output Leak Current
IOZD
-100
100
-100
100
IO(Off)
-100
100
Input Current
IID
100
IIHD
20
IIHD VOC VOD2 VOD Short Circuit Output Current
*1
-360 0.4 2.0 0.4 -30 -150
Differential Output Voltage
V mA VCC = 5.25 V VO = 0 V
IOSD
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Electrical Characteristics (Ta = 0 to +70C)
Receiver
Item Differential Input Threshold Voltage
*2
Symbol VTHR
Min
Typ
Max 0.2
Unit Conditions V VO 2.7 V -7.0 V < VIC < 12 V VO 0.45 V -7.0 V < VIC < 12 V VIN = 12 V 0 V VCC 5.25 V
-0.2 IIBR
V
Input Current
1.0 -0.8
mA
mA VIN = -7 V 0 V VCC 5.25 V V VCC = 4.75 V, IO = -400 A VID = 0.4 V, -7.0 V < V ICM < 12 V VCC = 4.75 V, IO = 8.0 mA VID = -0.4 V, -7.0 V < V ICM < 2 V VCC = 5.25 V, VO = 0.4 V VID = 3.0 V, Enable = 2.0 V VCC = 5.25 V, VO = 2.4 V VID = -3.0 V, Enable = 2.0 V VCC = 5.25 V, VO = 0 V VID = 3.0 V
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VOHR
2.7
VOLR
0.45
V
Output Leak Current
IOZR
-100
100
A A mA
-100
*1
100
Short Circuit Output Current Input Voltage
IOSR VIHE VILE
-15 2.0
-85
V 0.8 -100 20 100 -1.5 V A A A V VCC = 5.25 V, VIL = 0.4 V VCC = 5.25 V, VIH = 2.7 V VCC = 5.25 V, VIH = 5.25 V VCC = 4.75 II = -18 mA
Input Current
IILE IIHE IIE
Input Clamp Voltage
VIKE
Supply
Item Supply Current Symbol ICC Min Typ 55
*3
Max 80
Unit mA
Conditions VCC = 5.25 V
Notes: 1. Not more than one output should be shorted at a time, and duration of the short circuit should not exceed one second. 2. In this table, only the threshold voltage is expressed in algebra. 3. All typical values are at V CC = 5 V, Ta = 25C.
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HD29050
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HD29050
Switching Characteristics (Ta = 25C, VCC = 5 V)
Driver
Item Propagation Delay Time Symbol tPLHD Min Typ Max 20 Unit ns ns Conditions CL = 30 pF, RL = 75 to GND RL = 180 to VCC CL = 30 pF, RL = 75 to GND RL = 180 to VCC CL = 30 pF, RL = 75 to GND RL = 180 to VCC CL = 30 pF RL = 75 to GND CL = 30 pF RL = 180 to VCC CL = 10 pF RL = 75 to GND CL = 10 pF
tPHLD
*1
20 4
Propagation Delay Time Difference Output Enable Time
tSKD
ns
tZHD tZLD
20
ns
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35 20
ns
Output Disable Time
tHZD
ns
tLZD
25
ns
Receiver
Item Propagation Delay Time Symbol tPLHR Min Typ Max 40 Unit ns ns Conditions CL = 15 pF
tPHLR
40 20
CL = 15 pF
Output Enable Time
tZHR
ns
CL = 15 pF RL = 5 K to GND CL = 15 pF RL = 2 K to VCC CL = 15 pF, RL = 5 K to GND RL = 2 K to VCC
tZLR tHZR
25
ns
Output Disable Time
30
ns
tLZR
30
ns
Note: 1. tSKD = tPLHD - tPHLD
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DC Test ( VOD2 , VOD , VOC, VOC ) VOD2 , VOD Test
Output Y VOD2
50
Output Z
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50
VOC, VOC Test
Y 50 R 50 VOC
Z
VOD and VOC indicate the differences of voltage from the former states when Y and Z outputs are inversed. VOD = VOD2 - VOD2 VOC = VOC - VOC
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HD29050
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1. tPLHD , tPHLD
Test circuit
Enable 3V 5V Input Pulse Generator
*1
Waveforms
3V Output Y A Z CL = 30pF
*2
Input A
1.3 V tPLHD
1.3 V tPHLD 1.3 V tPLHD VOL VOH 0V VOH
RL = 180 RL = 75 Output Y Output Z
1.3 V tPHLD
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1.3 V tSKD
1.3 V VOL tSKD
2. tZHD , tZLD , tHZD , tLZD
Test circuit
Input Pulse Generator Enable
*1
Waveforms
3V 5V Output RL = 180
*3
Input Enable
1.3 V
1.3 V 0V VOH 0.5 V
tZHD tHZD Y Z CL = 30pF or 10pF
*2
3 V or GND
A
1.3 V Output tZLD tLZD VOL VOH 1.3 V 0.5 V VOL
RL = 75
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HD29050
3. tPLHR , tPHLR Test circuit
Enable Input Pulse Generator
*1
Waveforms
3V Input A Output CL = 15pF
*2
1.5 V
1.5 V 0V
A B 1.5 V
tPLHR Output Y
tPHLR VOH
1.3 V
1.3 V VOL
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4. tZHR , tZLR , tHZR , tLZR Test circuit
Input Pulse Generator Enable
*1
Waveforms
5V Input Enable
*4
3V 1.5 V 1.5 V 0V VOH 0.5 V 1.5 V Output Y All diodes are 1S2074 H tZLR tLZR VOL VOH 1.5 V 0.5 V VOL
S1 Output
tZHR tHZR
Va +1.5 or -1.5 V
A B CL = 15pF
*2
RL = 2 K RL = 5 K
S2 *4
Notes: 1. The pulse generator has the following characteristics: PRR = 1 MH Z, 50 % duty cycle, t r = tf = 6.0 ns. 2. CL includes probe and jig capacitance. 3. 75 connected between the pin and GND at t ZHD tHZD test. 180 connected between the pin and GND at t ZHD tHZD test. 4. At tHZR, tLZR test, S1 and S2 are closed. At tZHR test, S1 is open and S2 is closed. At tZLR test, S1 is closed and S 2 is open.
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HD29050
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Main Characteristics
* Output Characteristics (High level) [Driver] 5 Ta = 25C 4 Output Voltage (V OH) [V] VCC = 5.25 V Output Voltage (V OL) [V] VCC = 5.00 V 3 0.8 VCC = 4.75 V 0.6 1.0 Ta = 25C VCC = 5.00 V * Output Characteristics (Low level) [Driver]
2 VCC = 4.75 V
0.4
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1
0.2
VCC = 5.25 V
0 0 -40 -80 -120 -160 -200
0 0 20 40 60 80 100
Output Current (I OH) [mA]
Output Current (IOL) [mA]
* Output Characteristics (High level) [Receiver] 5 Ta = 25C VCC = 5.25 V 4 Output Voltage (V OH) [V] Output Voltage (V OL) [V] VCC = 5.00 V 0.8 1.0
* Output Characteristics (Low level) [Receiver] Ta = 25C VCC = 5.00 V
VCC = 4.75 V 0.6
3
2
0.4
1 VCC = 4.75 V 0 0 -20 -40 -60 -80 -100
0.2
VCC = 5.25 V
0 0 10 20 30 40 50 Output Current (IOL) [mA]
Output Current (IOH) [mA]
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HD29050
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* Input / Output Characteristics [Receiver] 5
VCC = 5 V Ta = 25C
4 Output Voltage (V OUT) [V] VID = 0 V 3 VT- 2 VT+
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1
0 -200 -100 0 100 200
Input Voltage (VU) [mV]
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