ACT4444 AEROFLEX | Alldatasheet
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FEATURES
❑ Transceiver meets MIL-STD-1553A & B, Macair A3818, A4905, A5232 and A5690 specs ❑ Bipolar Supply ±15V to ±12V , Logic Supply +5V ❑ Replacement for function of CT3232 & ACT4404 in new designs ❑ V oltage source output ❑ Monolithic construction ❑ Aeroflex is a Class H & K MIL-PRF-38534 Manufacturer ❑ Miniature Chipscale Package Bumped Chip Carrier™ (BCC++) GENERAL DESCRIPTION The Aeroflex Laboratories transceiver model ACT4444 is a monolithic transceiver which pr ovides full compliance with Macair and MIL-STD-1553 data bus requirements. The model ACT4444 performs the front-end analog function of inputting and outputting data through a transformer to a MIL-STD-1553 or Macair data bus with a few external components. The ACT4444 can be considered a "Universal" Transceiver in that it is compatible with MIL-STD-1553A, B, Macair A-3818, A-4905, A-5232 and A-5690. Design of these transceivers reflects particular attention to ac tive filter performance. This resu lts in low bit and word error rate with superior waveform purity and minimal zero crossover distortion. The AC T4444 active filter design has additional high frequency roll-off to provide the required Macair low harmonic distortion waveform without increasing the pulse delay characteristics significantly. Efficient transmitter electrical and thermal design provides low internal power dissipation and heat rise at high and well as low duty cycles. An optional receiver input threshold adjustment can be accomplished by the use of the "External Threshold" terminals. TRANSMITTER The Transmitter section accepts bi-phase TTL data at the input and when coupled to the data bus with a 1:1 transformer, isolated on the data bus side with two 55 Ohm fault isolation resist ors, and loaded by two 70 thru 85 Ohm term inations plus additi onal receivers, the da ta bus signal produced is 7.0 V olts minimum P-P at A-A’ (See Figure 3 or 4). When both DATA and DATA inputs are held low or high, the transmitter output becomes a high impedance and is “removed” from the line. In addition, an overri ding “INHIBIT" input provides for the removal of the transmitter output from the line. A logic “1” applied to the “I NHIBIT” takes priority over the condition of the data inputs and disables the transmitter (See Transmitter Logic Waveforms - Figure 1). The transmitter utilizes an active filter to suppress harmonics above 1 MHz to meet Macair specifications A-3818, A-4905, A-5232 and A-5690. The transmitter may be safely operated for an indefinite period at 100% duty cycle into a data bus short circuit. RECEIVER The Receiver section acce pts bi-phase differential data at the input and pr oduces two TTL signals at the output. The outputs ar e DATA and DATA, and represent positive and negative excurs ions of the input beyond a pre-determined threshold (See Receiver Logic Waveforms - Figure 2). The internal threshold is nominally set to detect data bus si gnals exceeding 1.05 V olts P-P and reject signals less than 0.6 V olts P-P when used with a 1:1 turns ratio transforme r (See Figure 3 or 4 for transformer data and t ypical connections). This threshold setting can be held by grounding the appropriate pins or modified with the use of external resistors. A low level at the Strobe input inhibits the DATA and DATA outputs. If unused, a 2K Ohm pull-up to +5 V olts is recommended. NOTE: BCC++ and Bumped Chip Carrier are Trademarks of Fujitsu Ltd. ACT4444 Transceiver Standard Products for MIL-STD-1553 / MACAIR in a Chipscale Package October 1, 2003 Preliminary
Operating Case Temperature -40°C to +85°C Storage Case Temperature -65°C to +150°C Power Supply V oltages ±16 V +7 V Logic Input V oltage -0.3 V to +5.5 V Receiver Differential Input ±40 V Receiver Input V oltage (Common Mode) ±10V Driver Peak Output Current 150 mA Total Package Power Dissipation over the Full Operating Case Temperature Range * 3.25 Watts Maximum Junction to Case Temperature 3.25°C Junction-Case, Thermal Resistance 1°C/W * See Aeroflex Application Note # 112 for reference. ELECTRICAL CHARACTERISTICS – TRANSMITTER SECTION 1/ 2/ INPUT CHARACTERISTICS, TX DATA IN OR TX DATA IN Parameter Condition Symbol Min Typ Max Unit "0" Input Current V IN = 0.4 V I ILD - -0.2 -0.4 mA "1" Input Current V IN = 2.7 V I IHD -1 . 0 4 0µ A "0" Input V oltage - VIHD -- 0 . 7 V "1" Input V oltage - VIHD 2.0 - - V INHIBIT CHARACTERISTICS "0" Input Current V IN = 0.4 V I ILI - -0.2 -0.4 mA "1" Input Current V IN = 2.7 V I IHI -1 . 0 4 0µ A "0" Input V oltage - VILI -- 0 . 7 V "1" Input V oltage - VIHI 2-- V Delay from TX inhibit(0→1) to inhibited output - tDXOFF - 300 500 nS Delay from TX inhibit, (1→0) to active output - tDXON - 300 500 nS Differential output noise, inhibit mode 3/ VNOI - 0.8 10 mVp-p Differential output impedance * 4/ ZOI 2K - - Ω * See Aeroflex Application Note # 113 for reference. OUTPUT CHARACTERISTICS Differential output - Direct coupled stub (See Figure 3 or 4) Pt. B - B’ ZO = 70Ω-85Ω VO 26 29 32 Vp-p Differential output offset - Direct coupled stub Figure 3 or 4 VOS - - ±360 mVpk Differential output rise / fall times (See Figure 5) 10% - 90% tR & tF 200 250 300 nS Delay from 50% point of TX DATA or TX DATA input to zero crossing of differential output. - tDTX 280 350 nS
ELECTRICAL CHARACTERISTICS – RECEIVER SECTION 1/ 2/ Parameter Condition Symbol Min Typ Max Unit Differential Input Impedance f = 1MHz ZIN 10K - - Ω Differential Input V oltage Range - VIDR - - 40 Vp-p Input Common Mode V oltage Range - VICR 10 - - Vp-p Common Mode Rejection Ratio - CMRR 40 - - dB STROBE CHARACTERISTICS (LOGIC "0" INHIBITS OUTPUT) "0" Input Current V S = 0.4 V I IL - -0.2 -0.4 mA "1" Input Current V S = 2.7 V I IH -1 . 0 + 4 0 µ A "0" Input V oltage - VIL -- 0 . 7 V "1" Input V oltage - VIH 2.0 - - V Strobe Delay (Turn-on or Turn-off) - tSD - - 250 nS THRESHOLD CHARACTERISTICS (SINEWA VE INPUT ) Internal Threshold V oltage (See Figure 3 or 4) Pt. B - B’ 1MHz VTH 0.60 0.80 1.10 Vp-p OUTPUT CHARACTERISTICS, RX DATA AND RX DATA "1" State I OH = -0.4 mA V OH 2.5 3.6 - V "0" State I OL = 4 mA V OL -0 . 3 5 0 . 5 V Delay (average), from differential input zero crossings to RX DATA and RX DATA output 50% points 6/ tDRX - 300 500 nS POWER SUPPLY CURRENT 1/ 2/ Duty Cycle Condition Symbol Typ Max Unit Transmitter Standby Pt. B - B’, ZO = 70 Ω, VO = 29 VPK-PK Bit Pattern = FFFFHEX Figure 3 or 4 ICC IEE IL mA 25% I CC IEE IL 50% I CC IEE IL 100% I CC IEE IL 105 120 140
TYPICAL HYBRID POWER DISSIPATION* Power Supply Conditions Condition Standby 100% Duty Cycle Unit PSC1 VCC = +15V VEE = -15V VL = +5V Pt. B - B’, ZO = 70 Ω, VO = 29 VPK-PK Bit Pattern = FFFFHEX Figure 3 or 4 0.540 2.167 Watts PSC2 VCC = +15V VEE = -12V VL = +5V 0.465 1.852 PSC3 VCC = +12V VEE = -12V VL = +5V 0.450 1.600 * See Aeroflex Application note# 112 for reference. RECOMMENDED POWER SUPPLY VOLTAGE RANGE VCC +11.4 V olts to +15.75 V olts VEE -11.4 V olts to -15.75 V olts VL +4.5 V olts to +5.5 V olts Notes: 2. All typical values are measured at +25°C. 3. Characteristics guaranteed by design, not production tested. 4. Power ON/OFF, measured from 75KHz to 1MHz at Point A-A’ Figure 3 or 4, in accordance with MIL-STD-1553B paragraph 5. At point A-A’ on Figure 3 or 4, 2.5µS after midpoint crossing of the parity bit of the last word of a 660 µS message. 6. This test is peformed while the Transceiver is reading its own transmission. This condition is called "Wraparound". Standard TTL loads applied to RX DATA Outputs.
FIGURE 5 – TRANSMITTER (TX) OUTPUT FIGURE 6 – TRANSMITTER (TX) 6.5V P-P MIN 8.0V P-P MAX 90% 10% tr* tf*
0 Volts
OUTPUT OFFSET* OUTPUT OFFSET* LAST BIT 2.5 µsec FIGURE 7 – TYPICAL HYBRID POWER DISSIPATION vs DUTY CYCLE * Rise and fall times measured at point A-A’ in Figure 3 or 4 *Offset measured at point A-A’ in Figure 3 or 4 W A VE FORM OUTPUT OFFSET 0 10 20 30 40 50 60 70 80 90 100 3.2 2.8 2.4 2.0 1.6 1.2 0.8 0.4 DUTY CYCLE, PERCENT POWER DISSIPATION WATTS 3.6 4.0 PSC 1 PSC 3 PSC 2
PACKAGE PIN OUT DESCRIPTION - ACT4444 Pin # Function Pin # Function
1 VCCTX* 33 COMP 1 NL
2 NC 34 V L
3 TX DATA OUT* 35 V EERX
4 NC 36 RX 2 IN
5 VEETX * 37 COMP 2 NL
6 TX DATA BUF IN 38 COMP 2 NH
7 VCA DATA OUT 39 COMP +VTH IN
8 TX DATA FIL OUT 40 COMP -VTH IN
10 V EETX 42 RX GND 1
11 TX DATA FIL OUT 43 -VTH RTN
12 VCA DATA OUT 44 -VTH
13 TX DATA BUF IN 45 +VTH
14 VEETX* 46 +VTH RTN
15 NC 47 V EERX
16 TX DATA OUT* 48 RX FIL OUT
17 NC 49 NC
18 V CCTX* 50 RX GND 2
19 VREF 51 RX DATA IN
20 CTRUNC 52 RX DATA IN
21 NC 53 V CCRX
22 NC 54 V L
23 VCA CONT1 55 GND 2
24 NC 56 V
L
25 NC 57 TX INHIBIT IN
26 GND 1 58 TX DATA IN
27 RX STROBE IN 59 TX DATA IN
28 RX 2 OUT 60 DEXORIN
29 RX GND 3 61 DEXORIN
30 RX 1 OUT 62 NC
31 RX 1 IN 63 NC
32 COMP 1 NH 64 NC
NC = No Connect * High Current Line (~100mA)
DETAIL "A" TOP VIEW DETAIL "B" (60 PL) DETAIL "C" (3 PL) PIN 1 IDENTIFER & ESD INDICATOR .05 X 9.00 ± .10 9.00 ± 0.10 0.67± .025 Notes 1. Dimensions in millimeters BOTTOM VIEW
8.2 TYP
8.15 TYP
C.L.(Pkg) C.L.(Pkg) "C""A" "B"C .20 x 45° .08 XYZ .30 ± .03 .08 XYZ .40 ±.03 .08 M XYZ .45 ± .03 .08 XYZ .45 ± .03 .08 XYZ .45 ± .03 .08 XYZ .45 ± .03 C .20 x 45°
0.80 MAX
.075± .025 Z .20 Z Z 0.20 Y ACT4444 Z Y Z Pin 1 Pin 17 Pin 33 Pin 49 .50± .10.50 TYP .50± .10 .50 TYP PACKAGE DESCRIPTION MM Inches 9 .354 8.2 .323 8.15 .321 0.8 .0315 0.67 .026 0.5 .020 0.45 .018 0.3 .012 0.2 .008 0.1 .00394 0.08 .00315 0.075 .00295 0.05 .002 0.03 .0012 0.025 .001 0.020 .0008 M M M M M 7.4 6.8 6.8 7.4
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