HT26LS32
QUAD RS-422, RS-423 CMOS Differential Line Receiver
GENERAL DESCRIPTION
The HT26LS32 is a CMOS quad differential line receiver designed
to meet the standard
RS-
422, RS-423 requirements. The HT26LS32 has an input sensitivity of 200mv over the common
mode input voltage range
of 7V. To improve noise margin and output stability for slow changing
input signal, special hysteresis is built in the HT26LS32 circuit.The HT26LS32 is a high speed line
receiver designed to operate with MFM / RLL controllers and hard disk drives as well as RS-422, and
RS-423 differential applications. HT26LS32 provides TTL compatible outputs to interface with
standard 74LS and CMOS design environments. HT26LS32 is suitable for low power 5V operation.
DIP−16 N SUFFIX
HT26LS32ANZ
16
FEATURES
1
• Pin-to-Pin Compatible with National AM26LS32
• Low Power CMOS Design
• Three-State Outputs with Enable Pin
SOP−16 R SUFFIX
HT26LS32ARZ
16
• Meets the EIA RS-422 Requirements
• Low Propagation Delays
• High Speed
1
SSOP−16 S SUFFIX
HT26LS32ARTZ
16
1
1
INPUT A-
INPUT D-
INPUT A+
INPUT D+
OUTPUT A
OUTPUT D
QFN16 Q SUFFIX
HT26LS32ARQZ
ENABLE
-ENABLE
OUTPUT B
OUTPUT C
INPUT B+
INPUT C+
INPUT B-
INPUT C-
Figure 1. Block Diagram
Rev. 01
PIN CONFIGURATION
INPUT A
OUTPUT A+
OUTPUT AENABLE
OUTPUT BOUTPUT B+
INPUT B
GND
1
16
VCC
2
15
3
14
4
13
5
12
6
11
7
10
8
9
INPUT D
OUTPUT D+
OUTPUT D-ENABLE
OUTPUT COUTPUT C+
INPUT C
SOPP16/TSSOP16/DIP16
PIN DESCRIPTION
Pin #
Symbol
Type
Description
1
INPUT A-
I
Receiver A differential inverting input pin.
2
INPUT A+
I
Receiver A differential non-inverting input pin.
3
OUTPUT A
O
Receiver A output pin.
4
ENABLE
I
Gate control (active high). This pin is one of the two control pins which enables or disables all
four receivers.
5
OUTPUT B
O
Receiver B output pin.
6
INPUT B+
I
Receiver B differential non-inverting input pin.
7
INPUT B-
I
Receiver B differential inverting input pin.
8
GND
O
Signal and power ground.
9
INPUT C-
I
Receiver C differential inverting input pin.
10
INPUT C+
I
Receiver C differential non-inverting input pin.
11
OUTPUT C
O
Receiver C output pin.
12
-ENABLE
I
Gate control (active low). See ENABLE description
13
OUTPUT D
O
Receiver D output pin.
14
INPUT D+
I
Receiver D differential non-inverting input pin.
15
INPUT D-
I
Receiver D differential inverting input pin.
16
VCC
I
Power supply pin.
Rev. 01
AC ELECTRICAL CHARACTERISTICS
Test Conditions: TA = -40C - +85C, VCC = 5.0V + 10% unless otherwise specified.
Symbol
Parameter
Min.
Typ.
Max.
Unit
Conditions
T1
Propagation Delay, Input to
Output
8
10
ns
S1=VCC
T2
Propagation Delay, Input to
Output
18
20
ns
S1=GND
T3
Output Enable Time
18
20
ns
VDIF=2.5V
T4
Output Disable Time
18
20
ns
VDIF=2.5V
DC ELECTRICAL CHARACTERISTICS
Test Conditions: TA = -40C - +85C, VCC = 5.0V + 10% unless otherwise specified.
Symbol
Parameter
Min.
VIH
Enable High Level
2.0
VIL
Enable Low Level
VOH
Output High Level
VOL
Output Low Level
VID
Differential Input Level
VH
Input Hysteresis
IIN
Input Current
ICC
Operating Current
IOZ
Three-State Output Leakage
IEN
Enable Input Current
VR
Input Resistance
Typ.
Max.
4.2
0.4
-0.2
0.2
50
V
V
IOH= -6mA
V
IOH= 6mA
V
-7V < VCM < +7V
mV
+1.0
µA
mA
VDIF=+1V
+5.0
µA
VOUT=VCC or GND
µA
VIN=VCC or GND
15
KQ
-7V < VCM < +7V
12
+1.0
+1.0
5
Conditions
V
0.8
3.8
Unit
Specifications are subject to change without notice
ABSOLUTE MAXIMUM RATINGS
Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7V
Voltage at Any Pin . . . . . . . . GND-0.3V to VCC + 0.3V
Operating Temperature . . . . . . . . . . . –40C to +85C
Storage Temperature . . . . . . . . . . . . -60C to +160C
Package Dissipation . . . . . . . . . . . . . . . . . . . . . 500mW
Rev. 01
Enable
-Enable
Input
L
L
H
H
H
H
H
H
L
L
L
L
Z
Z
L
L
H
H
Differential
Non-Inverting
Non-Inverting
Output
Output
X
X
L
L
H
H
Differential
Inverting
Inverting
Output
Output
X
X
H
H
L
L
Notes
X = Don’t care
Z = Three-State (high impedance)
Table 1. Functional Table
VCC
S1
S1
INPUT A
INPUT A
-INPUT A
-INPUT A
U1
U1
R1
R1
10K
10K
OUTPUT A
OUTPUT A
C1
C1
50pF
50pF
-ENABLE
-ENABLE
Receiver
Receiver
Figure 2. Test Condition
Rev. 01
ENABLE
-ENABLE
INPUT X+
INPUT X-
T1
T2
T3
T4
OUTPUT X
Figure 3. Differential Line Receiver Timing
Rev. 01
Package Dimensions
DIP16-P-300-2.54A
Unit: mm
Weight: 1.11 g (Typ.)
Rev. 01
TSSOP16-P-225-0.65B
Unit: mm
Weight: 0.07 g (Typ.)
P-SOP16-0410-1.27-002
Unit: mm
Weight: 0.15 g (Typ.)
Rev. 01
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