HI-6120 HOLTIC [Holt Integrated Circuits], HI-6120 Datasheet - Page 145

• Manufacturer Part Number: HI-6120
• Description: MIL-STD-1553 Remote Terminal ICs
• Manufacturer: HOLTIC [Holt Integrated Circuits]

Note 1: In actual use, the highest practical transmit duty cycle is 96%, occurring when a Remote Terminal responds to a series
of 32 data word transmit commands (RT to BC) repeating with minimum intermessage gap of 4μs (2μs dead time) and typical HI-
6110 RT response delay of 5μs.
Note 2: While one bus continuously transmits, the power delivered by the 3.3V power supply is 3.3V × 720mA typical = 2.4W. Of
this, 420mW is dissipated in the device, the remainder in the load.
17.4. AC Electrical Characteristics ― HI-6121 Host Bus Interface Timing
V
Input Common Mode Voltage
Threshold Voltage
(Direct-Coupled)
Threshold Voltage
(Transformer-Coupled)
TRANSMITTER (Measured at Point “AD” in Figure 26 unless otherwise specified)
Output Voltage
Output Noise
Output Dynamic Offset Voltage
Output Resistance
Output Capacitance
HI-6121 INTERFACE TIMING (SPI Host Bus Interface)
DD
= 3.3V, GND = 0V, T
Parameters
A
= Operating Temperature Range (unless otherwise stated)
Parameters
Detect
No Detect
Detect
No Detect
Direct Coupled
Transformer Coupled
Direct Coupled
Transformer Coupled
SPI SI Data hold time after SCK rising edge
SPI SI Data set-up time to SCK rising edge
CE hold time after last SCK falling edge
CE set-up time to first SCK rising edge
SO high-impedance after CE inactive
CE inactive between SPI instructions
SO valid after SCK falling edge
HOLT INTEGRATED CIRCUITS
HI-6120, HI-6121
Symbol
SCK clock Period
V
V
V
V
V
V
V
V
R
C
V
V
THND
THND
OUT
OUT
DYN
DYN
ICM
THD
THD
OUT
OUT
ON
SCK high time
SCK low time
145
70Ω Load (Measured at Point
70Ω Load (Measured at Point
1 Mhz Sine Wave (Measured
1 Mhz Sine Wave (Measured
Differential, not transmitting
at Point “AD“ in Figure 26)
at Point “AT“ in Figure 27)
Test Conditions
Differential, inhibited
“AT“ in Figure 27)
“AT“ in Figure 27)
1 MHz sine wave
35Ω Load
35Ω Load
Symbol
t
t
t
t
t
t
t
SCKH
SCKL
t
t
t
CYC
CES
CEH
CPH
CHZ
DS
DH
DV
Min
100
100
50
25
25
10
10
25
-
-
Limits
Min
-250
1.15
0.86
18.0
6.0
-90
Typ
10
-5
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Limits
Typ
Max
20
75
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
20.0
0.28
14.0
27.0
10.0
250
0.2
9.0
Units
+5
90
15
-
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
mVp-p
Unit
Vp-p
Vp-p
Vp-p
Vp-p
Vp-p
Vp-p
V-pk
mV
mV
kΩ
pF